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 bin]# systeminfo.sh Hostname: CentOs6.localdomain; IP address: 10.1.252.175 ; System version: CentOS release 6.8 (Final); kernel version: 2.6.32-642.el6.x86_64; CPU type : Intel(R) Core(TM) i5-2450M CPU @ 2.50GHz; Disk size : 107.4 GB ############################################################################################# [root@CentOs6 bin]# vim systeminfo.sh #!/bin/bash echo " Hostname: `hostname`;" echo " IP address: ` ifconfig | sed -n '2p' | cut -d: -f2 | cut -d\ -f1` ;" echo "System version: `cat /etc/redhat-release`;" echo "kernel version: `uname -r`;" echo " CPU type : `lscpu | sed -n 's/Model name:[[:space:]]\+//p'`;" echo " Disk size : `fdisk -l | sed -nr -e 's@.*:(.*),.*@\1@p' | head -1`"
2、编写脚本/root/bin/backup.sh，可实现每日将/etc/目录备到/root/etcYYYY-mm-dd中
[root@CentOs6 bin]# vim backup.sh #!/bin/bash echo "backup start" cp -a /etc /root/etc`date +%F` echo "backup over"
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 bin]# disk.sh the disk max using rate is :19% ############################################################################################# [root@CentOs6 bin]# vim disk.sh #!/bin/bash echo "the disk max using rate is :`df | grep "sd" | tr -s ' ' | cut -d\ -f5 | sort -n | tail -1`"
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 bin]# links.sh The links :2 10.1.250.27 ########################################################################################### [root@CentOs6 bin]# vim links.sh #!/bin/bash echo "The links :`netstat -nt |tr -s ' ' |cut -d ' ' -f5 |cut -d: -f1 |grep [0-9]|sort |uniq -c|sort -nr | sed -r 's/^[[:space:]]+//'`"
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 bin]# sumid.sh this's user 10 UID:10 this's user 20 UID:32 they are sumID is :42 ############################################################################################## [root@CentOs6 bin]# vim sumid.sh #!/bin/bash user10=`sed -n '10p' /etc/passwd | cut -d: -f3` echo "this's user 10 UID:$user10" user20=`sed -n '20p' /etc/passwd | cut -d: -f3` echo "this's user 20 UID:$user20" sum=$[user10+user20] echo "they are sumID is :$sum"
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 bin]# sumspace.sh please input filename1 :/etc/issue please input filename2 :/etc/issue space sum is :10 ######################################################################################### [root@CentOs6 bin]# vim sumspace.sh #!/bin/bash read -p "please input filename1 :" file file10=`egrep -c '^$' $file` read -p "please input filename2 :" file2 file20=`egrep -c '^$' $file2` sumspace=$(( file10 + file20 )) echo "space sum is :$sumspace"
7、写一个脚本/root/bin/sumfile.sh,统计/etc, /var, /usr目录中共有多少个一级子目录和文件
[root@CentOs6 bin]# sumfile.sh file /etc :230 file /var :22 file /usr :13 filesum = 265 ############################################################################################## [root@CentOs6 bin]# vim sumfile.sh #!/bin/bash etc=`ls -1 /etc | wc -l` echo "file /etc :$etc" var=`ls -1 /var | wc -l` echo "file /var :$var" usr=`ls -1 /usr | wc -l` echo "file /usr :$usr" filesum=$[ etc+var+usr ] echo "filesum = $filesum"
8、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 bin]# argsnum.sh plese input file:/etc/issue The file space : 5 ############################################################################################## [root@CentOs6 bin]# vim argsnum.sh #!/bin/bash # read -p "plese input file:" file if [[ -f $file ]];then echo "The file space : `egrep -c "^$" $file`" else echo "Should at least give args" fi
9、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 bin]# hostping.sh plase input ipaddr:10.1.0.1 Connect successfully ############################################################################################## [root@CentOs6 bin]# vim hostping.sh #!/bin/bash read -p "plase input ipaddr:" ip ping -W1 -c1 $ip &> /dev/null && echo Connect successfully || echo Connect fail
10、判断硬盘的每个分区空间和inode的利用率是否大于80，如果是，发邮件通知root磁盘满
[root@CentOs6 bin]# using.sh disk use normal ############################################################################################## [root@CentOs6 bin]# vim using.sh #!/bin/bash inode=`df -i | egrep -o "[1-9][0-9]%" | sed -r 's@([0-9]+)%@\1@'` disk=`df -P | egrep -o "[2-9][0-9]%" | sed -r 's@([0-9]+)%@\1@'` [ $inode -ge 80 ] || [ $disk -ge 80 ] && mail -s 'disk over' root < /root/bin/mail || echo "disk use normal";exit
11、指定文件做为参数，判断文件是否为.sh后缀，如果是，添加x权限
[root@CentOs6 bin]# chfile.sh please input filename:test.sh test.sh ############################################################################################## [root@CentOs6 bin]# vim chfile.sh read -p "please input filename:" file [ -f $file ] && echo "$file" | grep "\.sh$" && chmod +x $file;exit || exit
12、判断输入的IP是否为合法IP
[root@CentOs6 bin]# ipok.sh
plese input ip address:192.168.1.0
You input ipaddr OK
##############################################################################################
[root@CentOs6 bin]# vim ipok.sh
read -p "plese input ip address:" ipaddr
echo $ipaddr | egrep "^(\b([1-9]|[1-9][0-9]|1[0-9]{2}|2[0-2][0-3])\b\.)(\b([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\b\.){2}(\b([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-4])\b)$" &> /dev/null && echo "You input ipaddr OK " || echo "You input ipaddr don't OK"
13、计算1+2+3+…+100
[root@CentOs6 bin]# digitsum.sh
digit sum is :5050
##############################################################################################
[root@CentOs6 bin]# vim digitsum.sh
#!/bin/bash
#
sum=`echo {1..100} | tr " " "+" | bc`
echo "digit sum is :$sum"
14、输入起始值A和最后值B，计算从A+（A+1）…+(B-1)+B的总和
[root@CentOs6 bin]# ABsum.sh please input value A:100 please input value B:1 A + B = :5050 ############################################################################################## [root@CentOs6 bin]# vim ABsum.sh #!/bin/bash read -p "please input value A:" A read -p "please input value B:" B [ $A -lt $B ] && echo " A + B sum :`seq -s+ $A $B| bc`" || echo " A + B = :`seq -s+ $B $A| bc`"
原创文章，作者：Lii，如若转载，请注明出处：http://www.178linux.com/34251
