练习_文件批量创建用户

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#!/usr/bin/bash   #判断是否有参数 if [ $# -eq 0 ];then     echo "usage: `basename $0` file"     exit 1 fi   #判断是否是文件 if [ ! -f $1 ];then     echo "error file"     exit 2 fi   #for user in `cat $1` #do #   id $user &>/dev/null #   if [ $? -eq 0 ];then #       echo "user: $user already exists" #   else #       useradd $user #       echo "$pass" | passwd --sdtin $user &>/dev/null #       if [ $? -eq 0 ];then #           echo "$user is created" #       fi #   fi #done   #for处理文件 #IFS=$'\n'  #IFS文件分割符 for line in `cat $1` do     if [ ${#line} -eq 0 ];then         continue     fi     user=`echo "$line" | awk '{print $1}'`     user=`echo "$line" | awk '{print $2}'`     id $user &>/dev/null         if [ $? -eq 0 ];then                 echo "user: $user already exists"         else                 useradd $user                 echo "$pass" | passwd --sdtin $user &>/dev/null                 if [ $? -eq 0 ];then                         echo "$user is created"                 fi         fi done

　　

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#!/usr/bin/bash while read line do         if [ ${#line} -eq 0 ];then                 echo "------------"                 continue         fi         user=`echo $line | awk '{print $1}'`         pass=`echo $line | awk '{print $2}'`         id $user &>/dev/null         if [ $? -eq 0 ];then                 echo "$user already exists"         else                 useradd $user                 echo "$pass" | passwd --sdtin $user &>/dev/null                 if [ $? -eq 0 ];then                         echo "$user is created"                 fi         fi done < $1