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@ -1,3 +1,5 @@
|
||||
XLCYun 翻译中
|
||||
|
||||
Manjaro Gaming: Gaming on Linux Meets Manjaro’s Awesomeness
|
||||
======
|
||||
[![Meet Manjaro Gaming, a Linux distro designed for gamers with the power of Manjaro][1]][1]
|
||||
|
||||
@ -1,3 +1,4 @@
|
||||
leemeans translating
|
||||
Getting Started with ncurses
|
||||
======
|
||||
How to use curses to draw to the terminal screen.
|
||||
|
||||
@ -1,22 +1,19 @@
|
||||
#Being translated by YPBlib
|
||||
======
|
||||
|
||||
Why you should use named pipes on Linux
|
||||
为什么应该在Linux上使用命名管道
|
||||
======
|
||||
|
||||
|
||||
|
||||
Just about every Linux user is familiar with the process of piping data from one process to another using | signs. It provides an easy way to send output from one command to another and end up with only the data you want to see without having to write scripts to do all of the selecting and reformatting.
|
||||
估计每一位Linux使用者都熟悉使用 “|”符号将数据从一个进程传输到另一个进程的操作。它使用户能简便地从一个命令输出数据到另一个命令并筛选出想要的数据而无须写脚本进行选择、重定格式等操作。
|
||||
|
||||
There is another type of pipe, however, one that warrants the name "pipe" but has a very different personality. It's one that you may have never tried or even thought about -- the named pipe.
|
||||
还有另一种管道， 虽然也叫“管道”这个名字却有着非常不同的性质。即您可能尚未使用甚至尚未知晓的——命名管道。
|
||||
|
||||
**Also read:[11 pointless but awesome Linux terminal tricks][1]**
|
||||
**另可参考:[11 pointless but awesome Linux terminal tricks][1]**
|
||||
|
||||
One of the key differences between regular pipes and named pipes is that named pipes have a presense in the file system. That is, they show up as files. But unlike most files, they never appear to have contents. Even if you write a lot of data to a named pipe, the file appears to be empty.
|
||||
普通管道与命名管道的一个主要区别就是命名管道是它们以文件形式实实在在地存在于系统中存在。但是与其它文件不同的是，命名管道文件似乎从来没有文件内容。即使用户往命名管道中写入大量数据，该文件看起来还是空的。
|
||||
|
||||
### How to set up a named pipe on Linux
|
||||
### 如何在Linux上创建命名管道
|
||||
|
||||
Before we look at one of these empty named pipes, let's step back and see how a named pipe is set up. You would use a command called **mkfifo**. Why the reference to "FIFO"? Because a named pipe is also known as a FIFO special file. The term "FIFO" refers to its first-in, first-out character. If you fill a dish with ice cream and then start eating it, you'd be doing a LIFO (last-in, first-out) maneuver. If you suck a milkshake through a straw, you'd be doing a FIFO one. So, here's an example of creating a named pipe.
|
||||
Before在我们研究这些空命名管道之前，先追根溯源来看看命名管道是如何被创建的。您可以使用**mkfifo** 命令。提到“FIFO”是因为命名管道也被认为是FIFO特殊文件。术语“FIFO”指的是它的先进先出("first-in, first-out ")属性。如果某人在吃一个甜筒冰淇淋，那么他执行的就是一个LIFO(后进先出last-in, first-out)操作。如果他通过吸管饮食一个冰淇淋，那就在执行一个FIFO操作。好，接下来是一个创建命名管道的例子。
|
||||
```
|
||||
$ mkfifo mypipe
|
||||
$ ls -l mypipe
|
||||
@ -24,7 +21,7 @@ prw-r-----. 1 shs staff 0 Jan 31 13:59 mypipe
|
||||
|
||||
```
|
||||
|
||||
Notice the special file type designation of "p" and the file length of zero. You can write to a named pipe by redirecting output to it and the length will still be zero.
