I tried command
which is stated that (By the way, these two options are particularly useful when you are testing or debugging a shell script.)
$ bash -vx ++ prompt_git ' on ' bash: prompt_git: command not found
After this command,
bash: prompt_git: command not found is append to the output of every command:
$ uptime uptime + uptime 17:18:51 up 7:54, 2 users, load average: 3.62, 4.03, 2.94 ++ prompt_git ' on ' bash: prompt_git: command not found
How to set `prompt-git' off.
What's the reverse operation of