Linux Command

https://www.bilibili.com/video/av86058107

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~ 家目录符号  cd ~

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putty无密码登录CentOS https://www.tecmint.com/ssh-passwordless-login-with-putty/

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systemctl enable sshd

systemctl disable sshd

systemctl start sshd

systemctl stop sshd

journal xx

原文：https://www.cnblogs.com/chinaniit/p/12323689.html