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00. Contents
Article Directory
01. Command Overview
unalias command to delete command aliases, is a built-in command shell. If you need to cancel any command alias, use the alias command parameter options can be used as instruction. If you use the -a option, then cancel all existing command aliases.
02. Command Format
用法:unalias [-a] 名称 [名称 ...]
03. Common Options
-a 删除所有的别名定义.
04. Reference Example
4.1 Cancellation alias
[deng@localhost ~]$ alias lxx='ls -lh'
[deng@localhost ~]$ lxx
总用量 55M
drwxrwxr-x 7 deng deng 61 1月 22 2019 bak
drwxrwxr-x 8 deng deng 73 3月 28 11:14 bj34
drwxr-xr-x 4 deng deng 4.0K 8月 16 11:10 instantclient_11_2
-rwxrwxr-x 1 deng deng 55M 1月 22 2019 oracle_client_11gR2.tar.gz
drwxrwxr-x 3 deng deng 18 1月 22 2019 oradiag_deng
drwxrwxr-x 10 deng deng 163 9月 1 16:05 projects
-rwxrwxr-x 1 deng deng 2.1K 6月 30 15:14 scott_data.sql
drwxrwxr-x 6 deng deng 50 9月 1 09:38 share
drwxrwxr-x 8 deng deng 73 3月 10 09:16 sz12
-rwxrwxr-x 1 deng deng 599 8月 27 09:56 test.c
-rwxrwxr-x 1 deng deng 1.7K 8月 3 15:05 test.cpp
-rwxrwxr-x 1 deng deng 199 9月 1 19:50 test.sh
-rw-rw-r-- 1 deng deng 13 9月 1 19:22 txt
drwxr-xr-x. 2 deng deng 6 11月 8 2018 公共
drwxr-xr-x. 2 deng deng 6 11月 8 2018 模板
drwxr-xr-x. 2 deng deng 6 11月 8 2018 视频
drwxr-xr-x. 2 deng deng 6 11月 8 2018 图片
drwxr-xr-x. 2 deng deng 6 11月 8 2018 文档
drwxr-xr-x. 2 deng deng 6 11月 8 2018 下载
drwxr-xr-x. 2 deng deng 6 11月 8 2018 音乐
drwxr-xr-x. 2 deng deng 6 7月 25 22:10 桌面
[deng@localhost ~]$ unalias lxx
[deng@localhost ~]$ lxx
bash: lxx: 未找到命令...
[deng@localhost ~]$
4.2 Delete all aliases
[deng@localhost ~]$ unalias -a
[deng@localhost ~]$
05. Appendix
Reference: [Linux] step by step tutorials to learn Linux Summary