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文件: /usr/share/doc/util-linux/README.Debian
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Periodic fstrim for SSD disks ----------------------------- fstrim(8) is used on a mounted filesystem to discard blocks which are not in use by the filesystem. This is useful in particular for solid-state drives (SSDs). A systemd service and matching timer is available to periodically perform fstrim on relevant filesystems, but is *not* enabled by default. To enable it according to the default weekly cadence, just do the following as root: systemctl enable fstrim.timer
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