[script]判定某一个脚本是否正确执行

返回内容存在$?, 0代表成功，其他代表失败

some_command
if [ $? -eq 0 ]; then
    echo OK
else
    echo FAIL
fi

字符型的返回值

some_command
retval=$?
do_something $retval
if [ $retval -ne 0 ]; then
    echo "Return code was not zero but $retval"
fi