很多时候我们都会忘记Linux root 用户的口令,下面就教大家如果忘记root口令怎么办 第1步:开机后在内核上按“e”。截图如下 按e以后会进入内核启动页面,如下图 第2步:在linux16这行的后面输入“rd.break console=tty0”然后按“ctrl+x“如下图 第3步:按完ctry+x 后进入到了系统的紧急求援模式,如下图: ] 第4步:依次输入以下命令: #mount –o remount,rw /sysroot #chroot /sysroot #passwd 修改root密码 #touch /.autorelabel 如下图: 然后输入命令: #exit #exit 输完以后,系统会重启,输入我们刚才配置的密码就行,如下图: 需要注意的是,密码提示修改成功后一定要输入touch /.autorelabel命令,否则会无效 centos7忘记登录密码修改 centos
1、查看firewall服务状态 systemctl status firewalld 2、查看firewall的状态 firewall-cmd --state **3、开启、**重启、关闭、firewalld.service服务 # 开启 service firewalld start # 重启 service firewalld restart # 关闭 service firewalld stop 4、查看防火墙规则 firewall-cmd --list-all 5、查询、开放、关闭端口 # 查询端口是否开放 firewall-cmd --query-port=8080/tcp # 开放80端口 firewall-cmd --permanent --add-port=80/tcp # 移除端口 firewall-cmd --permanent --remove-port=8080/tcp #重启防火墙(修改配置后要重启防火墙) firewall-cmd --reload # 参数解释 1. firwall-cmd:是Linux提供的操作firewall的一个工具;.... 有更新! Centos7.3防火墙配置 linux
If it is slow to log in from other servers on the same network segment, it means that the problem may be caused by the server itself rather than the network. Then at this time, from other servers on the same network segment: Ssh -vvv target IP address The target ip address is the ip address of the server where ssh was slow in the past. Check where the card owner is through the output debug3: send packet: type 50 debug2: we sent a password packet, wait for reply debug3: receive packet: type 52.... CentOS7.4 is particularly slow when connecting to the server via ssh linux