LinuxMirrors/docs/use/help.md

关于开启 SSH 远程登录的方法

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- ### 验证是否已安装 `SSH` 服务

    ``` bash
    ls /etc | grep ssh
    ```
    > 如果没有这个文件夹说明系统未安装 `SSH` 服务，你需要通过包管理工具安装 `openssh` 软件包

- ### 设置允许 Root 用户登录

    ``` bash
    cat /etc/ssh/sshd_config | grep -Eq "^[# ]?PermitRootLogin " ; [ $? -eq 0 ] && sed -i 's/^[# ]\?PermitRootLogin.*/PermitRootLogin yes/g' /etc/ssh/sshd_config || echo -e "\nPermitRootLogin yes" >> /etc/ssh/sshd_config
    ```

- ### 设置密码认证

    ``` bash
    cat /etc/ssh/sshd_config | grep -Eq "^[# ]?PasswordAuthentication " ; [ $? -eq 0 ] && sed -i 's/^[# ]\?PasswordAuthentication.*/PasswordAuthentication yes/g' /etc/ssh/sshd_config || echo -e "\nPasswordAuthentication yes" >> /etc/ssh/sshd_config
    ```

- ### 启动/重启 `SSH` 服务

    ``` bash
    ps -ef | grep -q ssh ; [ $? -eq 0 ] && systemctl restart sshd || systemctl enable --now sshd
    ```

关于报错 Command not found

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- 如果提示 `Command 'curl' not found` 则说明当前未安装 `curl` 软件包

    === "Debian 系 Linux"

        ``` sh
        apt-get install -y curl
        ```

        > `Debian`   `Ubuntu`   `Kali`

    === "RedHat 系 Linux / OpenCloudOS / openEuler"

        ``` sh
        yum install -y curl || dnf install -y curl
        ```

        > `Red Hat Enterprise Linux`   `CentOS`   `Rocky Linux`   `AlmaLinux`   `Fedora`   `OpenCloudOS`   `openEuler`

    === "openSUSE"

        ``` sh
        zypper install curl
        ```

    === "Arch Linux"

        ``` sh
        pacman -S curl
        ```

还原已备份的软件源

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=== "Debian 系 Linux"

    ``` sh
    cp -rvf /etc/apt/sources.list.bak /etc/apt/sources.list
    apt-get update
    ```

    > `Debian`   `Ubuntu`   `Kali`

=== "RedHat 系 Linux / OpenCloudOS / openEuler"

    ``` sh
    cp -rvf /etc/yum.repos.d.bak /etc/yum.repos.d
    yum makecache
    ```

    > `Red Hat Enterprise Linux`   `CentOS`   `Rocky Linux`   `AlmaLinux`   `Fedora`   `OpenCloudOS`   `openEuler`

=== "openSUSE"

    ``` sh
    cp -rvf /etc/zypp/repos.d.bak /etc/zypp/repos.d
    zypper ref
    ```

=== "Arch Linux"

    ``` sh
    cp -rvf /etc/pacman.d/mirrorlist.bak /etc/pacman.d/mirrorlist
    pacman -Sy
    ```

其它

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- 如果提示 `bash: /proc/self/fd/11: No such file or directory`，请切换至 `Root` 用户执行，切换命令为 `su root`