Alias command for Linux systems: using aliases

An alias is a shortcut that eliminates the hassle of users entering a long list of commands, and can unify windows, Linux, and Unix command differences to meet user input habits.

$ alias new_command= ' command sequence '

$ alias ll= ' Ls-al '

#此时设置的别名是暂时性的, once the terminal is closed, the alias set is invalidated and can be placed in the ~/.BASHRC file in order for the alias to remain valid. (Every time a new shell is generated, the commands in ~/.BASHRC are executed) as follows:

$ Echo ' Alias cmd= ' command seq ' >> ~/.BASHRC

If you want to remove the alias, simply delete the statement that corresponds to it, or use the Unalias command.

Note: When an alias is created, the original alias setting is replaced if an alias with the same name already exists.

Sometimes, aliases can also create security issues: In the context of mistrust, commands may have been disguised, may be stolen accounts, passwords and other important information.

Ways to avoid such problems: escaping aliases (before the command plus \)

$ \command

#字符 \ Escapes the command so that we can execute the original command rather than the command itself.

See more highlights of this column: http://www.bianceng.cnhttp://www.bianceng.cn/OS/Linux/