通過SSH執行命令時無法使用別名

Question

我在.bashrc中注釋掉了這一行：

# [ -z "$PS1" ] && return

現在別名被讀取，但我仍然無法執行...：/

我們可以詢問服務器是否已定義別名：

$ ssh server "cd /tmp && alias backup_tb"
alias backup_tb='pg_dump -U david tb > tb.sql'

但它沒有擴大：

$ ssh server "cd /tmp && backup_tb"
bash: backup_tb: command not found

有任何想法嗎？

Answer 1

引自bash的手冊頁： 當shell不是交互式時，別名不會被展開，除非使用shopt設置了expand_aliases shell選項...

因此，最簡單的方法是將以/home/<user>/.bashrc放在/home/<user>/.bashrc文件的頂部：

# comment out the original line
# [ -z "$PS1" ] && return

if [ -z "$PS1" ]; then
  shopt -s expand_aliases
  # alias ls='ls --color=always'
  # return
fi

保存並退出。 現在您可以成功運行ssh user@host "your_alias" 。

Answer 2

# 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