shell面試題總結
阿新 • • 發佈：2017-11-13
用戶 date adduser /dev/null dir then light /dev/ lin 1.寫一個腳本，實現判斷10.0.0.0/24網絡裏，當前在線用戶的IP有哪些（方法有很多）
#!/bin/sh
for n in `seq 254`
do
ping -c1 -w1 10.0.0.$n &>/dev/null
if [ $? -eq 0 ]
then
echo "10.0.0.$n is up ">>/tmp/uplist.log
else
echo "10.0.0.$n is down ">>/tmp/downlist.log
fi
done
2.批量創建10個系統帳號oldboy01-oldboy10並設置密碼（密碼為隨機8位字符串）。
#! /bin/bash
. /etc/init.d/functions
Path=/server/scripts
UserDb=$Path/user.db
FailDb=$Path/fail_user.db
[ -d "$Path" ] || mkdir-p $Path
[ -f "$UserDb" ] ||touch $UserDb
[ -f "$FailDb" ] ||touch $FailDb
for n in $(seq -w 10)
do
passwd=`echo $(date+%t%N)$RANDOM|md5sum|cut -c 2-9`
useradd oldboy$n >&/dev/null&& user_status=$?
echo "$passwd"|passwd --stdinoldboy$n >&/dev/null && pass_status=$?
if [ $user_status -eq 0 -a $pass_status -eq0 ];then
action "adduser oldboy$n"/bin/true
echo -e "user:\toldboy$npass:$passwd" >>$UserDb
else
action "adduser oldboy$n"/bin/false
echo -e "user:\toldboy$npass:$passwd" >>$FailDb
fi
done
shell面試題總結