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选题: 20190320 Quickly Go Back To A Specific Parent Directory Using bd Command In Linux
sources/tech/20190320 Quickly Go Back To A Specific Parent Directory Using bd Command In Linux.md
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[#]: collector: (lujun9972)
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[#]: translator: ( )
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[#]: reviewer: ( )
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[#]: publisher: ( )
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[#]: url: ( )
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[#]: subject: (Quickly Go Back To A Specific Parent Directory Using bd Command In Linux)
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[#]: via: (https://www.2daygeek.com/bd-quickly-go-back-to-a-specific-parent-directory-in-linux/)
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[#]: author: (Magesh Maruthamuthu https://www.2daygeek.com/author/magesh/)
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Quickly Go Back To A Specific Parent Directory Using bd Command In Linux
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======
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Two days back we had written an article about autocd. It’s a builtin shell variable that helps us to **[navigate to inside a directory without cd command][1]**.
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If you want to come back to previous directory then you have to type `cd ..`.
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If you want to go back to two directories then you have to type `cd ../..`.
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It’s normal in Linux but if you want to come back from 9th directory to 3rd directory, then it’s horrible to use cd command.
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What will be the solution for this.
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Yes, we have a solution in Linux for everything. We can go with bd command, to make easy this kind of situation.
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### What Is bd Command?
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bd command allow users to quickly go back to a parent directory in Linux instead of typing `cd ../../..` repeatedly.
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You can list the contents of a given directory without mentioning the full path `ls `bd Directory_Name``. It supports following other commands such as ls, ln, echo, zip, tar etc..
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Also, it allow us to execute a shell file without mentioning the full path `bd p`/shell_file.sh`.
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### How To Install bd Command in Linux?
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There is no official distribution package for bd except Debian/Ubuntu. Hence, we need to perform manual method.
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For **`Debian/Ubuntu`** systems, use **[APT-GET Command][2]** or **[APT Command][3]** to install bd.
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```
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$ sudo apt install bd
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```
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For other Linux distributions.
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Download the bd executable binary file using **[wget command][4]**.
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```
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$ sudo wget --no-check-certificate -O /usr/local/bin/bd https://raw.github.com/vigneshwaranr/bd/master/bd
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```
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Set executable permission to the bd binary file.
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```
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$ sudo chmod +rx /usr/local/bin/bd
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```
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Append the below values in the `.bashrc` file.
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```
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$ echo 'alias bd=". bd -si"' >> ~/.bashrc
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```
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Run the following command to make the changes to take effect.
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```
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$ source ~/.bashrc
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```
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To enable auto completion, perform the following two steps.
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```
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$ sudo wget -O /etc/bash_completion.d/bd https://raw.github.com/vigneshwaranr/bd/master/bash_completion.d/bd
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$ sudo source /etc/bash_completion.d/bd
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```
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We have successfully installed and configured the bd utility on the system. It’s time to test it.
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I’m going to take the below directory path for this testing.
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Run the `pwd` command or `dirs` command or `tree` command to know your current location.
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```
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daygeek@Ubuntu18:/usr/share/icons/Adwaita/256x256/apps$ pwd
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or
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daygeek@Ubuntu18:/usr/share/icons/Adwaita/256x256/apps$ dirs
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/usr/share/icons/Adwaita/256x256/apps
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```
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I’m currently in `/usr/share/icons/Adwaita/256x256/apps` and if i want to go to `icons` directory quickly then simple type the following command.
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```
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daygeek@Ubuntu18:/usr/share/icons/Adwaita/256x256/apps$ bd icons
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/usr/share/icons/
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daygeek@Ubuntu18:/usr/share/icons$
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```
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Even, you no need to type full directory name instead you can type few letters.
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```
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daygeek@Ubuntu18:/usr/share/icons/Adwaita/256x256/apps$ bd i
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/usr/share/icons/
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daygeek@Ubuntu18:/usr/share/icons$
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```
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`Note:` If there are more than one directories with same name up in the hierarchy, bd will take you to the closest. (Not considering the immediate parent.)
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If you would like to list a given directory contents then the following format. It prints the contents of `/usr/share/icons/`.
