V.T. Eric Layton Posted January 21, 2020 Share Posted January 21, 2020 I learned a new disk command today. Very interesting. What rock have I been under? vtel57@ericsbane07~:$ lsblk -f NAME FSTYPE LABEL UUID MOUNTPOINT fd0 sda |-sda1 ext4 6fef022f-2894-4d50-9bb9-7b79ed1018e3 / |-sda2 ext4 75e5b42f-9c48-49de-afec-7b732cadde8f /home |-sda3 ext4 113fd1e9-5401-44a6-81cc-deede5d00efd /home/vtel57/vtel57_storage `-sda4 swap ba80d646-bf62-4085-8056-08fa95f750b4 [SWAP] sdb |-sdb1 ext4 91d27734-7f70-41e5-aa07-be5e74aa8471 |-sdb2 ext4 1627143c-42aa-492c-808c-6481bd210db4 |-sdb3 ext4 cd7a174b-0248-4162-95bc-4023e2696f8a `-sdb4 swap 04d779a7-09eb-456d-b2ec-cdffe5b525cb [SWAP] sdc |-sdc1 ntfs ECB0640BB063DB1A `-sdc2 vfat 15B3-8531 /home/vtel57/vtel57_common sdd |-sdd1 ntfs ECB0640BB063DB1A `-sdd2 vfat 15B3-8531 sr0 sr1 1 1 Quote Link to comment Share on other sites More sharing options...
saturnian Posted January 21, 2020 Share Posted January 21, 2020 Very nice, thank you! I use the lsblk command all the time, but without any options. lsblk -f will be what I'll use going forward! 2 Quote Link to comment Share on other sites More sharing options...
amenditman Posted January 21, 2020 Share Posted January 21, 2020 I bet you knew it once and forgot. Re-learn daily. That's my procedure. 3 Quote Link to comment Share on other sites More sharing options...
V.T. Eric Layton Posted January 21, 2020 Author Share Posted January 21, 2020 7 minutes ago, amenditman said: I bet you knew it once and forgot. Re-learn daily. That's my procedure. Heh! Good possibility. It's also the same reason old stale jokes I've heard a thousand times are still funny... cuz, I don't remember the punchlines. Quote Link to comment Share on other sites More sharing options...
V.T. Eric Layton Posted January 21, 2020 Author Share Posted January 21, 2020 Oh, and for those interested... $man lsblk Quote Name lsblk - list block devices Synopsis lsblk [options] lsblk [options] device... Description lsblk lists information about all or the specified block devices. The lsblk command reads the sysfs filesystem to gather information. The command prints all block devices (except RAM disks) in a tree-like format by default. Use lsblk --help to get a list of all available columns. The default output as well as default output from options like --topology and --fs is subject to change, so whenever possible you should avoid using default outputs in your scripts. Always explicitly define expected columns by --output columns in environment where a stable output is required. Options -a, --all lsblk does not list empty devices by default. This option disables this restriction. -b, --bytes Print the SIZE column in bytes rather than in human-readable format. -d, --nodeps Don't print device holders or slaves. For example "lsblk --nodeps /dev/sda" prints information about the sda device only. -D, --discard Print information about the discard (TRIM, UNMAP) capabilities for each device. -e, --exclude list Exclude the devices specified by a comma-separated list of major device numbers. Note that RAM disks (major=1) are excluded by default. The filter is applied to the top-level devices only. -I, --include list Include devices specified by a comma-separated list of major device numbers only. The filter is applied to the top-level devices. -f, --fs Output info about filesystems. This option is equivalent to "-o NAME,FSTYPE,LABEL,MOUNTPOINT". The authoritative information about filesystems and raids is provided by the blkid(8) command. -h, --help Print a help text and exit. -i, --ascii Use ASCII characters for tree formatting. -m, --perms Output info about device owner, group