1、编写脚本/root/bin/systeminfo.sh,显示当前主机系统信息，包括主机名，IPv4地址，操作系统版本，内核版本，CPU型号，内存大小，硬盘大小。
[root@centos6 scripts]# cat systeminfo.sh
#!/bin/bash
HostName=`uname -n`
Ipv4=`ifconfig |sed -nr '2s#.*addr:(.*) Bca.*$#\1#gp'`
Cpu=`lscpu|sed -n '13p'|tr -s ' '`
Mem=`free -hm |grep "Mem"|tr -s ' ' ':'|cut -d: -f2`
Disk=`fdisk -l |grep '/dev/sda:'|sed -r 's#.*: (.*),.*$#\1#g'`
echo the hostname is: $HostName
echo the server_ip is: $Ipv4
echo the opeartion system is: $(cat /etc/redhat-release)
echo the kernel verison is: $(uname -r)
echo the cpuinfo is: $Cpu
echo the memery size is: $Mem
echo the Hardisk size is: $Disk
[root@centos6 scripts]# sh systeminfo.sh
the hostname is: centos6.localdomain
the server_ip is: 10.1.249.94
the opeartion system is: CentOS release 6.8 (Final)
the kernel verison is: 2.6.32-642.el6.x86_64
the cpuinfo is: Model name: AMD A8-4500M APU with Radeon(tm) HD Graphics
the memery size is: 980M
the Hardisk size is: 128.8 GB
[root@centos6 scripts]#
2、编写脚本/root/bin/backup.sh，可实现每日将/etc/目录备份到/root/etcYYYY-mm-dd中
[root@centos6 scripts]# cat backup.sh#!/bin/bashbackup_dir="/tmp/etc-$(date +%F)"cp -aR /etc/ $backup_dir && echo "the $backup_dir is backup successfull"[root@centos6 scripts]# sh backup.shthe /tmp/etc-2016-08-11 is backup successfull[root@centos6 scripts]# ll /tmp/总用量 40drwxr-xr-x. 122 root root 12288 8月 11 19:03 etc-2016-08-11 [root@centos6 scripts]#
3、编写脚本/root/bin/disk.sh,显示当前硬盘分区中空间利用率最大的值
[root@centos6 scripts]# cat disk.sh#!/bin/bashMaxUse=`df |grep "/dev/sda"|sed -r 's#.* ([0-9]+%).*#\1#g'|sort -nr|head -1`echo "当前硬盘分区中空间利用率最大的值为:$MaxUse"[root@centos6 scripts]# sh disk.sh当前硬盘分区中空间利用率最大的值为:22%[root@centos6 scripts]#
4、编写脚本/root/bin/links.sh,显示正连接本主机的每个远程主机的IPv4地址和连接数，并按连接数从大到小排序
[root@centos6 scripts]# cat links.sh#!/bin/bashLinks=`netstat -tn |grep tcp |tr -s ' ' ':'|cut -d: -f6|sort -nr|uniq -c`echo -e "主机的每个远程主机的IPv4连接数和地址为:$Links"[root@centos6 scripts]# sh links.sh主机的每个远程主机的IPv4连接数和地址为: 2 10.1.250.79[root@centos6 scripts]#
5、写一个脚本/root/bin/sumid.sh，计算/etc/passwd文件中的第10个用户和第20用户的ID之和
[root@centos6 scripts]# cat sumid.sh#!/bin/bashuuid1=`cat /etc/passwd|sed -n '10p'|cut -d: -f3`uuid2=`cat /etc/passwd|sed -n '20p'|cut -d: -f3`sum=$(($uuid1+$uuid2))echo "第10个用户和第20用户的ID之和为:$sum"[root@centos6 scripts]# sh sumid.sh第10个用户和第20用户的ID之和为:180[root@centos6 scripts]#
6、写一个脚本/root/bin/sumspace.sh，传递两个文件路径作为参数给脚本，计算这两个文件中所有空白行之和
[root@centos6 scripts]# cat sumspace.sh#!/bin/bash[ $# -lt 2 ] && echo "please input two path:" && exit 1 Args1=`grep "^$" $1 |wc -l`Args2=`grep "^$" $2 |wc -l` let sumspace=$Args1+$Args2 echo "这两个文件中所有空白行之和为:$sumspace"[root@centos6 scripts]# sh sumspace.sh /etc/issue /etc/issue这两个文件中所有空白行之和为:2[root@centos6 scripts]# sh sumspace.shplease input two path:[root@centos6 scripts]#
6、写一个脚本/root/bin/sumfile.sh,统计/etc, /var, /usr目录*有多少个一级子目录和文件
[root@centos6 scripts]# sh sumfile.shplease input at least three dir:[root@centos6 scripts]# sh sumfile.sh /etc /var /usr/etc,/var,/usr共有一级子目录和文件292个[root@centos6 scripts]# cat sumfile.sh#!/bin/bash[ $# -lt 3 ] && echo "please input at least three dir:" && exit 1 total1=`ls -A $1 |wc -l`total2=`ls -A $2 |wc -l`total3=`ls -A $3 |wc -l` sumfile=$(($total1+$total2+$total3))echo "$1,$2,$3共有一级子目录和文件$sumfile个"[root@centos6 scripts]#
7、写一个脚本/root/bin/argsnum.sh，接受一个文件路径作为参数；如果参数个数小于1，则提示用户“至少应该给一个参数”，并立即退出；如果参数个数不小于1，则显示第一个参数所指向的文件中的空白行数
[root@centos6 scripts]# sh argsum.shat least input one args:[root@centos6 scripts]# sh argsum.sh /etc/issuethe args you input has 1 lines space[root@centos6 scripts]# cat argsum.sh#!/bin/bash [ $# -lt 1 ] && echo "at least input one args:" && exit 1 || echo "the args you input has `grep "^$" $1|wc -l` lines space"[root@centos6 scripts]#
8、写一个脚本/root/bin/hostping.sh，接受一个主机的IPv4地址做为参数，测试是否可连通。如果能ping通，则提示用户“该IP地址可访问”；如果不可ping通，则提示用户“该IP地址不可访问”
[root@centos6 scripts]# sh hostping.shplease input one ip address:[root@centos6 scripts]# sh hostping.sh 10.1.249.94you can access the website![root@centos6 scripts]# sh hostping.sh 10.1.249.93the ip is not unreachable[root@centos6 scripts]# cat hostping.sh#!/bin/bash[ $# -lt 1 ] && echo "please input one ip address:" && exit 1ping -c1 -W1 $1 &>/dev/null && echo "you can access the website!" || echo "the ip is not unreachable" [root@centos6 scripts]#
本文出自 “小耳朵” 博客，请务必保留此出处http://purify.blog.51cto.com/10572011/1837417