[Personal memo] Auto-completion of bash

Overview

Longer Linux commands can be tedious and inefficient So, I'll leave the procedure for setting auto-completion of commands.

Introduction method

1. Install bash-completion

   > yum install -y bash-completion
   

2. Load & Confirm

   > source /usr/share/bash-completion/bash_completion
   
   #OK if there are no errors
   > type _init_completion
   

3. As an example, input completion setting of yum command

   > source /usr/share/bash-completion/completions/yum
   
   #After inputting yum, if the input completion is displayed with the tab key as shown below, it is OK
   > yum 
     check  deplist  groups  info  load-transaction  reinstall  search  upgrade
     check-update   distro-sync   help   install  makecache   remove   shell  version
     clean   downgrade   history    list   provides     repolist   update 
   

• Various input completion scripts will be installed under / usr / share / bash-completion / completions /, so load them as needed.

4. What if it's not in / usr / share / bash-completion / completions /? Some things are built into the command. For example, in the case of kubectl, kubectl completion bash provides the completion function. In the case of docker-compose, install the auto-completion script according to this procedure and load it in the same way. So please find the one you want to complement and load it.

5. Automatic load registration

 > echo 'source /usr/share/bash-completion/bash_completion' >> ~/.bashrc
 > echo 'source /usr/share/bash-completion/yum' >> ~/.bashrc

When _get_comp_words_by_ref command not found is displayed

Try the following two

bash_completion is not loaded

Execute "2. Load & Confirm" above

bash_completion is not installed

Install bash-completion from your package manager

Execute "1. Install bash-completion" above