编写Linux脚本

　　以下是重启linux下某进程的shell脚本，以tomcat进程为例：

　　#!/bin/sh

　　pid=`ps -ef|grep tomcat|grep -v grep|awk '{PRint $2}'`

　　if [ "$pid" = "" ] ; then

　　echo "tomcat service does not start!"

　　else

　　kill -9 $pid

　　pid1=`ps -ef|grep tomcat|grep -v grep|awk '{print $2}'`

　　if [ "$pid1" = "" ] ; then

　　echo "Successfully kill tomcat processes: " $pid

　　else

　　echo "tomcat kill process failed!"

　　exit 1

　　fi

　　fi

　　rm -rf /opt/tomcat/work/*

　　./startup.sh

　　pid2=`ps -ef|grep tomcat|grep -v grep|awk '{print $2}'`

　　if [ "$pid2" = "" ] ; then

　　echo "tomcat service failed to start!"

　　else

　　echo "tomcat service starts successfully:" $pid2

　　fi