|
||||
（译者注：实际环境中当您输入`mkfifo mypipe`后命令行可能会阻塞在当前位置，这是因为以只写方式打开的FIFO要阻塞到其他某个进程以读方式打开该FIFO。您可在另一个终端中输入 `cat < mypipe`解决，注意两个终端中保证mypipe的路径一致。）注意一下特殊的文件类型标记“p”以及文件大小为0。您可以将重定向数据写入命名管道文件，而文件大小依然为0。
|
||||
```
|
||||
$ echo "Can you read this?" > mypipe
|
||||
$ ls -l mypipe
|
||||
@ -32,23 +29,23 @@ prw-r-----. 1 shs staff 0 Jan 31 13:59 mypipe
|
||||
|
||||
```
|
||||
|
||||
So far, so good, but hit return and nothing much happens.
|
||||
正如上面所说，敲击回车似乎什么都没有发生。
|
||||
```
|
||||
$ echo "Can you read this?" > mypipe
|
||||
|
||||
|
||||
```
|
||||
|
||||
While it might not be obvious, your text has entered into the pipe, but you're still peeking into the _input_ end of it. You or someone else may be sitting at the _output_ end and be ready to read the data that's being poured into the pipe, now waiting for it to be read.
|
||||
不那么显然的是，用户输入的文本已经进入该命名管道。可能用户却还在盯着输入端，事实上应有用户或其他人在输出端读取接受数据。
|
||||
```
|
||||
$ cat mypipe
|
||||
Can you read this?
|
||||
|
||||
```
|
||||
|
||||
Once read, the contents of the pipe are gone.
|
||||
一旦被读取之后，管道中的内容就不再被保存。
|
||||
|
||||
Another way to see how a named pipe works is to perform both operations (pouring the data into the pipe and retrieving it at the other end) yourself by putting the pouring part into the background.
|
||||
另一种研究命名管道如何工作的方式是通过在后台传送数据的方式完成传送和接受两样操作。
|
||||
```
|
||||
$ echo "Can you read this?" > mypipe &
|
||||
[1] 79302
|
||||
@ -58,21 +55,21 @@ Can you read this?
|
||||
|
||||
```
|
||||
|
||||
Once the pipe has been read or "drained," it's empty, though it still will be visible as an empty file ready to be used again. Of course, this brings us to the "why bother?" stage.
|
||||
一旦管道被读取或“耗干”，该管道就清空了，尽管我们还能看见它并再次使用，可为什么要费此周折呢？
|
||||
|
||||
### Why use named pipes?
|
||||
### 为何要使用命名管道?
|
||||
|
||||
Named pipes are used infrequently for a good reason. On Unix systems, there are almost always many ways to do pretty much the same thing. There are many ways to write to a file, read from a file, and empty a file, though named pipes have a certain efficiency going for them.
|
||||
命名管道很少被使用的理由似乎很充分。毕竟在Unix系统上，总有多种不同的方式完成同样的操作。有多种方式写文件、读文件、清空文件，尽管命名管道比他们来得更高效。
|
||||
|
||||
For one thing, named pipe content resides in memory rather than being written to disk. It is passed only when both ends of the pipe have been opened. And you can write to a pipe multiple times before it is opened at the other end and read. By using named pipes, you can establish a process in which one process writes to a pipe and another reads from a pipe without much concern about trying to time or carefully orchestrate their interaction.
|
||||
值得注意的是，命名管道的内容驻留在内存中而不是被写到硬盘上。数据内容只有在输入输出端都打开时才会传送。用户可以在管道的输出端打开之前向管道多次写入。通过使用命名管道，用户可以创建一个同时有一个进程写入管道和一个进程读取管道的进程而不用关心协调二者时间上的同步。
|
||||
|
||||
You can set up a process that simply waits for data to appear at the output end of the pipe and then works with it when it does. In the command below, we use the tail command to wait for data to appear.
|
||||
用户可以创建一个单纯等待数据出现在输出端的管道，并在拿到输出数据后对其进行操作。
|
||||
```
|
||||
$ tail -f mypipe
|
||||
|
||||
```
|
||||
|
||||
Once the process that will be feeding the pipe has finished, we will see some output.
