基础脚本
判断分数范围，分出优秀、合格、不合格三档 if
#!/bin/bash
read -p "请输入你的分数(0-100):" GRADE
if [ $GRADE -ge 85 ] && [ $GRADE -le 100 ]
then
echo "$GRADE 分,优秀！"
elif [ $GRADE -ge 70 ] && [ $GRADE -le 84 ]
then
echo "$GRADE 分,合格!"
else
echo "$GRADE 分,不合格!"
fi
根据IP 地址列表检查主机状态 if
#!/bin/bash
HLIST=$( cat /root/shell_demo/ipadds.txt)
for IP in $HLIST
do
ping -c 3 -i 0.2 -W 3 $IP &>/dev/null
if [ $? -eq 0 ]
then
echo "ping $IP ok"
else
echo "ping $IP not ok"
fi
done
判断用户是否创建 if
#!/bin/bash
UNAME="zhangsna"
if id -u $UNAME >/dev/null 2>&1
then
echo "用户 $UNAME 已存在"
else
useradd $UNAME
echo "用户 $UNAME 创建成功"
fi
- ipadds.txt
192.168.188.100
192.168.188.200
192.168.188.300
192.168.188.400
www.baidu.com
- users.txt
zhangsan
lisi
wangwu
housi
根据姓名批量添加用户 for
#!/bin/bash
ULIST=$(cat /root/shell_demo/users.txt)
for UNAME in $ULIST
do
if id -u $UNAME >/dev/null 2>&1
then
echo "用户 $UNAME 已存在"
else
useradd $UNAME
echo "123456" | passwd $UNAME &>/dev/null
echo "用户 $UNAME 创建成功"
fi
done
批量删除用户 for
#!/bin/bash
ULIST=$(cat /root/shell_demo/users.txt)
for UNAME in $ULIST
do
if id -u $UNAME > /dev/null 2>&1
then
userdel -r $UNAME &>/dev/null
echo "用户 $UNAME 删除成功"
else
echo "用户 $UNAME 不存在"
fi
done
批量添加有规律的用户 while
#!/bin/bash
PREFIX="stu"
i=1
while [ $i -le 10 ]
do
useradd ${PREFIX}$i
echo "12345" | passwd ${PREFIX}$i &> /dev/null
let i++
echo "用户 ${PREFIX}$i 成功"
done
批量删除上述添加的用户 while
#!/bin/bash
PREFIX="stu"
i=1
while [ $i -le 10 ]
do
if id -u ${PREFIX}$i >/dev/null
then
userdel -r ${PREFIX}$i
let i++
echo "用户${PREFIX}$i 删除成功"
else
echo "用户${PREFIX}$i 不存在"
fi
done
