bash脚本编程实例

1.写一个脚本

接受一个以上文件路径作为参数
显示每个文件拥有的行数

总结说明本次共为几个文件统计了其行数

#!/bin/bash
#
read -p "please input some paths:" paths
if [ -z $paths ];then
 echo "There are not any paths inputting."
 exit 1
fi
declare -i files=0
for i in $paths;do
 if [ ! -e $i ];then
     echo "$i is not existing."
     continue
 elif [ ! -f $i ];then
     echo "$i is not a file"
     continue
 else
     count=`wc -l $i|cut -d' ' -f2`
     echo "$i has $count lines."
     files=$[$files+1]
 fi
done
echo "counting lines for $files files."

2.写一个脚本

传递两个以上字符串当做用户名
创建这些用户，且密码同为用户名

总结说明共创建了几个用户

#!/bin/bash
#
read -p "please input some usernames:" usernames
if [ -z $usernames ];then
 echo "There are not any usernames inputting."
 exit 1
fi
declare -i users=0
for i in $usernames;do
 if ! id $i &> /dev/null;then
     useradd $i
     echo $i|passwd --stdin $i
     users=$[$users+1]
 else
     echo "$i has existed."
     continue
 fi
done
echo "createing users for $users users."

3.写一个脚本，新建20个用户，visitor1-visitor20，计算他们的ID之和

#!/bin/bash
  #
  declare -i ids=0
  for i in {1..20};do
      if ! id visitor$i &> /dev/null;then
          useradd visitor$i
          echo "create a new user named visitor$i."
      else
          echo "this user named visitor$i has existed."
      fi
      id=`id -u visitor$i`
      ids=$[$ids+$id]
  done
  echo "id count for these users are $ids."

原创文章，作者：N27_xiaoni，如若转载，请注明出处：http://www.178linux.com/84388