|
||||
一旦喂给管道数据的进程结束了，我们就可以看到一些输出。
|
||||
```
|
||||
$ tail -f mypipe
|
||||
Uranus replicated to WCDC7
|
||||
@ -82,7 +79,7 @@ Server replication operation completed
|
||||
|
||||
```
|
||||
|
||||
If you look at the process writing to a named pipe, you might be surprised by how little resources it uses. In the ps output below, the only significant resource use is virtual memory (the VSZ column).
|
||||
如果研究一下向命名管道写入的进程，用户也许会惊讶于它的资源消耗之少。在下面的`ps`命令输出中，唯一显著的资源消耗是虚拟内存（VSZ那一列）。
|
||||
```
|
||||
ps u -P 80038
|
||||
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
|
||||
@ -90,14 +87,14 @@ shs 80038 0.0 0.0 108488 764 pts/4 S 15:25 0:00 -bash
|
||||
|
||||
```
|
||||
|
||||
Named pipes are different enough from the more commonly used Unix/Linux pipes to warrant a different name, but "pipe" really invokes a good image of how they move data between processes, so "named pipe" fits pretty well. Maybe you'll come across a task that will benefit significantly from this very clever Unix/Linux feature.
|
||||
命名管道与Unix系统上更常用的管道相比足以不同到拥有另一个名号，但是“管道”实在能反映出它们如何在进程间传送数据的形象，故将称其为“命名管道”还真是恰如其分。也许您在执行操作时就能从这个聪明的Unix特性中获益匪浅呢。
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
via: https://www.networkworld.com/article/3251853/linux/why-use-named-pipes-on-linux.html
|
||||
|
||||
作者：[Sandra Henry-Stocker][a]
|
||||
译者：[译者ID](https://github.com/译者ID)
|
||||
译者：[译者ID](https://github.com/YPBlib)
|
||||
校对：[校对者ID](https://github.com/校对者ID)
|
||||
|
||||
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
|
||||
|
||||
@ -0,0 +1,191 @@
|
||||
Shell Scripting: Dungeons, Dragons and Dice
|
||||
======
|
||||
In my [last article][1], I talked about a really simple shell script for a game called Bunco, which is a dice game played in rounds where you roll three dice and compare your values to the round number. Match all three and match the round number, and you just got a bunco for 25 points. Otherwise, any die that match the round are worth one point each. It's simple—a game designed for people who are getting tipsy at the local pub, and it also is easy to program.
|
||||
|
||||
The core function in the Bunco program was one that produced a random number between 1–6 to simulate rolling a six-sided die. It looked like this:
|
||||
|
||||
```
|
||||
|
||||
rolldie()
|
||||
{
|
||||
local result=$1
|
||||
rolled=$(( ( $RANDOM % 6 ) + 1 ))
|
||||
eval $result=$rolled
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
It's invoked with a variable name as the single argument, and it will load a random number between 1–6 into that value—for example:
|
||||
|
||||
```
|
||||
|
||||
rolldie die1
|
||||
|
||||
```
|
||||
|
||||
will assign a value 1..6 to $die1\. Make sense?
|
||||
|
||||
If you can do that, however, what's to stop you from having a second argument that specifies the number of sides of the die you want to "roll" with the function? Something like this:
|
||||
|
||||
```
|
||||
|
||||
rolldie()
|
||||
{
|
||||
local result=$1 sides=$2
|
||||
rolled=$(( ( $RANDOM % $sides ) + 1 ))
|
||||
eval $result=$rolled
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
To test it, let's just write a tiny wrapper that simply asks for a 20-sided die (d20) result:
|
||||
|
||||
```
|
||||
|
||||
rolldie die 20
|
||||
echo resultant roll is $die
|
||||
|
||||
```
|
||||
|
||||
Easy enough. To make it a bit more useful, let's allow users to specify a sequence of dice rolls, using the standard D&D notation of nDm—that is, n m-sided dice. Bunco would have been done with 3d6, for example (three six-sided die). Got it?
