修改主机名/添加用户名和密码/挂载目录等多功能脚本

该脚本的主要目的就是：修改主机名，添加用户名和密码并且挂载目录的脚本。

#!/bin/bash

#Add the hostname
read -p "Please input your hostname:" Hostname
hostname $Hostname 【必须得添加，如果不添加的话，我们的主机头就不会修改，

old=`cat /etc/sysconfig/network | grep HOSTNAME | awk -F= '{print $2}'`
sed -i "s/$old/$Hostname/g" /etc/sysconfig/network

echo "The /etc/sysconfig/network has changed,please check:"
echo "========================================="
cat /etc/sysconfig/network
echo "========================================="

ADDR=`ifconfig | grep Bcast | awk '{print $2}' | awk -F: '{print $2}'`
Hostn=`echo $Hostname|awk -F. '{print $1}'`
flage=`grep $ADDR /etc/hosts`
if [ -n "$flage" ];then
sed -i "/^$ADDR/d" /etc/hosts
echo "$ADDR $Hostname $Hostn" >> /etc/hosts
fi【判断语句，主要是为了在/etc/rc.local中重复添加mount语句，同时应该注意判断语句用的精妙之处，可参考我的博客】

echo " "
echo "Hostname has added to /ec/hosts,please check:"
cat /etc/hosts
echo " "

#start the portmap service
service portmap start
chkconfig --level 2345 cups on 【开启端口映射】

cd
mkdir -p /nfs
mount -t nfs 192.168.55.233:/opt/nfs /nfs
echo "Please check the mount point whether or not added to /nfs:"
df -h
echo "******************************************"
flag=`grep mount /etc/rc.local`
if [ -n "$flag" ];then
sed -i '/^mount/d' /etc/rc.local
fi 【判断语句，主要是为了在/etc/rc.local中重复添加mount语句，同时应该注意判断语句用的精妙之处，可参考我的博客】
echo "mount -t nfs 192.168.55.233:/opt/nfs /nfs" >> /etc/rc.local
echo "We have added the mount point to /etc/rc.local,please check:"
cat /etc/rc.local
echo "******************************************"

#This shell is to add a user and its password!
echo "Now we'll add the user oracle and its password! "
useradd oracle
echo " "
echo 99billadmin | passwd --stdin oracle
cat /etc/passwd | grep oracle 【在shell脚本中添加用户名密码】

echo " "
echo "You have successfully added the useroracle and its password!"

测试结果如下：

退出重新登录，显示结果为：

注意：

主机名设置完成后应重启系统,没有条件重启系统应重启重要服务,如 apache,snmp,ntp 等。