How many minutes does it take to reboot Linux using the reboot command?

How long does it take for the Linux reboot command reboot to complete?

The reboot command is used to restart the Linux system. Reboot time depends on the following factors:

• System configuration: Processor speed, memory capacity, and disk I/O performance.
• Start services: The number of services loaded and running when the system starts.
• File system check: During the restart process, the system may perform a file system check (such as fsck), which will affect startup time.

Generally speaking, the restart time is as follows:

• Mid-range servers: 3-5 minutes
• High-performance workstations: 2-3 minutes
• Low-end virtual machines: 5-10 minutes
• With a large number of startup services System: May take more than 10 minutes

The following are some additional factors that affect reboot time:

• INIT System: Systemd usually starts faster than SysVinit.
• Disk Type: Solid State Drive (SSD) is faster than mechanical hard drive (HDD).
• Boot mode: UEFI boot is usually faster than BIOS.

Tip:

• You can optimize the startup service in the /etc/init/rc-sysinit.conf file.
• Use the noatime or relatime option to mount the file system to reduce file system check time.
• Use SSD or enable NVMe to improve disk I/O performance.

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