|
||||
|
||||
Since you might well have starting flags too, let's build that into the parsing loop using the ever handy getopt:
|
||||
|
||||
```
|
||||
|
||||
while getopts "h" arg
|
||||
do
|
||||
case "$arg" in
|
||||
* ) echo "dnd-dice NdM {NdM}"
|
||||
echo "NdM = N M-sided dice"; exit 0 ;;
|
||||
esac
|
||||
done
|
||||
shift $(( $OPTIND - 1 ))
|
||||
for request in $* ; do
|
||||
echo "Rolling: $request"
|
||||
done
|
||||
|
||||
```
|
||||
|
||||
With a well formed notation like 3d6, it's easy to break up the argument into its component parts, like so:
|
||||
|
||||
```
|
||||
|
||||
dice=$(echo $request | cut -dd -f1)
|
||||
sides=$(echo $request | cut -dd -f2)
|
||||
echo "Rolling $dice $sides-sided dice"
|
||||
|
||||
```
|
||||
|
||||
To test it, let's give it some arguments and see what the program outputs:
|
||||
|
||||
```
|
||||
|
||||
$ dnd-dice 3d6 1d20 2d100 4d3 d5
|
||||
Rolling 3 6-sided dice
|
||||
Rolling 1 20-sided dice
|
||||
Rolling 2 100-sided dice
|
||||
Rolling 4 3-sided dice
|
||||
Rolling 5-sided dice
|
||||
|
||||
```
|
||||
|
||||
Ah, the last one points out a mistake in the script. If there's no number of dice specified, the default should be 1\. You theoretically could default to a six-sided die too, but that's not anywhere near so safe an assumption.
|
||||
|
||||
With that, you're close to a functional program because all you need is a loop to process more than one die in a request. It's easily done with a while loop, but let's add some additional smarts to the script:
|
||||
|
||||
```
|
||||
|
||||
for request in $* ; do
|
||||
dice=$(echo $request | cut -dd -f1)
|
||||
sides=$(echo $request | cut -dd -f2)
|
||||
echo "Rolling $dice $sides-sided dice"
|
||||
sum=0 # reset
|
||||
while [ ${dice:=1} -gt 0 ] ; do
|
||||
rolldie die $sides
|
||||
echo " dice roll = $die"
|
||||
sum=$(( $sum + $die ))
|
||||
dice=$(( $dice - 1 ))
|
||||
done
|
||||
echo " sum total = $sum"
|
||||
done
|
||||
|
||||
```
|
||||
|
||||
This is pretty solid actually, and although the output statements need to be cleaned up a bit, the code's basically fully functional:
|
||||
|
||||
```
|
||||
|
||||
$ dnd-dice 3d6 1d20 2d100 4d3 d5
|
||||
Rolling 3 6-sided dice
|
||||
dice roll = 5
|
||||
dice roll = 6
|
||||
dice roll = 5
|
||||
sum total = 16
|
||||
Rolling 1 20-sided dice
|
||||
dice roll = 16
|
||||
sum total = 16
|
||||
Rolling 2 100-sided dice
|
||||
dice roll = 76
|
||||
dice roll = 84
|
||||
sum total = 160
|
||||
Rolling 4 3-sided dice
|
||||
dice roll = 2
|
||||
dice roll = 2
|
||||
dice roll = 1
|
||||
dice roll = 3
|
||||
sum total = 8
|
||||
Rolling 5-sided dice
|
||||
dice roll = 2
|
||||
sum total = 2
|
||||
|
||||
```
|
||||
|
||||
Did you catch that I fixed the case when $dice has no value? It's tucked into the reference in the while statement. Instead of referring to it as $dice, I'm using the notation ${dice:=1}, which uses the value specified unless it's null or no value, in which case the value 1 is assigned and used. It's a handy and a perfect fix in this case.
|
||||
|
||||
In a game, you generally don't care much about individual die values; you just want to sum everything up and see what the total value is. So if you're rolling 4d20, for example, it's just a single value you calculate and share with the game master or dungeon master.
|
||||
|
||||
A bit of output statement cleanup and you can do that:
|
||||
|
||||
```
|
||||
|
||||
$ dnd-dice.sh 3d6 1d20 2d100 4d3 d5
|
||||
3d6 = 16
|
||||
1d20 = 13
|
||||
2d100 = 74
|
||||
4d3 = 8
|
||||
d5 = 2
|
||||
|
||||
```
|
||||
|
||||
Let's run it a second time just to ensure you're getting different values too:
|
||||
|
||||
```
|
||||
|
||||
3d6 = 11
|
||||
1d20 = 10
|
||||
2d100 = 162
|
||||
4d3 = 6
|
||||
d5 = 3
|
||||
|
||||
```
|
||||
|
||||
There are definitely different values, and it's a pretty useful script, all in all.
