Summary of the shell face questions

1. Write a script to determine what the IP of the current online user is (there are many methods) in the 10.0.0.0/24 network.

#!/bin/shfor N in ' seq 254 ' does  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 are down ">>/tmp/downlist.log  fidone

2. Batch Create 10 System account OLDBOY01-OLDBOY10 and set a password (password is a random 8-bit string).

#! /bin/bash. /etc/init.d/functions  path=/server/scriptsuserdb= $Path/user.dbfaildb= $Path/fail_user.db  [-D "$Path"] | | Mkdir-p $Path [-F "$UserDb"] | | Touch $UserDb [-F "$FailDb"] | | Touch $FailDb for  N in $ (seq-w) do    passwd= ' echo $ (date+%t%n) $RANDOM |md5sum|cut-c 2-9 ' useradd oldboy$n    &G t;&/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$npas S: $passwd ">> $UserDb    else       action" AddUser oldboy$n "/bin/false       echo-e" user:\toldboy$npass:$ passwd ">> $FailDb    Fidone

　　

Summary of the shell face questions