Bash and Its Features

Bash and Its Features: shell: # shell Gui: # gnome, Kde, xfcegli: # SH, CSH, KSh, Bash, tcsh, KSh (clone version), zsh

Bash: 1. # command history, command completion, and path completion 2. # pipelines, redirection 3. # command alias 4. # command line editing 5. # command line expansion 6. # file name configuration 7 # variable 8 and # programming (shell script) supported)

Command Line Editing: Jump to the cursor: Ctrl + A: # Jump to the beginning of the command line Ctrl + E: # jump to the end of the command line Ctrl + u: # Delete the cursor to the beginning of the command line content Ctrl + K: # Delete the cursor to the end of the command line content Ctrl + L: # clear screen (clear)

Command history: History: # view command history-C: # Clear command history-D offset [N]: # DELETE command at a specified position-W: # Save command history to history files

Environment variable: Path: # command search path histsize: # command history buffer size

Command history tips :! N: # the nth command in the execution history! -N: # the nth command in the execution history !! : # Run the previous command :! : # The latest command starting with a specified string in the execution command history! $: # Reference the last parameter ESC,.: # reference the last parameter of the previous command

Command completion: # search for executable files starting with the given string in each path specified by the PATH environment variable. If there is more than one or two tables, a list can be provided: otherwise, complete the path directly: # search for each file name in the starting path and try to complete it;

Command alias: alias CLS = clear # the alias defined in shell is valid only in the current shell lifecycle; the alias is valid only in the Current Shell Process unalias: # cancel alias Definition

Command replacement: $ (command). The backquotes 'command' # Replace a subcommand with the execution result.

Bash supports quotation marks: '': # command replacement" ": # weak reference. You can replace the variable'': # Strong reference. If you do not replace the variable with the file name, you can replace it with globbing ): *: # Any characters of any length? : # Any single character []: # match any single character in the specified range [ABC], [a-m], [A-Z], [0-9], [A-Za-Z], [0-9a-za-z] [[: Space:]: # blank character [[: punct:]: # punctuation [[: lower:]: # lowercase letter [[: Upper:]: # upper-case letter [[: Alpha:]: # upper-case letter [[: digit:]: # number [[: alnum:]: # numbers and uppercase/lowercase letters [^]: # match any single character out of the specified range

This article from the "Linux O & M" blog, please be sure to keep this source http://linuxdarker.blog.51cto.com/8340258/1548215

Bash and Its Features