【脚本练习】shell脚本

#!/bin/sh
echo $#
if  [ $# != 3 ]
then
PROCESS_ID="$1"
PROCESS_NUM="$2"
nohup test ${PROCESS_ID} ${PROCESS_NUM} >/dev/null &
fi
if  [ $# != 2 ]
then
SERVCTRL="$1"
ps -ef | grep ${SERVCTRL} | grep `whoami` | grep -v grep
fi
if [ $# != 1 ]
then
ps -ef | grep `whoami` | grep pts | grep -v grep
fi
echo "end"

#!/bin/sh

2、if []里的=为判断符号，意为是否相等，语义与C语言相反 等号量变需要空格，而作为赋值则不能有空隔

3、if格式:

if空格[空格表达式空格];then

echo 'Do Something'

fi