exit

Exit the current shell.

Summary

exit[n]

The main purpose

Parameters

n (optional): Specified shell return value (integer).

return value

The return value is the value of the parameter n you specify. If the parameter you specify is greater than 255 or less than 0, then the return value will always be between 0 and 255 by adding or subtracting 256.

example

Exit the current shell:

[root@localhost ~]# exit
logout

You can also use ctrl+d to exit the current terminal. The following is a list of ways to turn this feature on or off:

#Open ctrl+d to exit the terminal
set -o ignoreeof
#Close ctrl+d to exit the terminal
set +o ignoreeof

In the script, enter the directory where the script is located, otherwise exit:

cd $(dirname $0) || exit 1

In the script, determine the number of parameters, print the usage method if they do not match, and exit:

if [ "$#" -ne "2" ]; then
     echo "usage: $0 <area> <hours>"
     exit 2
fi

In the script, delete the temporary files on exit:

trap "rm -f tmpfile; echo Bye." EXIT

Check the exit code of the previous command:

./mycommand.sh
EXCODE=$?
if [ "$EXCODE" == "0" ]; then
     echo "O.K"
fi