标签：linux shell
[root@oldboy C07]# cat 7_1.sh#!/bin/bashif [ -f /etc/hosts ] then echo "[1]"fiif [[ -f /etc/hosts ]] then echo "[[1]]"fiif test -f /etc/hosts then echo "test1"fi[root@oldboy C07]# cat 7_2.sh#!/bin/bashFreeMem=`free -m|awk ‘NR==3 {print $NF}‘`CHARS="Current memory is $FreeMem."if [ $FreeMem -lt 1000 ] then echo $CHARS|tee /tmp/messages.txt #mail -s "`date +%F-%T`$CHARS" 490004487@qq.com </tmp/messages.txtfiif (($FreeMem<1000)) then echo $CHARS|tee /tmp/messages.txt #mail -s "`date +%F-%T`$CHARS" 490004487@qq.com </tmp/messages.txtfiif [[ $FreeMem -lt 1000 ]] then echo $CHARS|tee /tmp/messages.txt #mail -s "`date +%F-%T`$CHARS" 490004487@qq.com </tmp/messages.txtfiif test $FreeMem -lt 1000 then echo $CHARS|tee /tmp/messages.txt #mail -s "`date +%F-%T`$CHARS" 490004487@qq.com </tmp/messages.txtfi[root@oldboy C07]# cat 7_3_1.sh#!/bin/shread -p "pls input two num:" a bif [ $a -lt $b ];then echo "yes,$a less than $b" exit 0fiif [ $a -eq $b ];then echo "yes,$a equal $b" exit 0fiif [ $a -gt $b ];then echo "yes,$a greater than $b" exit 0fi[root@oldboy C07]# cat 7_3_2.sh#!/bin/shread -p "pls input two num:" a bif [ $a -lt $b ];then echo "yes,$a less than $b"elif [ $a -eq $b ];then echo "yes,$a equal $b"else [ $a -gt $b ] echo "yes,$a greater than $b"fi[root@oldboy C07]# cat 7_3_3.sh#!/bin/sha=$1b=$2#read -p "pls input two num:" a bif [ $a -lt $b ];then echo "yes,$a less than $b" exit 0fiif [ $a -eq $b ];then echo "yes,$a equal $b" exit 0fiif [ $a -gt $b ];then echo "yes,$a greater than $b" exit 0fi[root@oldboy C07]# cat 7_3_4.sh#!/bin/sha=$1b=$2#read -p "pls input two num:" a bif [ $a -lt $b ];then echo "yes,$a less than $b"elif [ $a -eq $b ];then echo "yes,$a equal $b"else [ $a -gt $b ] echo "yes,$a greater than $b"fi[root@oldboy C07]# cat 7_4_1.sh#!/bin/shecho method1-------------------if [ `netstat -lnt|grep 3306|awk -F "[ :]+" ‘{print $5}‘` -eq 3306 ]then echo "MySQL is Running."else echo "MySQL is Stopped." /etc/init.d/mysqld startfiecho method2-------------------if [ "`netstat -lnt|grep 3306|awk -F "[ :]+" ‘{print $5}‘`" = "3306" ]then echo "MySQL is Running."else echo "MySQL is Stopped." /etc/init.d/mysqld startfiecho method3-------------------if [ `netstat -lntup|grep mysqld|wc -l` -gt 0 ]then echo "MySQL is Running."else echo "MySQL is Stopped." /etc/init.d/mysqld startfiecho method4-------------------if [ `lsof -i tcp:3306|wc -l` -gt 0 ]then echo "MySQL is Running."else echo "MySQL is Stopped." /etc/init.d/mysqld startfiecho method5-------------------[ `rpm -qa nmap|wc -l` -lt 1 ] && yum install nmap -y &>/dev/nullif [ `nmap 127.0.0.1 -p 3306 2>/dev/null|grep open|wc -l` -gt 0 ] then echo "MySQL is Running."else echo "MySQL is Stopped." /etc/init.d/mysqld startfiecho method6-------------------[ `rpm -qa nc|wc -l` -lt 1 ] && yum install nc -y &>/dev/nullif [ `nc -w 2 127.0.0.1 3306 &>/dev/null&&echo ok|grep ok|wc -l` -gt 0 ] then echo "MySQL is Running."else echo "MySQL is Stopped." /etc/init.d/mysqld startfiecho method7-------------------if [ `ps -ef|grep -v grep|grep mysql|wc -l` -ge 1 ] then echo "MySQL is Running."else echo "MySQL is Stopped." /etc/init.d/mysqld startfi[root@oldboy C07]# cat 7_4_2.sh#!