shell demo 小例子

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这些shell小程序都是自己上网找的一些和自己平时写的一点，和大家分享一下

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我起的名字是createShell，可以加到/bin路径下，以后在写shell脚本时直接使用可以生成一些注释信息 #usage： $0 shellFileName #!/bin/bash #生成文件名，如果没有传入参数就以当前时间为名称 if [ -z "${1}" ];then mtime="`date +%T| sed 's/\:/\-/g'`" newfile="${mtime}.sh" else newfile="${1}.sh" fi #判断该文件是否存在，当不存在就生成该文件 if ! grep "^#!" ${newfile} &> /dev/null;then cat >> ${newfile} <<EOF #!/bin/bash #Author: leo #Date: `date +"%F %T"` #Description: EOF fi vim +6 ${newfile} 得到当前局域网内的电脑开机状态(c类网址) #!/bin/bash #Author: leo #Date: 2017-06-05 22:17:20 #Description: ping ip from 1 to 255 read -p "C NETWORK: " MYNET PINGNET=`echo ${MYNET} | sed 's/\([0-9.]*\)\.[0-9]*/\1/g' ` let I=1 while [ ${I} -le 254 ] do ping -c1 -W1 ${PINGNET}.${I} &> /dev/null [ $? -eq 0 ] && echo "${PINGNET}.${I} online :)" || echo "${PINGNET}.${I} offline :(" let I++ done 打印出输入多个文件中空行的数目 #usage： $0 $1...$n #!/bin/bash #Author: leo #Date: 2017-06-06 17:39:46 #Description: print blank line count for i in "$@" do [ -z ${i} ] && echo "${i} is zero " && continue COUNT=$(cat ${i} | grep -i "^$" | wc -l) #统计空行数目 # “^$” 正则表达式代表空字符串 echo "${i} 空格行为 ${COUNT}" done 为当前目录下的*.sh文件加上可执行权限 #!/bin/bash #Author: leo #Date: 2017-06-06 17:46:42 #Description: chmod a+x *.sh for i in `ls` do [ -f ${i} ] && [ ${i}=~.*\.sh ] && chmod a+x ${i} && echo " ${i} add author ok" || echo "file error" done 当前路径下的所以文件转移到文件夹下 #!/bin/bash #Author: leo #Date: 2017-07-06 02:25:49 #Description: move all file of current dir to a dir #create dir read -p "please input save dir : " saveDir mkdir ${saveDir} #move file to dir for i in `ls` do [ -f ${i} ] && `mv ${i} ./${saveDir}/` done #if dir is null , delete and warn let count=$(ls ./${saveDir}/ | wc -l) if [ ${count} -eq 0 ];then echo "no file to move" && `rm -rf ${saveDir}` fi 打印一些信息 #!/bin/sh #fun: some information print clear echo -e "\033[31m---------------------------1.date-----------------------------------" date echo -e "\033[31m---------------------------2.updatime-------------------------------" uptime echo -e "\033[31m---------------------------3.Last Logins(5)--------------------------" last -ai | head -5 echo -e "\033[31m---------------------------4.disk------------------------------------" #df -h 磁盘使用情况 df -h | grep "[\/]dev[\/]" | xargs | awk '{print "Free/total: " $4"/"$2" "$1}' echo -e "\033[31m---------------------------5.memory----------------------------------" #free -mh 内存使用情况 free -mh | grep "Mem" | xargs | awk '{ print "Free/Total: " $4 "/" $2 }' echo -e "\033[31m---------------------------6.most expensive Processes----------------" #top进行运行情况 top -b | head -10 | grep "^[\ ]" echo -e "\033[31m---------------------------7.vmstat-----------------------------------" #vmstat可以展现给定时间间隔的服务器的状态值,包括服务器的CPU使用率，内存使用，虚拟内存交换情况,IO读写情况 vmstat 2 5 | grep "^[\ ]" echo -e "\033[39m"