|
||||
|
||||
You could create a number of variations with this as a basis, including what some gamers enjoy called "exploding dice". The idea is simple: if you roll the best possible value, you get to roll again and add the second value too. Roll a d20 and get a 20? You can roll again, and your result is then 20 + whatever the second value is. Where this gets crazy is that you can do this for multiple cycles, so a d20 could become 30, 40 or even 50.
|
||||
|
||||
And, that's it for this article. There isn't much else you can do with dice at this point. In my next article, I'll look at...well, you'll have to wait and see! Don't forget, if there's a topic you'd like me to tackle, please send me a note!
|
||||
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
via: http://www.linuxjournal.com/content/shell-scripting-dungeons-dragons-and-dice
|
||||
|
||||
作者：[Dave Taylor][a]
|
||||
译者：[译者ID](https://github.com/译者ID)
|
||||
校对：[校对者ID](https://github.com/校对者ID)
|
||||
|
||||
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
|
||||
|
||||
[a]:http://www.linuxjournal.com/users/dave-taylor
|
||||
[1]:http://www.linuxjournal.com/content/shell-scripting-bunco-game
|
||||
@ -0,0 +1,84 @@
|
||||
Evolving Your Own Life: Introducing Biogenesis
|
||||
======
|
||||
|
||||
Biogenesis provides a platform where you can create entire ecosystems of lifeforms and see how they interact and how the system as a whole evolves over time.
|
||||
|
||||
You always can get the latest version from the project's main [website][1], but it also should be available in the package management systems for most distributions. For Debian-based distributions, install Biogenesis with the following command:
|
||||
|
||||
```
|
||||
|
||||
sudo apt-get install biogenesis
|
||||
|
||||
```
|
||||
|
||||
If you do download it directly from the project website, you also need to have a Java virtual machine installed in order to run it.
|
||||
|
||||
To start it, you either can find the appropriate entry in the menu of your desktop environment, or you simply can type biogenesis in a terminal window. When it first starts, you will get an empty window within which to create your world.
|
||||
|
||||
|
||||
|
||||
Figure 1\. When you first start Biogenesis, you get a blank canvas so you can start creating your world.
|
||||
|
||||
The first step is to create a world. If you have a previous instance that you want to continue with, click the Game→Open menu item and select the appropriate file. If you want to start fresh, click Game→New to get a new world with a random selection of organisms.
|
||||
|
||||
|
||||
|
||||
Figure 2\. When you launch a new world, you get a random selection of organisms to start your ecosystem.
|
||||
|
||||
The world starts right away, with organisms moving and potentially interacting immediately. However, you can pause the world by clicking on the icon that is second from the right in the toolbar. Alternatively, you also can just press the p key to pause and resume the evolution of the world.
|
||||
|
||||
At the bottom of the window, you'll find details about the world as it currently exists. There is a display of the frames per second, along with the current time within the world. Next, there is a count of the current population of organisms. And finally, there is a display of the current levels of oxygen and carbon dioxide. You can adjust the amount of carbon dioxide within the world either by clicking the relevant icon in the toolbar or selecting the World menu item and then clicking either Increase CO2 or Decrease CO2.
|
||||
|
||||
There also are several parameters that govern how the world works and how your organisms will fare. If you select World→Parameters, you'll see a new window where you can play with those values.
|
||||
|
||||
|
||||
|
||||
Figure 3\. The parameter configuration window allows you to set parameters on the physical characteristics of the world, along with parameters that control the evolution of your organisms.
|
||||
|
||||
The General tab sets the amount of time per frame and whether hardware acceleration is used for display purposes. The World tab lets you set the physical characteristics of the world, such as the size and the initial oxygen and carbon dioxide levels. The Organisms tab allows you to set the initial number of organisms and their initial energy levels. You also can set their life span and mutation rate, among other items. The Metabolism tab lets you set the parameters around photosynthetic metabolism. And, the Genes tab allows you to set the probabilities and costs for the various genes that can be used to define your organisms.
