bash 通过 SSH 执行命令时不能使用别名
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Cannot use alias while executing a command via SSH
提问by davidhq
I commented out this line in .bashrc:
我在 .bashrc 中注释掉了这一行：
# [ -z "$PS1" ] && return
and now the alias gets read, but I still cannot execute it... :/
现在别名被读取，但我仍然无法执行它......：/
We can ask the server if the alias has been defined:
我们可以询问服务器是否已经定义了别名：
$ ssh server "cd /tmp && alias backup_tb"
alias backup_tb='pg_dump -U david tb > tb.sql'
But it is not expanded:
但它没有扩展：
$ ssh server "cd /tmp && backup_tb"
bash: backup_tb: command not found
Any ideas?
有任何想法吗？
回答by stanleyxu2005
Quoted from the man page of bash: Aliases are not expanded when the shell is not interactive, unless the expand_aliases shell option is set using shopt ...
引自手册页bash：当 shell 不是交互式时，别名不会扩展，除非使用 shopt 设置 expand_aliases shell 选项...
So the simplest way IMO is to put the following lines at the top of your /home/<user>/.bashrcfile:
因此，IMO 最简单的方法是将以下几行放在/home/<user>/.bashrc文件的顶部：
# comment out the original line
# [ -z "$PS1" ] && return
if [ -z "$PS1" ]; then
shopt -s expand_aliases
# alias ls='ls --color=always'
# return
fi
Save and exit. Now you can run ssh user@host "your_alias"successfully.
保存并退出。现在你可以ssh user@host "your_alias"成功运行了。
回答by yekirihi
# WARNING!!!! Just effective in openssh-server.!!!!!!!
# cd your loacl user .ssh path
# if you want to make all user has the same alias you should go to
#'/etc/ssh' touch a file 'sshrc'
# what is 'sshrc'? he has the same function as 'rc.local',just a shell
# script when you first login.
# The following is a configuration of the current user .
cd ~/.ssh
touch sshrc
chmod +x sshrc
#edit sshrc and type
alias ll="ls -lah --color"
#Apply changes
source sshrc
