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1. 下载tar包并安装依赖shell> wget http://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-8.6p1.tar.gzshell> yum install -y gcc zlib-devel openssl-devel pam-devel libselinux-devel shell> tar zxvf openssh-8.6p1.tar.gz2.编译安装shell> openssh-8.

1. 备份home分区文件shell>tar cvf /tmp/home.tar /home2. 取消/home挂载shell>umount /homeshell>fuser -km /home //如果提示忙碌，执行此条终止3. 删除/home所在lvshell>lvremove /dev/mapper/centos-home4. 扩展/root所在的lvshell>lvextend -L +100G /dev/mapper/centos-root

1.Host A配置如下shell> ip tunnel add gre1 mode gre remote 172.17.1.2 local 172.17.1.1 ttl 255shell> ip link set gre1 upshell> ip addr add 2000::1/126 dev gre12.Host B配置如下shell> ip tunnel add gre1 mode gre remote 172.17.1.1 local 172.17.1.2

1.修改文件shell> vi /etc/httpd/conf/httpd.conf#Listen 12.34.56.78:80Listen 8000#将80改为所需端口，端口为80002.重启Apacheshell> systemctl restart httpd

1.下载papingshell> wget http://www.updateweb.cn/softwares/paping_1.5.5_x86-64_linux.tar.gz2.解压文件shell> tar zvxf paping_1.5.5_x86-64_linux.tar.gz3.执行脚本shell> ./paping –p port -c count 'a...

1.shell> curl ifconfig.me2.shell> host myip.opendns.com resolver1.opendns.com3.shell> dig +short myip.opendns.com @resolver1.opendns.com

1.查看默认密码shell> grep 'temporary password' /var/log/mysqld.log2.设置新密码mysql> SET PASSWORD = PASSWORD('your new password');3.密码永不过期mysql> ALTER USER 'root'@'localhost' PASSWORD EXPIRE NEVE...

1.停止mysql服务shell> service mysqld stop2.跳过登录密码启动shell> mysqld_safe --skip-grant-tables &3.进入mysqlshell> mysql4.更新密码mysql> UPDATE mysql.user SET Password=PASSWORD('NEW-PASSWORD...

1.dirty page 变为 clean pageshell> sync2.清理缓存①To free pagecache:仅清除页面缓存（PageCache）shell> echo 1 > /proc/sys/vm/drop_caches②To free dentries and inodes:清除目录项和inodeshell> echo 2 >...

1.fdisk查看磁盘信息shell> fdisk -l #查看磁盘情况2.fdisk 进入/dev/sda，创建新分区/dev/sda3shell> fdisk /dev/sdaCommand（m for help）：n #new新分区Command action e extend p primary partition(1-4) ...

1.安装firmware文件shell> rpm -Uvh linux-firmware-20180911-69.git85c5d90.el7.noarch.rpm(不同版本内核版本号有所不同)2.重新安装yum# yum安装内核时会提示缺少依赖文件,且Redhat为收费产品需注册使用yum源，因此卸载原有yum并重新安装①卸载原yumshell> rpm -aq|gr...

1.查看默认最大连接MariaDB [(none)]> show variables like 'max_connections';+-----------------+-------+| Variable_name | Value |+-----------------+-------+| max_connections | 151 |+---------------...

1.准备工作安装php，并已经配置好环境变量path2.运行hardware.sh获取机器码shell> php ./hardware.sh3.脚本内容#!/usr/bin/env php<?php function command_hardware() { if(function_exists('zend_loader_enabled'...

1 客户端阻止SSH超时shell> vi ~/.ssh/config，ServerAliveInterval 120 #每隔120秒给服务器发送一个“空包”，保持它们之间的连接。2 服务器端阻止SSH超时shell> vi /etc/ssh/sshd_configClientAliveInterval 120 #每隔120秒向客户端发送一个“空包”，以...