\ssh服务器/etc/init.d/sshd\stop|start|restart\netstattl可以查看ssh服务是否正在运行远程登录ssh：sshusername@hostnameeg:sshyangjia@localhost设置文件：/etc/ssh/sshd\_config(debian)

sshd config安全控制限制登录1、只允许某个IP登录，拒绝其他所有IP在 /etc/hosts.allow 写:sshd: 1.2.3.4在 /etc/hosts.deny 写:sshd: ALL用 iptables 也行:iptables A INPUT p

在/etc/profile文件改权限.然后在终端输入sudogedit/etc/profile.或者用root用户直接编辑.在文件末尾添加如下几句:exportJAVA\_HOME/usr/java/jdk1.5exportPATH$JAVA\_HOME/bin:$PATHexportCLASSPATH.:$J

准备主机1.centos7镜像2.node1:192.168.0.1013.node2:192.168.0.1024.node3:192.168.0.1035.vip:192.168.0.104配置ssh免密 并修改/etc/hosts跟/etc/hostname配置所

vi/etc/selinux/configThisfilecontrolsthestateofSELinuxonthesystem.SELINUXcantakeoneofthesethreevalues:enforcingSELinuxsecuritypo

apt源配置在/etc/apt/sources.list，首先备份一下：cd/etc/apt/cpsources.listsources.list.bak然后修改sources.list为：debhttp://mirrors.aliyun.com/ubuntu/xenialmainrest

1.修改时区tzselect!(https://oscimg.oschina.net/oscnet/upaf3994ceba21ea110ac0ca04f89e6099c20.png)2.修改/etc/profilevim/etc/profile

!(https://oscimg.oschina.net/oscnet/13ff950f13a554bfcf285c54c591c71149b.png)命令解释：◆sed2p/etc/passwd第二行打印了两次其余一次◆sedn'2p'/etc/passwd只打印出第二行◆sedn1,4p'/etc/passwd只打

1.显示/etc/passwd文件中以bash结尾的行123\root@www ~\ grep n '\\(bash\\)$' /etc/passwd1:root:x:0:0:root:/root:/bin/bash38:Allen:x:500:500:Allen.Huang:/hom

QCN6224ismainlyusedinthefieldofmobilecommunication,suchassmartphones,InternetofThingsdevices,etc.Supportedcommunicationstandards