1、写一个脚本,判断当前系统上所有用户的shell是否为可登录shell(即用户的shell不是/sbin/nologin);分别这两类用户的个数;通过字符串比较来实现;
#!/bin/bash #the purpose of program : # #08/11/2016 PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin export PATH awk -F":" 'BEGIN{num1=0;num2=0;}{if($NF != "/sbin/nologin") {printf "%s is login user\n",$1 ;num1+=1;} else {printf "%s is nologin user \n",$1;num2+=1;}}END{printf "loguser number :%d \n nologin user number:%d \n",$num1,$numn2; }' /etc/passwd
2、写一个脚本
(1) 获取当前主机的主机名,保存于hostname变量中;
(2) 判断此变量的值是否为localhost,如果是,则将当前主机名修改为www.magedu.com;
(3) 否则,则显示当前主机名;
#!/bin/bash #the purpose of program : # #08/12/2016 PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin export PATH hostname=$(hostname ) if [ $hostname == "localhost" ];then hostname www.magedu.com else echo "$hostname" fi
3、写一个脚本,完成如下功能
(1) 传递一个磁盘设备文件路径给脚本,判断此设备是否存在;
(2) 如果存在,则显示此设备上的所有分区信息;
#!/bin/bash #the purpose of program : # #08/12/2016 PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin export PATH read -p "Please input a dev directory: " devdir if [ -b $devdir ];then fdisk -l |grep "${devdir}" fi
4、写一个脚本,完成如下功能
脚本能够接受一个参数;
(1) 如果参数1为quit,则显示退出脚本,并执行正常退出;
(2) 如果参数1为yes,则显示继续执行脚本;
(3) 否则,参数1为其它任意值,均执行非正常退出;
#!/bin/bash #the purpose of program : # #08/12/2016 PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin export PATH case $1 in "quit") echo "scripts quit" exit 0 ;; "yes") echo "continue the scripts" ;; *) echo "Abnormal exit " exit 1 ;; esac
5、写一个脚本,完成如下功能
传递一个参数给脚本,此参数为gzip、bzip2或者xz三者之一;
(1) 如果参数1的值为gzip,则使用tar和gzip归档压缩/etc目录至/backups目录中,并命名为/backups/etc-20160613.tar.gz;
(2) 如果参数1的值为bzip2,则使用tar和bzip2归档压缩/etc目录至/backups目录中,并命名为/backups/etc-20160613.tar.bz2;
(3) 如果参数1的值为xz,则使用tar和xz归档压缩/etc目录至/backups目录中,并命名为/backups/etc-20160613.tar.xz;
(4) 其它任意值,则显示错误压缩工具,并执行非正常退出;
#!/bin/bash #the purpose of program : # #08/12/2016 PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin export PATH cd /backups ||mkdir /backups case $1 in "gzip") tar -z -c -f /backups/etc-$(date +%Y%m%d).tar.gz /etc ;; "bzip2") tar -j -c -f /backups/etc-$(date +%Y%m%d).tar.bz2 /etc ;; "xz") tar -J -c -f /backups/etc-$(date +%Y%m%d).tar.xz /etc ;; *) echo "Wrong compression tool " exit 1 ;; esac
6、写一个脚本,接受一个路径参数:
(1) 如果为普通文件,则说明其可被正常访问;
(2) 如果是目录文件,则说明可对其使用cd命令;
(3) 如果为符号链接文件,则说明是个访问路径;
(4) 其它为无法判断;
#!/bin/bash #the purpose of program : # #08/12/2016 PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin export PATH read -p "Please input one path " pathname if [ -f ${pathname} ];then echo "this is a general file,use it as usual" elif [ -d ${pathname} ];then echo -e "this is a directory,we can use \"cd\" command for it" elif [ -L ${pathname} ];then echo -e "this is a link file" else echo "we can't decide the type of file " fi
7、写一个脚本,取得当前主机的主机名,判断
(1) 如果主机名为空或为localhost,或为"(none)",则将其命名为mail.magedu.com;
(2) 否则,显示现有的主机名即可;
#!/bin/bash #the purpose of program : # #08/12/2016 PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin export PATH hostname=$(hostname ) case $hostname in "localhost") hostname mail.magedu.com ;; "none") hostname mail.magedu.com ;; "") hostname mail.magedu.com ;; *) echo "$hostname" ;; esac
8、写一脚本,接受一个用户名为参数;
(1) 如果用户的id号为0,则显示其为管理员;
(2) 如果用户的id号大于0且小于500, 则显示其为系统用户;
(3) 否则,则显示其为普通用户;
#!/bin/bash #the purpose of program : # #08/12/2016 PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin export PATH read -p "input one user name: " username id ${username} &> /dev/null && result=0||result=1 while [ ${result} -eq 1 ];do read -p "input one user name ,your input is not a user name :" username id ${username} &> /dev/null && result=0||result=1 done userid=$(id -u ${username}) if [ ${userid} -eq 0 ];then echo "user is root " elif [ ${userid} -gt 0 -a ${userid} -lt 500 ];then echo "user is system user" else echo "user is general user" fi
10、写一个脚本,传递一个用户名参数给脚本;
(1) 如果用户的id号大于等于500,且其默认shell为以sh结尾的字符串,则显示“a user can log system.”类的字符串;
(2) 否则,则显示无法登录系统;
#!/bin/bash #the purpose of program : # #08/12/2016 PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin export PATH read -p "input one user name: " username id ${username} &> /dev/null && result=0||result=1 while [ ${result} -eq 1 ];do read -p "input one user name ,your input is not a user name :" username id ${username} &> /dev/null && result=0||result=1 done userid=$(id -u ${username}) usershell=$(grep -E "^${username}" /etc/passwd|cut -d: -f7|grep ".*sh$") if [ ${userid} -ge 500 -a ${usershell} != "" ];then echo "a user can log system." else echo "a user can't log system" fi
11、写一个脚本,完成如下任务 :
(1) 按顺序分别复制/var/log目录下的每个直接文件或子目录至/tmp/test1-testn目录中;
(2) 复制目录时,才使用cp -r命令;
(3) 复制文件时使用cp命令;
(4) 复制链接文件时使用cp -d命令;
(5) 余下的所有类型,使用cp -a命令;
#!/bin/bash #the purpose of program : # #08/12/2016 PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin export PATH cd /var/log mkdir -p /tmp/test1-testn for i in $(ls );do if [ -d $i ];then cp -r $i /tmp/test1-testn continue elif [ -f $i ];then cp $i /tmp/test1-testn continue elif [ -L $i ];then cp -d $i /tmp/test1-testn continue else cp -a $i /tmp/test1-testn continue fi done
原创文章,作者:N20-重庆-雪寒,如若转载,请注明出处:http://www.178linux.com/18707
评论列表(1条)
写的很好,排版也很棒,加油 case的是不是可以用if做那?尝试一下