|
||||
|
||||
What about the organisms within your world though? If you click on one of the organisms, it will be highlighted and the display will change.
|
||||
|
||||
|
||||
|
||||
Figure 4\. You can select individual organisms to find information about them, as well as apply different types of actions.
|
||||
|
||||
The icon toolbar at the top of the window will change to provide actions that apply to organisms. At the bottom of the window is an information bar describing the selected organism. It shows physical characteristics of the organism, such as age, energy and mass. It also describes its relationships to other organisms. It does this by displaying the number of its children and the number of its victims, as well as which generation it is.
|
||||
|
||||
If you want even more detail about an organism, click the Examine genes button in the bottom bar. This pops up a new window called the Genetic Laboratory that allows you to look at and alter the genes making up this organism. You can add or delete genes, as well as change the parameters of existing genes.
|
||||
|
||||
|
||||
|
||||
Figure 5\. The Genetic Laboratory allows you to play with the individual genes that make up an organism.
|
||||
|
||||
Right-clicking on a particular organism displays a drop-down menu that provides even more tools to work with. The first one allows you to track the selected organism as the world evolves. The next two entries allow you either to feed your organism extra food or weaken it. Normally, organisms need a certain amount of energy before they can reproduce. Selecting the fourth entry forces the selected organism to reproduce immediately, regardless of the energy level. You also can choose either to rejuvenate or outright kill the selected organism. If you want to increase the population of a particular organism quickly, simply copy and paste a number of a given organism.
|
||||
|
||||
Once you have a particularly interesting organism, you likely will want to be able to save it so you can work with it further. When you right-click an organism, one of the options is to export the organism to a file. This pops up a standard save dialog box where you can select the location and filename. The standard file ending for Biogenesis genetic code files is .bgg. Once you start to have a collection of organisms you want to work with, you can use them within a given world by right-clicking a blank location on the canvas and selecting the import option. This allows you to pull those saved organisms back into a world that you are working with.
|
||||
|
||||
Once you have allowed your world to evolve for a while, you probably will want to see how things are going. Clicking World→Statistics will pop up a new window where you can see what's happening within your world.
|
||||
|
||||
|
||||
|
||||
Figure 6\. The statistics window gives you a breakdown of what's happening within the world you have created.
|
||||
|
||||
The top of the window gives you the current statistics, including the time, the number of organisms, how many are dead, and the oxygen and carbon dioxide levels. It also provides a bar with the relative proportions of the genes.
|
||||
|
||||
Below this pane is a list of some remarkable organisms within your world. These are organisms that have had the most children, the most victims or those that are the most infected. This way, you can focus on organisms that are good at the traits you're interested in.
|
||||
|
||||
On the right-hand side of the window is a display of the world history to date. The top portion displays the history of the population, and the bottom portion displays the history of the atmosphere. As your world continues evolving, click the update button to get the latest statistics.
|
||||
|
||||
This software package could be a great teaching tool for learning about genetics, the environment and how the two interact. If you find a particularly interesting organism, be sure to share it with the community at the project website. It might be worth a look there for starting organisms too, allowing you to jump-start your explorations.
|
||||
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
via: http://www.linuxjournal.com/content/evolving-your-own-life-introducing-biogenesis
|
||||
|
||||
作者：[Joey Bernard][a]
|
||||
译者：[译者ID](https://github.com/译者ID)
|
||||
校对：[校对者ID](https://github.com/校对者ID)
|
||||
|
||||
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
|
||||
|
||||
[a]:http://www.linuxjournal.com/users/joey-bernard
|
||||
[1]:http://biogenesis.sourceforge.net
|
||||
@ -1,144 +0,0 @@
|
||||
translating by cncuckoo
|
||||
|
||||
Linux/Unix App For Prevention Of RSI (Repetitive Strain Injury)
|
||||
======
|
||||
![workrave-image][1]
|
||||
|
||||
[A repetitive strain injury][2] (RSI) is occupational overuse syndrome, non-specific arm pain or work related upper limb disorder. RSI caused from overusing the hands to perform a repetitive task, such as typing, writing, or clicking a mouse. Unfortunately, most people do not understand what RSI is or how dangerous it can be. You can easily prevent RSI using open source software called Workrave.
