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,