Commands tagged partition (26)

  • Show all detected mountable Drives/Partitions/BlockDevices

    Yields entries in the form of "/dev/hda1" etc. Use this if you are on a new system and don't know how the storage hardware (ide, sata, scsi, usb - with ever changing descriptors) is connected and which partitions are available. Far better than using "fdisk -l" on guessed device descriptors. Show Sample Output


    13
    hwinfo --block --short
    Schneckentreiber · 2009-04-24 11:13:31 4
  • Show the UUID of a filesystem or partition

    Shows the UUID of the given partition (here /dev/sda7). Doesn't need to be root. Show Sample Output


    9
    blkid /dev/sda7
    lineak · 2010-09-05 12:20:45 1
  • Mount a partition from within a complete disk dump

    Suppose you made a backup of your hard disk with dd: dd if=/dev/sda of=/mnt/disk/backup.img This command enables you to mount a partition from inside this image, so you can access your files directly. Substitute PARTITION=1 with the number of the partition you want to mount (returned from sfdisk -d yourfile.img). Show Sample Output


    8
    INFILE=/path/to/your/backup.img; MOUNTPT=/mnt/foo; PARTITION=1; mount "$INFILE" "$MOUNTPT" -o loop,offset=$[ `/sbin/sfdisk -d "$INFILE" | grep "start=" | head -n $PARTITION | tail -n1 | sed 's/.*start=[ ]*//' | sed 's/,.*//'` * 512 ]
    Alanceil · 2009-03-06 21:29:13 2
  • Display disk partition sizes


    8
    lsblk -o name,size
    justsomeguy · 2022-03-04 04:29:47 0
  • See size of partitions as human readable

    See size of partitions as human readable and get extra informations about hdd and partitions Show Sample Output


    5
    parted /dev/sda print
    mesuutt · 2012-06-05 09:11:06 0
  • Mount a partition from within a complete disk dump

    Instead of calculating the offset and providing an offset option to mount, let lomount do the job for you by just providing the partition number you would like to loop mount.


    4
    lomount -diskimage /path/to/your/backup.img -partition 1 /mnt/foo
    olorin · 2009-07-22 11:32:52 1
  • Mount partition from image (without offset mount)


    4
    losetup /dev/loop0 harddrive.img; kpartx -a -v /dev/loop0; mount /dev/mapper/loop0p1 /mountpoint/
    oernii3 · 2010-10-30 11:52:11 3
  • detect partitions

    Shows all block devices in a tree with descruptions of what they are.


    4
    lsblk -o NAME,TYPE,FSTYPE,LABEL,SIZE,MODEL,MOUNTPOINT
    BasketCase · 2012-09-12 15:30:25 0
  • Display disk partition sizes

    It is the same but more faster real 0m0,007s user 0m0,011s sys 0m0,000s with my solution real 0m0,038s user 0m0,044s sys 0m0,000s with your solution :) Show Sample Output


    3
    lsblk | grep -v part | awk '{print $1 "\t" $4}'
    gecco · 2022-01-11 13:31:04 0
  • copy partition table from /dev/sda to /dev/sdb


    2
    sfdisk -d /dev/sda | sed 's/sda/sdb/g' | sfdisk /dev/sdb
    kobayashison · 2009-12-22 23:35:30 0
  • Report full partitions from a cron

    Reports all local partitions having more than 90% usage. Just add it in a crontab and you'll get a mail when a disk is full. (sending mail to the root user must work for that) Show Sample Output


    2
    df -l | grep -e "9.%" -e "100%"
    dooblem · 2010-04-26 17:57:54 0
  • Recover deleted Binary files

    The above command assumes the lost data is on /dev/sda and you previously issued the following command to mount _another_ disk or partition (/dev/sdb1) on /recovery sudo mount /dev/sdb1 /recovery If you don't do this, the data could be overwrited! foremost is a very powerful carving tool. By default foremost recovers all known file types. If you want to reduce the amount of files that are recovered you can specify the file type you are looking for. Read the man page to know the available file types. i.e to recover JPEG pictures append to foremost the switch -tjpg


    2
    sudo foremost -i /dev/sda -o /recovery
    vlan7 · 2010-08-19 22:27:41 0
  • Remount an already-mounted filesystem without unmounting it

    Necessary for fsck for example. The remount functionality follows the standard way how the mount command works with options from fstab. It means the mount command doesn't read fstab (or mtab) only when a device and dir are fully specified. After this call all old mount options are replaced and arbitrary stuff from fstab is ignored, except the loop= option which is internally generated and maintained by the mount command. It does not change device or mount point.


    2
    mount -o remount,ro /dev/foo /
    vlan7 · 2010-10-30 03:51:53 1
  • detect partitions

    `blkid` is an interface to libuuid - it can read Device Mapper, EVMS, LVM, MD, and regular block devices. -c /dev/null - Do not use cached output from /etc/blkid.tab or /etc/blkid/blkid.tab (RHEL) -i - Display I/O Limits (aka I/O topology) information (not available in RHEL) -p - Low-level superblock probing mode (not available in RHEL) Show Sample Output


    2
    blkid -c /dev/null
    mhs · 2012-09-12 13:34:41 2
  • Find partition name using mount point

    lsblk | grep mountpoint Show Sample Output


    2
    lsblk | grep <mountpoint>
    totti · 2014-02-05 09:41:00 1
  • Display disk partition sizes

    Use lsbk (list block) and jq (to manipulate a JSON on the command line) to display partition information: Show Sample Output


