Linux command
swapon 命令
文本
复制后可按需替换文件名、目录或参数。
常用示例
Example
swapon
Enable
sudo swapon /path/to/swapfile
Example
sudo swapon -a
Example
sudo swapon -L swap_label
Example
sudo swapon -U uuid
Example
swapon -s
说明
swapon enables devices and files for paging and swapping. Swap space can be specified by device path, label (-L), or UUID (-U). The command is typically invoked during system startup to distribute paging activity across multiple storage resources.
参数
- -a, --all
- Enable all swap devices marked in /etc/fstab
- -d, --discard=policy
- Enable trim/discard operations; policy can be 'once' or 'pages'
- -e, --ifexists
- Silently skip devices that do not exist
- -f, --fixpgsz
- Reinitialize swap space if page size mismatches kernel
- -L label
- Use swap partition with the specified label
- -U uuid
- Use swap partition with the specified UUID
- -p, --priority priority
- Set swap priority (-1 to 32767, higher is preferred)
- -s, --summary
- Display swap usage summary (deprecated, use --show)
- --show=column...
- Display customizable swap area table
- -T, --fstab path
- Use alternative fstab file
- -v, --verbose
- Enable verbose output
FAQ
What is the swapon command used for?
swapon enables devices and files for paging and swapping. Swap space can be specified by device path, label (-L), or UUID (-U). The command is typically invoked during system startup to distribute paging activity across multiple storage resources.
How do I run a basic swapon example?
Run `swapon` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
What does -a, --all do in swapon?
Enable all swap devices marked in /etc/fstab