Bash script skills-trap Command, bash script-trap

Bash script skills-trap Command, bash script-trap

Share a shell script technique. When you write a shell script, you generally only ensure that the function is available, but the program is not very robust and not robust enough. Most of them are script processing.

The built-in trap command can handle unexpected system signals, for example:

Trap "rm-f/var/lock/subsys/my_program_lock_file; Exit 0 "1 2 9 15

To put it simply, the script in the quotation marks (delete the lock file and exit) is executed when the signal 1, 2, 9, 15 is captured. What is the specific system signal? Trap-lView