1、写一个脚本,给脚本传递两个参数,显示两者之和和两者之积
#!/bin/bash #写一个脚本,给脚本传递两个参数,显示两者之和和两者之积 read -p "请输入第一个数:" num1 read -p "请输入第二个数:" num2 echo $[$num1+$num2] echo $[$num1*$num2]
2、写一个脚本,能接受一个参数(文件路径),判断这个参数如果是一个存在的文件就显示“ok”,否则显示“No such file"
#!/bin/bash read -p "请输入一个文件路径:" filename if [ -e $filename ];then echo "OK" else echo "No such file" fi
3、判断/etc/inittab文件是否大于100行,如果大于,则显示”/etc/inittab is a big file.”否者显示”/etc/inittab is a small file.”
#!/bin/bash Line=`wc -l /etc/inittab | cut -d" " -f1` if [ $Line -gt 100 ];then echo "/etc/inittab is a big file." else echo "/etc/inittab is a small file." fi
4、给定一个用户,来判断这个用户是什么用户,如果是管理员用户,则显示“该用户为管理员”,否则显示“该用户为普通用户”。
#!/bin/bash a=`whoami` str="root" if [ $a = $str ];then echo "该用户为管理员" else echo "该用户为普通用户" fi
5、判断某个文件是否存在
#!/bin/bash read -p "输入查找的文件名:" filename find $filename &> /dev/null if [ $? -eq 0 ];then echo "这个文件存在" else echo "这个文件不存在" fi
6、写出一个脚本程序,给定一个文件,比如:/etc/inittab
a、判断这个文件中是否有空白行?
b、如果有,则显示其空白行的行号,否则显示没有空白行。
#!/bin/bash 2 b=`grep -n "^[[:space:]]*$" /etc/inittab | wc -l` 3 4 c=`grep -n "^[[:space:]]*$" /root/kongbai | cut -d: -f1` 5 if [ $b -eq 0 ];then 6 echo "没有空白行" 7 exit 1 8 else 9 echo "有空白行,空白行为$c行" 10 exit 0 11 fi
7、判断用户的默认shell程序是否为bash程序,有就显示有多少个,没有就显示:没有这类用户。
1 #!/bin/bash 2 # Author: 张琦妮 3 # Blog: https://home.cnblogs.com/zqntx/ 4 # Time: 2019-09-11 15:57:34 5 # Name: panduan.sh 6 # Version: v1.0 7 # Description: This is a Script. 8 declare -i sum=`grep "bin/bash$" /etc/passwd | wc -l` 9 if grep "/bin/bash$" /etc/passwd &> /dev/null;then 10 echo "存在 $sum 个用户,shell程序为/bin/bash" 11 grep "/bin/bash$" /etc/passwd | cut -d: -f1 12 exit 0 13 else 14 echo "没有这类用户" 15 exit 1 16 fi
8、判断历史命令总条目是否大于1000,大于显示“some command will gone”,否则显示OK。
1 #!/bin/bash 2 # Author: 张琦妮 3 # Blog: https://home.cnblogs.com/zqntx/ 4 # Time: 2019-09-11 16:06:04 5 # Name: history.sh 6 # Version: v1.0 7 # Description: This is a Script. 8 9 declore -i num 10 11 num=`history | wc -l` 12 13 if [ $num -gt 30 ];then 14 echo "some command will gone" 15 exit 0 16 else 17 echo "OK" 18 exit 1 19 fi
9、给定一个文件,如果是普通文件和目录文件,就显示出来,否则显示“无法识别”。
1 #!/bin/bash 2 # Author: 张琦妮 3 # Blog: https://home.cnblogs.com/zqntx/ 4 # Time: 2019-09-11 16:39:33 5 # Name: wenjian.sh 6 # Version: v1.0 7 # Description: This is a Script. 8 9 read -t 50 -p "请输入一个文件:" filename 10 11 if [ -z $filename ];then 12 echo "eg./etc/fstab" 13 exit 8 14 fi 15 16 if [ -f $filename ];then 17 echo "$filename 是一个普通文件" 18 exit 0 19 elif [ -d $filename ];then 20 echo "$filename 是一个目录文件" 21 else 22 echo "无法识别" 23 exit 1 24 fi
10、输入一个设备文件,输出这个设备文件的基本信息。
1 #!/bin/bash 2 # Author: 张琦妮 3 # Blog: https://home.cnblogs.com/zqntx/ 4 # Time: 2019-09-12 17:09:59 5 # Name: shebei.sh 6 # Version: v1.0 7 # Description: This is a Script. 8 9 read -t 50 -p "输入设备文件名:" devname 10 [ -z $devname ] && devname=`fdisk -l` && exit 1 11 12 if [ -b /dev/$devname ];then 13 fdisk -l /dev/$devname 14 exit 0 15 else 16 echo "$devname 不是设备文件" 17 echo "Usage:'请输入一个设备文件,如sda'" 18 exit 2 19 fi
11、判断文件是否存在,如果存在输出是什么文件。