/bin/shecho http method1-------------------if [ `netstat -lnt|grep 80|awk -F "[ :]+" ‘{print $5}‘` -eq 80 ] then echo "Nginx is Running."else echo "Nginx is Stopped." /etc/init.d/nginx startfiecho http method2-------------------if [ "`netstat -lnt|grep 80|awk -F "[ :]+" ‘{print $5}‘`" = "80" ] then echo "Nginx is Running."else echo "Nginx is Stopped." /etc/init.d/nginx startfiecho http method3-------------------if [ `netstat -lntup|grep nginx|wc -l` -gt 0 ] then echo "Nginx is Running."else echo "Nginx is Stopped." /etc/init.d/nginx startfiecho http method4-------------------if [ `lsof -i tcp:80|wc -l` -gt 0 ] then echo "Nginx is Running."else echo "Nginx is Stopped." /etc/init.d/nginx startfiecho http method5-------------------[ `rpm -qa nmap|wc -l` -lt 1 ] && yum install nmap -y &>/dev/nullif [ `nmap 127.0.0.1 -p 80 2>/dev/null|grep open|wc -l` -gt 0 ] then echo "Nginx is Running."else echo "Nginx is Stopped." /etc/init.d/nginx startfiecho http method6-------------------[ `rpm -qa nc|wc -l` -lt 1 ] && yum install nc -y &>/dev/nullif [ `nc -w 2 127.0.0.1 80 &>/dev/null&&echo ok|grep ok|wc -l` -gt 0 ] then echo "Nginx is Running."else echo "Nginx is Stopped." /etc/init.d/nginx startfiecho http method7-------------------if [ `ps -ef|grep -v grep|grep nginx|wc -l` -ge 1 ] then echo "Nginx is Running."else echo "Nginx is Stopped." /etc/init.d/nginx startfiecho http method8-------------------if [[ `curl -I -s -o /dev/null -w "%{http_code}\n" http://127.0.0.1` =~ [23]0[012] ]] then echo "Nginx is Running."else echo "Nginx is Stopped." /etc/init.d/nginx startfiecho http method9-------------------if [ `curl -I http://127.0.0.1 2>/dev/null|head -1|egrep "200|302|301"|wc -l` -eq 1 ] then echo "Nginx is Running."else echo "Nginx is Stopped." /etc/init.d/nginx startfiecho http method10-------------------if [ "`curl -s http://127.0.0.1`" = "oldboy" ] then echo "Nginx is Running."else echo "Nginx is Stopped." /etc/init.d/nginx startfi[root@oldboy C07]# cat 7_6.sh#!/bin/basha=$1b=$2#no.1 judge arg nums.if [ $# -ne 2 ];then echo "USAGE:$0 arg1 arg2" exit 2fi#no.2 judge if intexpr $a + 1 &>/dev/nullRETVAL1=$?expr $b + 1 &>/dev/nullRETVAL2=$?if [ $RETVAL1 -ne 0 -a $RETVAL2 -ne 0 ];then echo "please input two int again" exit 3fiif [ $RETVAL1 -ne 0 ];then echo "The first num is not int,please input again" exit 4fiif [ $RETVAL2 -ne 0 ];then echo "The second num is not int,please input again" exit 5fi#no.3 compart two num.if [ $a -lt $b ];then echo "$a<$b"elif [ $a -eq $b ];then echo "$a=$b"else echo "$a>$b"fi[root@oldboy C07]# cat 7_9.sh#!/bin/shif [ $# -ne 1 ] then echo $"usage:$0{start|stop|restart}" exit 1fiif [ "$1" = "start" ] then rsync --daemon if [ `netstat -lntup|grep rsync|wc -l` -ge 1 ] then echo "rsyncd is started." exit 0 fielif [ "$1" = "stop" ] then pkill rsync if [ `netstat -lntup|grep rsync|wc -l` -eq 0 ] then echo "rsyncd is stopped." exit 0 fielif [ "$1" = "restart" ] then pkill rsync sleep 2 rsync --daemonelse echo $"usage:$0{start|stop|restart}" exit 1fi标签：linux shell
原文地址：http://132408.blog.51cto.com/122408/1917188
