VPS被关了如何打开？这些方法你必须知道！

在VPS服务器（虚拟专有服务器）出现问题时，尤其是被管理员关机后，用户可能会感到困惑和焦虑，如何快速恢复VPS服务器，让它重新运行，是每个VPS用户都必须掌握的技能，本文将为你详细讲解VPS被关机后如何恢复，让你轻松解决问题。

VPS被关机的常见原因

在VPS被关机前,系统可能会给出一些错误提示，这些提示可以帮助你快速定位问题，从而更快地解决问题，以下是一些常见的VPS被关机原因：

系统或服务错误

系统提示错误提示,如system error，通常意味着系统出现了问题，可能的原因包括：

• 系统崩溃：服务器在运行过程中突然崩溃，导致系统无法正常启动。
• 软件冲突：某个软件或插件与系统发生冲突，导致系统无法正常运行。
• 硬件问题：硬件设备（如CPU、内存、硬盘）出现故障，导致系统无法正常运行。

网络问题

如果VPS被关机,但你无法连接到互联网，可能是因为网络问题，检查以下几点：

• 网络连接：确保你的VPS有稳定的互联网连接。
• 防火墙设置：检查防火墙设置，确保允许必要的端口开放。
• 网络适配器：网络适配器是否损坏或配置错误。

磁盘问题

如果VPS被关机,但你无法访问文件系统，可能是因为磁盘出现了问题，检查以下几点：

• 磁盘空间不足：确保磁盘空间足够，避免因文件无法删除而被系统回收而导致的问题。
• 磁盘损坏：检查磁盘是否损坏，可以通过工具如df查看磁盘使用情况，或者使用lsblk检查磁盘分区状态。

用户权限问题

如果VPS被管理员关机,可能是管理员设置了严格的权限限制，检查以下几点：

• 用户权限：确保你的账户有权限访问VPS。
• 组权限：检查是否有组权限限制，可能需要提升组权限。

系统配置问题

如果VPS被关机,但你无法重新登录，可能是因为系统配置错误，检查以下几点：

• 系统设置：检查系统设置，确保没有禁用必要的服务。
• 软件版本：确保软件版本与系统版本兼容。

如何恢复VPS服务器

通过命令行登录

如果你已经连接到VPS的控制面板,可以通过命令行方式恢复系统，以下是常见的恢复方法：

1 检查系统提示

打开终端,输入以下命令，查看系统提示：

systemctl status

如果系统提示为Press any key to continue...，说明系统正在修复问题，你可以按任意键继续。

2 提升组权限

如果系统提示为Access denied，可能是因为组权限限制，可以通过以下命令提升组权限：

sudo chown -R $USER:root /var/lib/sudo
sudo chown -R $USER:root /etc/passwd
sudo chown -R $USER:root /etc/shadow
sudo chown -R $USER:root /etc/sysupgrade.conf

3 重新启动服务

如果系统提示为System error: ..., 可能是因为某个服务崩溃，可以通过以下命令重新启动服务：

sudo systemctl restart [service-name]

如果mysql服务崩溃，输入：

sudo systemctl restart mysql

4 重装系统

如果以上方法无效,可能需要重装系统，以下是重装系统的方法：

sudo apt update
sudo apt upgrade -y
sudo apt dist-upgrade -y
sudo apt install -y buster
sudo chgpass:root
sudo chgpass:oldpass
sudo chgpass:admin
sudo chgpass:other
sudo apt autoremove
sudo rm -rf /var/lib/apt/lists/
sudo /etc/debian_version
sudo update Ca-certificates -q
sudo update ca-certificates -q
sudo rm -rf /var/lib/apt/lists/
sudo update -q ca-certificates
sudo update -q ./etc/shadow
sudo update -q ./etc/passwd
sudo update -q ./etc/sysupgrade.conf
sudo update -q ./etc/sysupgrade.conf
sudo update -q ./etc/shadow
sudo update -q ./etc/passwd
sudo update -q ./etc Ca-certificates
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