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| -rw-r--r-- | sys-utils/mount.8.adoc | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sys-utils/mount.8.adoc b/sys-utils/mount.8.adoc index 0279767f7..9a5479fe5 100644 --- a/sys-utils/mount.8.adoc +++ b/sys-utils/mount.8.adoc @@ -307,7 +307,9 @@ The *mount* command does not pass all command-line options to the **/sbin/mount. Command-line options available for the *mount* command are: *-a*, *--all*:: -Mount all filesystems (of the given types) mentioned in _fstab_ (except for those whose line contains the *noauto* keyword). The filesystems are mounted following their order in _fstab_. The *mount* command compares filesystem source, target (and fs root for bind mount or btrfs) to detect already mounted filesystems. The kernel table with already mounted filesystems is cached during *mount --all*. This means that all duplicated _fstab_ entries will be mounted. +Mount all filesystems (of the given types) mentioned in _fstab_ (except for those whose line contains the *noauto* keyword). This option was originally designed for use in init scripts. Note that many modern systemd-based distributions do not use *mount -a* on boot and instead mount filesystems in a more sophisticated way using systemd units. ++ +The filesystems are mounted following their order in _fstab_. The *mount* command compares filesystem source, target (and fs root for bind mount or btrfs) to detect already mounted filesystems. The kernel table with already mounted filesystems is cached during *mount --all*. This means that all duplicated _fstab_ entries will be mounted. + The correct functionality depends on _/proc_ (to detect already mounted filesystems) and on _/sys_ (to evaluate filesystem tags like UUID= or LABEL=). It's strongly recommended to mount _/proc_ and _/sys_ filesystems before *mount -a* is executed, or keep /proc and /sys at the beginning of _fstab_. + |