1 #!/bin/bash 2 # Author: 张琦妮 3 # Blog: https://home.cnblogs.com/zqntx/ 4 # Time: 2019-09-13 10:40:27 5 # Name: ceshipanduan.sh 6 # Version: v1.0 7 # Description: This is a Script. 8 9 read -p "输入一个文件名:" name 10 if [ -z $name ];then 11 echo "Usage:'输入一个文件名:/etc/fstab" 12 exit 1 13 fi 14 15 if [ ! -e $name ];then 16 echo "提示:输入的文件不存在!!!" 17 exit 2 18 elif [ -f $name ];then 19 echo "$name is a file." 20 elif [ -b $name ];then 21 echo "$name is a block file." 22 elif [ -L $name ];then 23 echo "$name is a Link file." 24 elif [ -d $name ];then 25 echo "$name is a dir file." 26 else 27 echo "$name 是其他文件类型" 28 fi
12、99乘法表
1 #!/bin/bash 2 # Author: 张琦妮 3 # Blog: https://home.cnblogs.com/zqntx/ 4 # Time: 2019-09-13 11:46:09 5 # Name: 99.sh 6 # Version: v1.0 7 # Description: This is a Script. 8 9 for i in `seq 9`;do 10 for j in `seq 9`;do 11 [ $j -le $i ] && echo -n -e "$i*$j=`echo $(($i*$j))`\t" 12 done 13 echo " " 14 done
13、用for循环遍历所有本网络网段中所有的up的电脑
1 #!/bin/bash 2 # Author: 张琦妮 3 # Blog: https://home.cnblogs.com/zqntx/ 4 # Time: 2019-09-13 11:56:36 5 # Name: up.sh 6 # Version: v1.0 7 # Description: This is a Script. 8 9 declare -i sum=0 10 11 for i in $(seq 1 100);do 12 ping -c 1 -w 1 10.6.12.$i &> /dev/null 13 if [ $? -eq 0 ];then 14 let sum++ 15 echo "10.6.12.$i 是通的" 16 else 17 echo "10.6.12.$i 是不通的" 18 fi 19 done 20 21 echo "总共有$sum 台电脑在线"
14、求出1到100的偶数和
1 #!/bin/bash 2 # Author: 张琦妮 3 # Blog: https://home.cnblogs.com/zqntx/ 4 # Time: 2019-09-13 12:21:21 5 # Name: oushuhe.sh 6 # Version: v1.0 7 # Description: This is a Script. 8 9 declare -i sum=0 10 11 for i in $(seq 0 2 100);do 12 let sum+=$i 13 done 14 15 echo "总数为:$sum"
15、编写脚本查看CPU,磁盘,内存等信息
1 #!/bin/bash 2 # Author: 张琦妮 3 # Blog: https://home.cnblogs.com/zqntx/ 4 # Time: 2019-09-17 14:57:08 5 # Name: chakan.sh 6 # Version: v1.0 7 # Description: This is a Script. 8 cat << EOF 9 菜单 10 ------------------- 11 cpu)显示CPU信息 12 mem)显示内存信息 13 disk)显示磁盘信息 14 quit)退出 15 ------------------ 16 EOF 17 18 read -t 5 -p "请输入需要查看的信息:" infomation 19 echo 20 21 if [ -z $infomation ];then 22 echo "请输入一个正确的参数" 23 echo "例如:cpu|mem|disk|quit" 24 exit 1 25 fi 26 27 if [ $infomation = 'cpu' ];then 28 cat /proc/cpuinfo 29 elif [ $infomation = 'mem' ];then 30 free -m 31 elif [ $infomation = 'disk' ];then 32 fdisk -l 33 elif [ $infomation = 'quit' ];then 34 echo "正确退出" 35 else 36 echo "输出内容不正确,请输出如下内容" 37 echo "例如:cpu|mem|disk|quit" 38 fi
15.2 编写脚本查看CPU,磁盘,内存等信息。加while循环,执行一个信息不退出。
8 cat << EOF 9 菜单 10 ------------------- 11 cpu)显示CPU信息 12 mem)显示内存信息 13 disk)显示磁盘信息 14 quit)退出 15 ------------------ 16 EOF 17 18 while true;do 19 20 read -t 5 -p "请输入需要查看的信息:" infomation 21 echo 22 23 if [ -z $infomation ];then 24 echo "请输入一个正确的参数" 25 echo "例如:cpu|mem|disk|quit" 26 exit 1 27 fi 28 29 if [ $infomation = 'cpu' ];then 30 cat /proc/cpuinfo 31 elif [ $infomation = 'mem' ];then 32 free -m 33 elif [ $infomation = 'disk' ];then 34 fdisk -l 35 elif [ $infomation = 'quit' ];then 36 echo "正确退出" 37 else 38 echo "输出内容不正确,请输出如下内容" 39 echo "例如:cpu|mem|disk|quit" 40 fi 41 42 done