Article directory
exit
Exit the current shell.
overview
exit [n]
The main purpose
Execute exitcauses the shell to exit with the specified status value. If no parameters are set, the return value of the last command will be used as exitthe return value to exit.
parameter
n(optional): Specified shell return value (integer).
return value
The return value is the value of the parameter you specify n. If the parameter you specify is greater than 255 or less than 0, then 256 will be added or subtracted so that the return value is always between 0 and 255.
example
Exit the current shell:
[root@localhost ~]# exit
logout
You can also use to ctrl+dexit the current terminal. Here is a list of ways to turn this feature on or off:
-
Open
ctrl+dand exit the terminal:set -o ignoreeof -
Close
ctrl+dand 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
Note:
This command is a built-in bash command. Please see the command for related help information help.
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