[Shell]bad substitution

Source: Internet
Author: User

There was a bug when I wrote a shell script recently

#!/bin/sh
Right=disk1
PART=${RIGHT//[A-ZA-Z]}

Tips:
Bad substitution
At the command-line input, it is running correctly.

Checked the next someone said to change SH to bash, found the problem solved. #!/bin/bash is the compatibility problem with different command interpreters, which is actually running bash under Ubuntu's shell. And/bin/sh is the soft link to dash.
This is why using the. SH script generates an error, while the shell command line does not.

[Shell]bad substitution

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