Tag Archives: bash
There are times when you want to monitor the exit status through a whole pipeline of chained commands. But the default behavior of Bash is to show the exit status of the right-most (last) command in the pipe. This can a problem, specifically in scripting.
I prefer if the pipeline’s return status is the value of the last (rightmost) command to exit with a non-zero status, OR zero if all commands in the pipeline exit successfully.
This can be achieved by adding the following line to your script:
This can also be added to your ~/.bash_profile to make the change permanent.
Just a quick mentioning of some Bash hot-keys to make your life easier.
I use Vi/Vim as my editor, but prefer the Emacs hot-keys which is default in the Bash shell.
You can actually shift between Vi and Emacs hot-keys by executing:
The following hot-keys all work in Emacs mode:
|Key||Effect and memory hook|
|ctrl-l||clear the screen, lose all previous output|
|ctrl-c||abort current line (or the running process)|
|ctrl-r||search in history while typing|
|ctrl-e||jump to the end of the line|