diff --git a/sources/Glances – An Advanced Real Time System Monitoring Tool for Linux.md b/sources/Glances – An Advanced Real Time System Monitoring Tool for Linux.md deleted file mode 100644 index 31b64d9d8b..0000000000 --- a/sources/Glances – An Advanced Real Time System Monitoring Tool for Linux.md +++ /dev/null @@ -1,139 +0,0 @@ -Glances – An Advanced Real Time System Monitoring Tool for Linux -================================================================================ -Earlier, we’ve written about many Linux [System Monitor Tools][1] that can be used to monitor performance of Linux systems, but we think that, most users prefer the default one that comes with every Linux distributions (**top** command). - -The [top command][2] is real time task manager in Linux and the most frequently used system monitoring tool in **GNU/Linux** distributions to find the performance related bottlenecks in system which help us to take corrective actions. It has a nice minimalist interface, comes with few amount of reasonable options that enables us to get a better idea about overall system performance quickly. - -However, sometimes its very tricky to find an application/process that consuming lots of system resources is a bit difficult under top. Because top command doesn’t have a ability to highlights programs that are eating too much of **CPU**, **RAM**, other resources. - -For keeping such approach, here we are bringing a powerful system monitor program called “**Glances**” that automatically highlights programs that are utilizing highest system resources and providing maximum of information about Linux/Unix server. - -### What is Glances? ### - -**Glances** is a cross-platform command-line curses-based system monitoring tool written in **Python** language which use the **psutil** library to grab informations from the system. With Glance, we can monitor **CPU, Load Average, Memory, Network Interfaces, Disk I/O, Processes** and **File System** spaces utilization. - -Glances is a free tool and licensed under **GPL** to monitory **GNU/Linux** and **FreeBSD** operating systems. There are lots of interesting options available in Glances as well. One of the main features we have seen in Glances is that we can set thresholds (**careful**, **warning** and **critical**) in configuration file and informations will be shown in colors which indicates the bottleneck in the system. - -### Glances Features ### - -- CPU Informations (user related applications, system core programs and idle programs. -- Total memory Information including RAM, Swap, Free memory etc. -- The average CPU load for the past 1min, 5mins and 15 mins. -- Network Download/Upload rates of network connections. -- Total number of processes, active ones, sleeping processes etc. -- Disk I/O related (read or write) speed details -- Currently mounted devices disk usages. -- Top processes with their CPU/Memory usages, Names and location of application. -- Shows the current date and time at bottom. -- Highlights processes in Red that consumes highest system resources. - -Here is an example screen grab of Glances. - -![Glances View](http://www.tecmint.com/wp-content/uploads/2014/02/Glances-Monitoring.jpeg) - -### Installation of Glances in Linux/Unix Systems ### - -Although it’s a very young utility, you can install “**Glances**” in **Red Hat** based systems by turning on [EPEL repository][3] and then run the following command on the terminal. - -#### On RHEL/CentOS/Fedora #### - - # yum install -y glances - -#### On Debian/Ubuntu/Linux Mint #### - - $ sudo apt-add-repository ppa:arnaud-hartmann/glances-stable - $ sudo apt-get update - $ sudo apt-get install glances - -### Usage of Glances ### - -To start, issue the basic syntax on the terminal. - - # glances - -![Glances Preview – Ubuntu 13.10](http://www.tecmint.com/wp-content/uploads/2014/02/Glances-Screen.jpeg) - -Press ‘**q**‘ or (‘**ESC**‘ or ‘**Ctrl&C**‘ also works) to quit from Glances terminal. Here, is the another screen grab taken from the **CentOS 6.5** system. - -![Glances Preview – CentOS 6.5](http://www.tecmint.com/wp-content/uploads/2014/02/Glances-Screen-Centos.jpeg) - -y default, interval time is set to ’**1**‘ second. But you can define the custom interval time while running glances from the terminal. - - # glances -t 2 - -### Glances Color Codes ### - -Meaning of Glances color code: - -- GREEN: OK (everything is fine) -- BLUE: CAREFUL (need attention) -- VIOLET: WARNING (alert) -- RED: CRITICAL (critical) - -We can set thresholds in configuration file. By default thresholds set is (**careful=50, warning=7**0 and **critical=90**), we can customized as per our needs. The default configuration file is located at ‘**/etc/glances/glances.conf**’. - -### Glances Options ### - -Besides, several command line options, glances provides many more **hot keys** to find output information while glances is running. Below are the list of several hot keys. - -- a – Sort processes automatically -- c – Sort processes by CPU% -- m – Sort processes by MEM% -- p – Sort processes by name -- i – Sort processes by I/O rate -- d – Show/hide disk I/O stats ols -- f – Show/hide file system statshddtemp -- n – Show/hide network stats -- s – Show/hide sensors stats -- y – Show/hide hddtemp stats -- l – Show/hide logs -- b – Bytes or bits for network I/Oools -- w – Delete warning logs -- x – Delete warning and critical logs -- x – Delete warning and critical logs -- 1 – Global CPU or per-CPU stats -- h – Show/hide this help screen -- t – View network I/O as combination -- u – View cumulative network I/O -- q – Quit (Esc and Ctrl-C also work) - -### Use Glances on Remote Systems ### - -With the Glances, you can even monitor remote systems too. To use ‘**glances**‘ on remote systems, run the ‘**glances -s**‘ (-s enables server/client mode) command on the server. - - # glances -s - - Define the password for the Glances server - Password: - Password (confirm): - Glances server is running on 0.0.0.0:61209 - -**Note** : Once, you issue ‘**glances**‘ command, it will prompt you to define the password for the Glances server. Define the password and hit enter, you see glances running on port **61209**. - -Now, go to the remote host and execute the following command to connect to a Glances server by specifying IP address or hostname as shown below. Here ‘**172.16.27.56**‘ is my glances server IP Address. - - # glances -c -P 172.16.27.56 - -Below are few notable points that user must know while using glances in server/client mode. - - * In server mode, you can set the bind address -B ADDRESS and listening TCP port -p PORT. - * In client mode, you can set the TCP port of the server -p PORT. - * Default binding address is 0.0.0.0, but it listens on all network interfaces at port 61209. - * In server/client mode, limits are set by the server side. - * You can also define a password to access to the server -P password. - -### Conclusion ### - -**Glances** is a much resources friendly tool for most users. But if you’re a system administrator who’d like to quickly get overall “idea” about systems by just glancing at command line, then this tool will be must have tool for system administrators. - --------------------------------------------------------------------------------- - -via: http://www.tecmint.com/glances-an-advanced-real-time-system-monitoring-tool-for-linux/ - -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) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出 - -[1]:http://www.tecmint.com/command-line-tools-to-monitor-linux-performance/ -[2]:http://www.tecmint.com/12-top-command-examples-in-linux/ -[3]:http://www.tecmint.com/how-to-enable-epel-repository-for-rhel-centos-6-5/ \ No newline at end of file