centos7 lvm合并分区脚本初探-linux性能测试 -centos7修改网卡名字-jdk环境安装脚本-关键字查询文件-批量添加用户

时间：2021-09-05 07:28:34
1.
#!/bin/bash

lvmdiskscan | grep centos > /root/a.txt

a=`sed -n '1p' /root/a.txt`

b=`sed -n '2p' /root/a.txt`

c=`sed -n '3p' /root/a.txt`

cat <<eof

** . 分区 $a**

** . 分区 $b**

** . 分区 $c**

eof

2完成版centos分区合并

#!/bin/bash
lvmdiskscan | grep centos > /root/a.txt
cat /root/a.txt | while read ips;
do
a1=`echo $ips|awk '{ print $1 }'`
a2=`echo $ips|awk '{ print $3 }'`
a3=`echo ${a2%.*}`
echo $a1
echo $a3
done
read -p "remove lv: " remove2
read -p "add lv: " add2
read -p "big : " big
rmfstab=`echo ${remove2##*/}`
addlvname=`echo ${add2##*/}`
addlvtype=`blkid | grep $addlvname | awk -F "[\"\"]" '{print $4}'`
umount $remove2
lvremove $remove2
lvextend -L +"$big"G $add2
# 变量记得加双引号
if [[ $addlvtype == xfs ]] ;then
# 根据字符串判断
xfs_growfs $add2
else
resize2fs $add2
fi
sed -i "/"$rmfstab"/d" /etc/fstab
# 删除移除lv开机挂载 注意使用时删除注释内容
mount -a

参考https://www.cnblogs.com/flintlovesam/p/6677037.html

https://www.cnblogs.com/keanuyaoo/p/3359838.html

${file#*/}：删掉第一个 / 及其左边的字符串：dir1/dir2/dir3/my.file.txt
${file##*/}：删掉最后一个 /  及其左边的字符串：my.file.txt
${file#*.}：删掉第一个 .  及其左边的字符串：file.txt
${file##*.}：删掉最后一个 .  及其左边的字符串：txt
${file%/*}：删掉最后一个  /  及其右边的字符串：/dir1/dir2/dir3
${file%%/*}：删掉第一个 /  及其右边的字符串：(空值)
${file%.*}：删掉最后一个  .  及其右边的字符串：/dir1/dir2/dir3/my.file
${file%%.*}：删掉第一个  .   及其右边的字符串：/dir1/dir2/dir3/my

记忆的方法为：

复制代码 代码如下:
# 是 去掉左边（键盘上#在 $ 的左边）
%是去掉右边（键盘上% 在$ 的右边）
单一符号是最小匹配；两个符号是最大匹配
其他脚本方式参考
https://www.cnblogs.com/out8/p/4353017.html
centos7 性能测试
#! /bin/bash

#==============================================================#

#   Description:  Unixbench script                             #

#   Author: Teddysun <i@teddysun.com>                          #

#   Intro:  https://teddysun.com/245.html                      #

#==============================================================#

cur_dir=/opt/unixbench

# Check System

[[ $EUID -ne  ]] && echo 'Error: This script must be run as root!' && exit

[[ -f /etc/redhat-release ]] && os='centos'

[[ ! -z "`egrep -i debian /etc/issue`" ]] && os='debian'

[[ ! -z "`egrep -i ubuntu /etc/issue`" ]] && os='ubuntu'

[[ "$os" == '' ]] && echo 'Error: Your system is not supported to run it!' && exit 

# Install necessary libaries

if [ "$os" == 'centos' ]; then

    yum -y install make automake gcc autoconf gcc-c++ time perl-Time-HiRes

else

    apt-get -y update

    apt-get -y install make automake gcc autoconf time perl

fi

# Create new soft download dir

mkdir -p ${cur_dir}

cd ${cur_dir}

# Download UnixBench5.1.3

if [ -s UnixBench5.1.3.tgz ]; then

    echo "UnixBench5.1.3.tgz [found]"

else

    echo "UnixBench5.1.3.tgz not found!!!download now..."

    if ! wget -c https://dl.lamp.sh/files/UnixBench5.1.3.tgz; then

        echo "Failed to download UnixBench5.1.3.tgz, please download it to ${cur_dir} directory manually and try again."