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```
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$ ls -lh `bd icons`
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or
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daygeek@Ubuntu18:/usr/share/icons/Adwaita/256x256/apps$ ls -lh `bd i`
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total 64K
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drwxr-xr-x 12 root root 4.0K Jul 25 2018 Adwaita
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lrwxrwxrwx 1 root root 51 Feb 25 14:32 communitheme -> /snap/communitheme/current/share/icons/communitheme
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drwxr-xr-x 2 root root 4.0K Jul 25 2018 default
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drwxr-xr-x 3 root root 4.0K Jul 25 2018 DMZ-Black
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drwxr-xr-x 3 root root 4.0K Jul 25 2018 DMZ-White
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drwxr-xr-x 9 root root 4.0K Jul 25 2018 gnome
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drwxr-xr-x 3 root root 4.0K Jul 25 2018 handhelds
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drwxr-xr-x 20 root root 4.0K Mar 9 14:52 hicolor
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drwxr-xr-x 9 root root 4.0K Jul 25 2018 HighContrast
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drwxr-xr-x 12 root root 4.0K Jul 25 2018 Humanity
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drwxr-xr-x 7 root root 4.0K Jul 25 2018 Humanity-Dark
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drwxr-xr-x 4 root root 4.0K Jul 25 2018 locolor
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drwxr-xr-x 3 root root 4.0K Feb 25 15:46 LoginIcons
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drwxr-xr-x 3 root root 4.0K Jul 25 2018 redglass
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drwxr-xr-x 10 root root 4.0K Feb 25 15:46 ubuntu-mono-dark
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drwxr-xr-x 10 root root 4.0K Feb 25 15:46 ubuntu-mono-light
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drwxr-xr-x 3 root root 4.0K Jul 25 2018 whiteglass
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```
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If you want to execute a file somewhere in a parent directory then use the following format. It will run the following shell file `/usr/share/icons/users-list.sh`.
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```
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$ `bd i`/users-list.sh
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or
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daygeek@Ubuntu18:/usr/share/icons/Adwaita/256x256/apps$ `bd icon`/users-list.sh
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daygeek
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thanu
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renu
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2gadmin
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testuser
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demouser
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sudha
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suresh
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user1
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user2
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user3
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```
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If you reside in `/usr/share/icons/Adwaita/256x256/apps` and would you like to navigate to different parent directory then use the following format. The below command will navigate to `/usr/share/icons/gnome` directory.
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```
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$ cd `bd i`/gnome
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or
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daygeek@Ubuntu18:/usr/share/icons/Adwaita/256x256/apps$ cd `bd icon`/gnome
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daygeek@Ubuntu18:/usr/share/icons/gnome$
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```
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If you reside in `/usr/share/icons/Adwaita/256x256/apps` and would you like to create a new directory under `/usr/share/icons/` then use the following format.
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```
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$ daygeek@Ubuntu18:/usr/share/icons/Adwaita/256x256/apps$ sudo mkdir `bd icons`/2g
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daygeek@Ubuntu18:/usr/share/icons/Adwaita/256x256/apps$ ls -ld `bd icon`/2g
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drwxr-xr-x 2 root root 4096 Mar 16 05:44 /usr/share/icons//2g
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```
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This tutorial allows you to quickly go back to a specific parent directory but there is no option to move forward quickly.
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We have another solution for this, will come up with new solution shortly. Please stay tune with us.
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--------------------------------------------------------------------------------
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via: https://www.2daygeek.com/bd-quickly-go-back-to-a-specific-parent-directory-in-linux/
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作者：[Magesh Maruthamuthu][a]
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选题：[lujun9972][b]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://www.2daygeek.com/author/magesh/
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[b]: https://github.com/lujun9972
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[1]: https://www.2daygeek.com/navigate-switch-directory-without-using-cd-command-in-linux/
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[2]: https://www.2daygeek.com/apt-get-apt-cache-command-examples-manage-packages-debian-ubuntu-systems/
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[3]: https://www.2daygeek.com/apt-command-examples-manage-packages-debian-ubuntu-systems/
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[4]: https://www.2daygeek.com/wget-command-line-download-utility-tool/
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