|
||||
|
||||
|
||||
### What are the symptoms of RSI?
|
||||
|
||||
I'm quoting from this [page][3]. Do you experience:
|
||||
|
||||
1. Fatigue or lack of endurance?
|
||||
2. Weakness in the hands or forearms?
|
||||
3. Tingling, numbness, or loss of sensation?
|
||||
4. Heaviness: Do your hands feel like dead weight?
|
||||
5. Clumsiness: Do you keep dropping things?
|
||||
6. Lack of strength in your hands? Is it harder to open jars? Cut vegetables?
|
||||
7. Lack of control or coordination?
|
||||
8. Chronically cold hands?
|
||||
9. Heightened awareness? Just being slightly more aware of a body part can be a clue that something is wrong.
|
||||
10. Hypersensitivity?
|
||||
11. Frequent self-massage (subconsciously)?
|
||||
12. Sympathy pains? Do your hands hurt when someone else talks about their hand pain?
|
||||
|
||||
|
||||
|
||||
### How to reduce your risk of Developing RSI
|
||||
|
||||
* Take breaks, when using your computer, every 30 minutes or so. Use software such as workrave to prevent RSI.
|
||||
* Regular exercise can prevent all sort of injuries including RSI.
|
||||
* Use good posture. Adjust your computer desk and chair to support muscles necessary for good posture.
|
||||
|
||||
|
||||
|
||||
### Workrave
|
||||
|
||||
Workrave is a free open source software application intended to prevent computer users from developing RSI or myopia. The software periodically locks the screen while an animated character, "Miss Workrave," walks the user through various stretching exercises and urges them to take a coffee break. The program frequently alerts you to take micro-pauses, rest breaks and restricts you to your daily limit. The program works under MS-Windows and Linux, UNIX-like operating systems.
|
||||
|
||||
#### Install workrave
|
||||
|
||||
Type the following [apt command][4]/[apt-get command][5] under a Debian / Ubuntu Linux:
|
||||
`$ sudo apt-get install workrave`
|
||||
Fedora Linux user should type the following dnf command:
|
||||
`$ sudo dnf install workrave`
|
||||
RHEL/CentOS Linux user should enable EPEL repo and install it using [yum command][6]:
|
||||
```
|
||||
### [ **tested on a CentOS/RHEL 7.x and clones** ] ###
|
||||
$ sudo yum install epel-release
|
||||
$ sudo yum install https://rpms.remirepo.net/enterprise/remi-release-7.rpm
|
||||
$ sudo yum install workrave
|
||||
```
|
||||
Arch Linux user type the following pacman command to install it:
|
||||
`$ sudo pacman -S workrave`
|
||||
FreeBSD user can install it using the following pkg command:
|
||||
`# pkg install workrave`
|
||||
OpenBSD user can install it using the following pkg_add command
|
||||
```
|
||||
$ doas pkg_add workrave
|
||||
```
|
||||
|
||||
#### How to configure workrave
|
||||
|
||||
Workrave works as an applet which is a small application whose user interface resides within a panel. You need to add workrave to panel to control behavior and appearance of the software.
|
||||
|
||||
##### Adding a New Workrave Object To Panel
|
||||
|
||||
* Right-click on a vacant space on a panel to open the panel popup menu.
|
||||
* Choose Add to Panel.
|
||||
* The Add to Panel dialog opens.The available panel objects are listed alphabetically, with launchers at the top. Select workrave applet and click on Add button.
|
||||
|
||||
![Fig.01: Adding an Object \(Workrave\) to a Panel][7]
|
||||
Fig.01: Adding an Object (Workrave) to a Panel
|
||||
|
||||
##### How Do I Modify Properties Of Workrave Software?
|
||||
|
||||
To modify the properties of an object workrave, perform the following steps:
|
||||
|
||||
* Right-click on the workrave object to open the panel object popup.
|
||||
* Choose Preference. Use the Properties dialog to modify the properties as required.