        exit

    fi

fi

tar -zxvf UnixBench5.1.3.tgz && rm -f UnixBench5.1.3.tgz

cd UnixBench/

#Run unixbench

make

./Run

echo

echo

echo "======= Script description and score comparison completed! ======= "

echo

echo

lvm 扩容分区

     /sbin/fdisk /dev/sda

     partprobe #同步分区表到硬盘

     ls /dev/sda*

     pvcreate /dev/sda3

     vgs

     vgextend centos /dev/sda3

     vgs

     lvs

     df -h

     vgs

     lvextend -L +200G /dev/mapper/centos-root
xfs_growfs /dev/mapper/centos-root #扩容真实大小

修改网卡名字脚本 ip和网关 网卡名字 记得修改

#!/bin/bash

NETIP=192.168.120.72

NETGATWAY=192.168.120.1

# 用不到HOSTNAME=dockercang.cn

DNS1=223.5.5.5

ethold=ens192

cat << EOF

+------------------------------------------------------------------+

|     **********  Welcome to CentOS .x Rename Network  **********    |

+------------------------------------------------------------------+

EOF

[ `whoami` != "root" ] && echo "please use root" && exit

function format() {

    echo -e "\033[32m Success!!!\033[0m\n"

    echo "#########################################################"

}

echo "修改配置文件"

rm -rf /etc/sysconfig/network-scripts/ifcfg-$ethold

cat > /etc/sysconfig/network-scripts/ifcfg-eth0 << EOF

TYPE=Ethernet

BOOTPROTO=none

NAME=eth0

DEVICE=eth0

ONBOOT=yes

IPADDR=$NETIP

PREFIX=

GATEWAY=$NETGATWAY

DNS1=$DNS1

EOF

format

echo "编辑内核信息"

cat > /etc/sysconfig/grub << EOF

GRUB_TIMEOUT=

GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"

GRUB_DEFAULT=saved

GRUB_DISABLE_SUBMENU=true

GRUB_TERMINAL_OUTPUT="console"

GRUB_CMDLINE_LINUX="crashkernel=auto rhgb net.ifnames=0 biosdevname=0 quiet"

GRUB_DISABLE_RECOVERY="true"

EOF

format

echo "生成启动菜单"

grub2-mkconfig -o /boot/grub2/grub.cfg

format

reboot

jdk安装脚本

#!/bin/bash
wget http://192.168.130.150/jdk/jdk-8u211-linux-x64.tar.gz
tar xf jdk-8u211-linux-x64.tar.gz -C /usr/local/
echo "export JAVA_HOME=/usr/local/jdk1.8.0_211" >> /etc/profile.d/jdk8.sh
echo "export CLASS_PATH=.:\$JAVA_HOME/lib/dt.jar:\$JAVA_HOME/jar/tools.jar:\$JAVA_HOME/jre/lib" >> /etc/profile.d/jdk8.sh
echo "export PATH=\$JAVA_HOME/bin:\$JAVA_HOME/jre/bin:\$PATH" >> /etc/profile.d/jdk8.sh
echo "export LD_LIBRARY_PATH=\$LD_LIBRARY_PATH:/usr/local/apr/lib" >> /etc/profile.d/jdk8.sh

chmod +x /etc/profile.d/jdk8.sh
source /etc/profile.d/jdk8.sh
java -version

然后手动执行

source /etc/profile.d/jdk8.sh

关键字查询文件

grep -rn "aaa" /root/
grep -r "aaa" /root/
grep -Rn "data_chushou_pay_info" *.py #根据关键字过滤

centos7 lvm合并分区脚本初探-linux性能测试 -centos7修改网卡名字-jdk环境安装脚本-关键字查询文件-批量添加用户

批量添加用户

vi adduser.sh

#!/bin/bash

for name in $(more users.list)

do

if [ -n "$name" ];then

useradd -m $name

echo

echo $name"" | passwd --stdin "$name"

echo

echo "user $name's password change"

else

echo

echo 'The username is null'

fi

done

vi users.list

Jason

Miles

James
sh adduser.sh

删除用户脚本

#!/bin/bash

userdel $

cd /home/

rm -rf $

cd /var/spool/mail && rm -f $

另一种加用户方式

#!/bin/sh

for i in $(cat deyimingdan)

do

useradd $i

echo $i | passwd --stdin $i

chage -d  $i

        echo "$i        ALL=(ALL)       ALL" >> /etc/sudoers

done
chage -d 0 #表示密码立即过期需要修改密码

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