Shulou(Shulou.com)06/02 Report--

Recently, when I used Bash on Ubuntu on Windows to debug the shell script, I found that I would report an error when using source in the script. After checking the Internet, I realized that it was not bash that was used in Ubuntu, but the optimized dash was used. There is no source in dash, but there is only source in bash. This is a bit troublesome. Usually, when writing scripts, I sometimes call the function of the system and some custom function. It is really a bit inconvenient without source. At this point, you can use dpkg-reconfigure to modify the configuration of dash. You can use the following methods to verify the shell environment used in your system:

Root@localhost:~# ls-l $(which sh) lrwxrwxrwx 1 root root 4 September 9 22:09 / bin/sh-> dash

Modify:

Root@localhost:~# dpkg-reconfigure dash

Then choose No. If you look at the shell environment used in the system at this time, it will be changed to bash.

Root@localhost:~# ls-l $(which sh) lrwxrwxrwx 1 root root 4 September 9 22:09 / bin/sh-> bash

You can use source at this time. Of course, if you do not want to change the default settings in the system, you can also write scripts using the correctly defined shell environment, or simply use the env command in the system to let the system find the correct shell environment:

#! / bin/env bash

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