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| author | Karel Zak <kzak@redhat.com> | 2025-10-22 10:42:36 +0200 |
|---|---|---|
| committer | Karel Zak <kzak@redhat.com> | 2025-10-22 10:42:36 +0200 |
| commit | d59e09cc0fb98268196cbf48080a74094e69d1a6 (patch) | |
| tree | c87a793a6d394f6326a8ffac0d530f78d2e7a6bb | |
| parent | be33a6786b82dc456be347d2b366661100101793 (diff) | |
| download | util-linux-d59e09cc0fb98268196cbf48080a74094e69d1a6.tar.gz | |
mount: add note about systemd and --all historical context
Add information that mount -a was originally designed for init scripts
but many modern systemd-based distributions use systemd units instead
for mounting filesystems on boot in a more sophisticated way.
Signed-off-by: Karel Zak <kzak@redhat.com>
| -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 0279767f70..9a5479fe54 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_. + |