|
||||
|
||||
|
||||
Fig.02: Modifying the Properties of The Workrave Software
|
||||
|
||||
#### Workrave in Action
|
||||
|
||||
The main window shows the time remaining until it suggests a pause. The windows can be closed and you will the time remaining on the panel itself:
|
||||
![Fig.03: Time reaming counter ][8]
|
||||
Fig.03: Time reaming counter
|
||||
|
||||
![Fig.04: Miss Workrave - an animated character walks you through various stretching exercises][9]
|
||||
Fig.04: Miss Workrave - an animated character walks you through various stretching exercises
|
||||
|
||||
The break prelude window, bugging you to take a micro-pause:
|
||||
![Fig.05: Time for a micro-pause remainder ][10]
|
||||
Fig.05: Time for a micro-pause remainder
|
||||
|
||||
![Fig.06: You can skip Micro-break ][11]
|
||||
Fig.06: You can skip Micro-break
|
||||
|
||||
##### References:
|
||||
|
||||
1. [Workrave project][12] home page.
|
||||
2. [pokoy][13] lightweight daemon that helps prevent RSI and other computer related stress.
|
||||
3. [A Pomodoro][14] timer for GNOME 3.
|
||||
4. [RSI][2] from the wikipedia.
|
||||
|
||||
|
||||
|
||||
### about the author
|
||||
|
||||
The author is the creator of nixCraft and a seasoned sysadmin and a trainer for the Linux operating system/Unix shell scripting. He has worked with global clients and in various industries, including IT, education, defense and space research, and the nonprofit sector. Follow him on [Twitter][15], [Facebook][16], [Google+][17].
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
via: https://www.cyberciti.biz/tips/repetitive-strain-injury-prevention-software.html
|
||||
|
||||
作者：[Vivek Gite][a]
|
||||
译者：[译者ID](https://github.com/译者ID)
|
||||
校对：[校对者ID](https://github.com/校对者ID)
|
||||
|
||||
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
|
||||
|
||||
[a]:https://www.cyberciti.biz/
|
||||
[1]:https://www.cyberciti.biz/media/new/tips/2009/11/workrave-image.jpg (workrave-image)
|
||||
[2]:https://en.wikipedia.org/wiki/Repetitive_strain_injury
|
||||
[3]:https://web.eecs.umich.edu/~cscott/rsi.html##symptoms
|
||||
[4]:https://www.cyberciti.biz/faq/ubuntu-lts-debian-linux-apt-command-examples/ (See Linux/Unix apt command examples for more info)
|
||||
[5]:https://www.cyberciti.biz/tips/linux-debian-package-management-cheat-sheet.html (See Linux/Unix apt-get command examples for more info)
|
||||
[6]:https://www.cyberciti.biz/faq/rhel-centos-fedora-linux-yum-command-howto/ (See Linux/Unix yum command examples for more info)
|
||||
[7]:https://www.cyberciti.biz/media/new/tips/2009/11/add-workwave-to-panel.png (Adding an Object (Workrave) to a Gnome Panel)
|
||||
[8]:https://www.cyberciti.biz/media/new/tips/2009/11/screenshot-workrave.png (Workrave main window shows the time remaining until it suggests a pause.)
|
||||
[9]:https://www.cyberciti.biz/media/new/tips/2009/11/miss-workrave.png (Miss Workrave Sofrware character walks you through various RSI stretching exercises )
|
||||
[10]:https://www.cyberciti.biz/media/new/tips/2009/11/time-for-micro-pause.gif (Workrave RSI Software Time for a micro-pause remainder )
|
||||
[11]:https://www.cyberciti.biz/media/new/tips/2009/11/Micro-break.png (Workrave RSI Software Micro-break )
|
||||
[12]:http://www.workrave.org/
|
||||
[13]:https://github.com/ttygde/pokoy
|
||||
[14]:http://gnomepomodoro.org
|
||||
[15]:https://twitter.com/nixcraft
|
||||
[16]:https://facebook.com/nixcraft
|
||||
[17]:https://plus.google.com/+CybercitiBiz
|
||||
|
||||
1517810580494
|
||||
Loading…
Reference in New Issue
Block a user