    2
    lsblk --json | jq -c '.blockdevices[]|[.name,.size]'
    mikhail · 2021-12-22 22:31:07 0
  • copy partition table from /dev/sda to /dev/sdb


    1
    sfdisk -d /dev/sda | sfdisk /dev/sdb
    wincus · 2010-02-03 14:49:07 0
  • Check if you partition are aligned

    To get most of you HDD/SSD driver you need to make sure you partition are aligned, if not the speed penalty can be up to 50% slower! this simple one liner will check to see if each partition start sector is divided by 512 you need to change sda with your driver if you find the one of your partitions is not aligned use gparted to move the start sector of the partition to be divided of 512 Show Sample Output


    1
    fdisk -l /dev/sda | grep -E sda[0-9]+ | sed s/*// | awk '{printf ("%s %f ",$1,$2/512); if($2%512){ print "BAD" }else {print "Good"} }' | column -t
    The_IceMan_Blog · 2012-05-18 08:34:36 1
  • Show the UUID of a filesystem or partition

    Show the UUID-based alternate device names of ZEVO-related partitions on Darwin/OS X. Adapted from the lines by dbrady at http://zevo.getgreenbytes.com/forum/viewtopic.php?p=700#p700 and following the disk device naming scheme at http://zevo.getgreenbytes.com/wiki/pmwiki.php?n=Site.DiskDeviceNames Show Sample Output


    1
    ls /dev/disk* | xargs -n 1 -t sudo zdb -l | grep GPTE_
    grahamperrin · 2012-10-06 20:19:45 0
  • Mount file system using back-up superblock

    Found on http://www.cyberciti.biz/faq/linux-find-alternative-superblocks/


    1
    mount -o sb=98304 /dev/sda5 /mnt/data5
    rugina · 2013-06-25 08:50:44 0
  • create ext4 filesystem with big count of inodes

    XX is your device partition number like /dev/sdc1 . to see how many inodes your partition have type: df --inodes (or df -i) Default formatting with ext4 would create small inode count for the new partition if you need big count of inodes is the fstype news the correct one. in debian you can see which fstype exists as template in: vim /etc/mke2fs.conf if you format default ext for a partition size with 1TB you would get 1 Million inodes (not enough for backupStorages) but if you format with fstype news you would get hunderd of millions of inodes for the partition. you have tune /etc/sysctl.conf also with following sysconfig parameters fs.file-max = XXX fs.nr_open = XXX where XXX is the count of max inodes for whole system


    1
    mkfs.ext4 -T news /dev/sdcXX
    aysadk · 2019-07-02 13:31:23 0
  • Partition a new disk as all one partition tagged as LINUX_NATIVE

    Creates a single primary partition starting at sector 0 and extending to the end of the disk. Use with care.


    0
    echo "0,,L" | sfdisk /dev/sdX
    twobitsprite · 2012-04-09 18:36:24 0
  • fsarchiver - probe disks and partitions

    Another alternative to blkid, lsblk, file -s, cat /proc/paritions, fdisk -l, etc.. Show Sample Output


    0
    fsarchvier probe simple
    0xFF · 2013-04-28 10:16:18 0
  • List partition superblocks


    0
    sudo dumpe2fs /dev/sda1 | grep superblock
    rugina · 2013-06-25 08:48:49 0
  • detect partitions

    List all disks and all of their partitions on OS X. http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man8/diskutil.8.html Show Sample Output


    -1
    diskutil list
    grahamperrin · 2012-10-06 21:18:27 0
  •  1 2 > 

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

prevent large files from being cached in memory (backups!)
We all know... $ nice -n19 for low CPU priority.   $ ionice -c3 for low I/O priority.   nocache can be useful in related scenarios, when we operate on very large files just a single time, e.g. a backup job. It advises the kernel that no caching is required for the involved files, so our current file cache is not erased, potentially decreasing performance on other, more typical file I/O, e.g. on a desktop.   http://askubuntu.com/questions/122857 https://github.com/Feh/nocache http://packages.debian.org/search?keywords=nocache http://packages.ubuntu.com/search?keywords=nocache   To undo caching of a single file in hindsight, you can do $ cachedel   To check the cache status of a file, do $ cachestats

(Git) Revert files with changed mode, not content
I sometimes (due to mismanagement!) end up with files in a git repo which have had their modes changed, but not their content. This one-liner lets me revert the mode changes, while leaving changed-content files be, so I can commit just the actual changes made.

Get your outgoing IP address

Find the package that installed a command

Extract title from HTML files
This command can be used to extract the title defined in HTML pages

Renames all files in the current directory such that the new file contains no space characters.
This is a better version, as it does no command piping, uses for instead of while loops, which allows for a list of files in the current working directory to be natively processed. It also uses the -v/verbose option with mv to let you know what the command is doing. While the command does exactly the same in a better way, I would modify the sed option to replace spaces with underscores instead, or dashes. Please note that you'll receive errors with this command as it tries to rename files that don't even have spaces. This is an alternative to: http://www.commandlinefu.com/commands/view/8761/renames-all-files-in-the-current-directory-such-that-the-new-file-contains-no-space-characters.

Extract a IRC like chat log out of an Adium xml logfile

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

split a file by a specific number of lines
Splits the file "my_file" every 500 lines. Will create files called xx01 xx02 and so on. You can change the prefix by using the -f option. Comes in handy for splitting logfiles for example. I am using it for feeding a logfile parser with smaller files instead of one big file (due to performance reasons)

Sort a character string
Sorts a character string, using common shell commands.

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for: