「linux学习」之批量创建用户脚本

#! /bin/bash

if [ $# -eq 0 -o $# -gt 2 ];then # 判断是否输入参数及参数输入是否上限

echo '/root/foo.sh redhat fedora' >&2 修改为错误输出

exit 3

elif [ $1 == redhat ];then

echo fedora

elif [ $1 == fedora ];then

echo redhat

else

echo '/root/foo.sh redhat fedora' >&2 修改为错误输出

exit 5 退出并设定返回错误码

fi

批量创建用户脚本:

#! /bin/bash

for i in `$1`

do

useradd $i

echo $i 创建成功

done

授权:chmod +x /root/batcusers.sh

/root/batcusers.sh /root/batcusers.sh

脚本优化:

! /bin/bash

if [ $# -eq 0 ];then

echo 'Usage: /root/batchusers' >&2

exit 2

elif [ -f $1 ];then

for i in `cat $1`

do

useradd -s /bin/false $i #指定shell解释器创建用户

echo $i 创建成功

done

else

echo 'Input file not found' >&2

exit 3

fi