Section 8: administration and privileged commands
Burp – BackUp and Restore Program Synopsis burp [OPTIONS] Description BackUp and Restore Program. Server Options -c [path] Short for ‘config file’. The argument is a path to the config file. The default is /etc/burp/burp.conf. -n No forking mode. The program will accept a single query, deal with it, and then exit. This is useful…
bumblebee_selinux – Security Enhanced Linux Policy for the bumblebee processes Description Security-Enhanced Linux secures the bumblebee processes via flexible mandatory access control. The bumblebee processes execute with the bumblebee_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier. For example: ps -eZ | grep…
bugzilla_script_selinux – Security Enhanced Linux Policy for the bugzilla_script processes Description Security-Enhanced Linux secures the bugzilla_script processes via flexible mandatory access control. The bugzilla_script processes execute with the bugzilla_script_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier. For example: ps -eZ | grep…
buffchan – Buffered file-writing backend for INN Synopsis buffchan [-bru] [-c lines] [-C seconds] [-d directory] [-f num-fields] [-l lines] [-L seconds] [-m map] [-p pid-file] [-s format] Description buffchan reads lines from standard input and copies the initial fields in each line to the files named by the remaining fields on the line. buffchan…
btrfstune – tune various filesystem parameters Synopsis btrfstune [options] <device> [<device>…] Description btrfstune can be used to enable, disable, or set various filesystem parameters. The filesystem must be unmounted. The common usecase is to enable features that were not enabled at mkfs time. Please make sure that you have kernel support for the features. You…
btrfsctl – control a btrfs filesystem Synopsis btrfsctl [ -d file|directory ] [ -s snapshot-name directory ] [ -S subvolume-name directory ] [ -r [+-]size ] [ -A device ] [ -a ] [ -c ] Note B btrfsctl is deprecated. Please consider to switch to the btrfs utility. Description btrfsctl is used to control…
btrfs-check – check or repair a btrfs filesystem Synopsis btrfs check [options] <device> Description The filesystem checker is used to verify structural integrity of a filesystem and attempt to repair it if requested. It is recommended to unmount the filesystem prior to running the check, but it is possible to start checking a mounted filesystem…
btrfs – a toolbox to manage btrfs filesystems Synopsis btrfs <command> [<args>] Description The btrfs utility is a toolbox for managing btrfs filesystems. There are command groups to work with subvolumes, devices, for whole filesystem or other specific actions. See section COMMANDS. There are also standalone tools for some tasks like btrfs-convert or btrfstune that…
btrfs-rescue – Recover a damaged btrfs filesystem Synopsis btrfs rescue <subcommand> <args> Description btrfs rescue is used to try to recover a damaged btrfs filesystem. Subcommand chunk-recover [options] <device> Recover the chunk tree by scanning the devices Options -y assume an answer of yes to all questions. -v verbose mode. -h help. Note Since chunk-recover…
btrfs-subvolume – manage btrfs subvolumes Synopsis btrfs subvolume <subcommand> [<args>] Description btrfs subvolume is used to create/delete/list/show btrfs subvolumes and snapshots. Subvolume And Snapshot A subvolume is a part of filesystem with its own independent file/directory hierarchy. Subvolumes can share file extents. A snapshot is also subvolume, but with a given initial content of the…
btrfs-show – scan the /dev directory for btrfs partitions and print results. Synopsis btrfs-show Note btrfs-show is deprecated. Please consider to switch to the btrfs utility. Description btrfs-show is used to scan the /dev directory for btrfs partitions and display brief information such as lable, uuid, etc of each btrfs partition. Options none Availability btrfs-show…
btrfs-inspect-internal – query various internal information Synopsis btrfs inspect-internal <subcommand> <args> Description This command group provides an interface to query internal information. The functionality ranges from a simple UI to an ioctl or a more complex query that assembles the result from several internal structures. The latter usually requires calls to privileged ioctls. Subcommand dump-super…
btrfs-send – generate a stream of changes between two subvolume snapshots Synopsis btrfs send [-ve] [-p <parent>] [-c <clone-src>] [-f <outfile>] <subvol> [<subvol>…] Description This command will generate a stream of instructions that describe changes between two subvolume snapshots. The stream can be consumed by the btrfs receive command to replicate the sent snapshot on…
btrfs-select-super – overwrite primary superblock with a backup copy Synopsis btrfs-select-super -s number <device> Description Destructively overwrite all copies of the superblock with a specified copy. This helps in certain cases, for example when write barriers were disabled during a power failure and not all superblocks were written, or if the primary superblock is damaged,…
btrfs-scrub – scrub btrfs filesystem, verify block checksums Synopsis btrfs scrub <subcommand> <args> Description btrfs scrub is used to scrub a btrfs filesystem, which will read all data and metadata blocks from all devices and verify checksums. Automatically repair corrupted blocks if there’s a correct copy available. Note Scrub is not a filesystem checker (fsck)…
btrfs-restore – try to restore files from a damaged btrfs filesystem image Synopsis btrfs restore [options] <device> <path> | -l <device> Description btrfs restore is used to try to salvage files from a damaged filesystem and restore them into <path> or just list the subvolume tree roots. The filesystem image is not modified. If the…
btrfs-rescue – Recover a damaged btrfs filesystem Synopsis btrfs rescue <subcommand> <args> Description btrfs rescue is used to try to recover a damaged btrfs filesystem. Subcommand chunk-recover [options] <device> Recover the chunk tree by scanning the devices Options -y assume an answer of yes to all questions. -v verbose mode. -h help. Note Since chunk-recover…
btrfs-replace – replace devices managed by btrfs with other device. Synopsis btrfs replace <subcommand> <args> Description btrfs replace is used to replace btrfs managed devices with other device. Subcommand cancel <mount_point> Cancel a running device replace operation. start [-Bfr] <srcdev>|<devid> <targetdev> <path> Replace device of a btrfs filesystem. On a live filesystem, duplicate the data…
btrfs-receive – receive subvolumes from send stream Synopsis btrfs receive [options] <path> or btrfs receive –dump [options] Description Receive a stream of changes and replicate one or more subvolumes that were previously generated by btrfs send. The received subvolumes are stored to path, unless –dump option is given. If –dump option is specified, btrfs receive…
btrfs-quota – control the global quota status of a btrfs filesystem Synopsis btrfs quota <subcommand> <args> Description The commands under btrfs quota are used to affect the global status of quotas of a btrfs filesystem. The quota groups (qgroups) are managed by the subcommand btrfs qgroup(8). Note Qgroups are different than the traditional user quotas…