and mode. This option is equivalent to "-o NAME,SIZE,OWNER,GROUP,MODE". -l, --list Use the list output format. -n, --noheadings Do not print a header line. -o, --output list Specify which output columns to print. Use --help to get a list of all supported columns. -P, --pairs Use key="value" output format. All potentially unsafe characters are hex-escaped (\x<code>). -r, --raw Use the raw output format. All potentially unsafe characters are hex-escaped (\x<code>) in NAME, KNAME, LABEL, PARTLABEL and MOUNTPOINT columns. -s, --inverse Print dependencies in inverse order. -t, --topology Output info about block device topology. This option is equivalent to "-o NAME,ALIGNMENT,MIN-IO,OPT-IO,PHY-SEC,LOG-SEC,ROTA,SCHED,RQ-SIZE". -V, --version Output version information and exit. Notes For partitions, some information (e.g. queue attributes) is inherited from the parent device. The lsblk needs to be able to lookup sysfs path by major:minor, which is done done by using /sys/dev/block. The block sysfs appeared in kernel 2.6.27 (October 2008). In case of problem with new enough kernel check that CONFIG_SYSFS was enabled at the time of kernel build. Authors Milan Broz <mbroz@redhat.com> Karel Zak <kzak@redhat.com> 1 Quote Link to comment Share on other sites More sharing options...
sunrat Posted January 21, 2020 Share Posted January 21, 2020 Nice, I'll be using that in future. In siduction it also shows disk usage: roger@siduction-brain2:~$ lsblk -f NAME FSTYPE LABEL UUID FSAVAIL FSUSE% MOUNTPOINT sda ├─sda1 ntfs WIN7 677EE28C54F5FC0F ├─sda2 ext4 45a5cc41-596c-4783-b066-8609f04c28a6 2.6G 82% / ├─sda3 swap ee8c3db0-ccee-40ef-93b1-1a244e7ecb19 [SWAP] ├─sda4 ├─sda5 ext4 eaa79911-410b-4d2d-86e9-c271bab29f5f └─sda6 ext4 73db6bc2-7ceb-4a53-9103-e7eb6c3f8f88 sdb ├─sdb1 ntfs win-stash 4E25F0444084DA77 ├─sdb2 ntfs win-progs 69B1A5EF6A01E52F └─sdb3 ext4 stash 11c68f17-0fc7-4413-92e5-99a5021197bf 169.9G 53% /mnt/stash sdc └─sdc1 ext3 music 7605433f-5c96-4d6c-bb11-a1818eda16d4 126.5G 81% /mnt/music sr0 1 Quote Link to comment Share on other sites More sharing options...
securitybreach Posted January 21, 2020 Share Posted January 21, 2020 Wait.. how did you not know about lsblk -f? I have been using that for well over a decade. I use it on every arch install so that I know where to install to. 1 Quote Link to comment Share on other sites More sharing options...
securitybreach Posted January 21, 2020 Share Posted January 21, 2020 40 minutes ago, amenditman said: I bet you knew it once and forgot. Re-learn daily. That's my procedure. That has to be it. I refuse to believe that he didn't know lsblk. 1 Quote Link to comment Share on other sites More sharing options...
sunrat Posted January 21, 2020 Share Posted January 21, 2020 I always used it with no options. I just experimented with options to get it to show SIZE as well. lsblk -mf works well but has several columns I didn't want. Tried with -o and a list of columns but didn't get there with that. This little exercise did remind me I have about 100GB of redundant data in sdb. 2 Quote Link to comment Share on other sites More sharing options...
saturnian Posted January 21, 2020 Share Posted January 21, 2020 I'm surprised that I've been using lsblk all this time and never knew about lsblk -f. I'm not sure that I ever looked at man lsblk before today. One switch (for a different command) that I'm sure I knew before but had forgotten about until I saw it today: the -r switch for repo info with inxi. For example, inxi -Fr, or inxi -br. 2 Quote Link to comment Share on other sites More sharing options...
ebrke Posted January 21, 2020 Share Posted January 21, 2020 Interesting. It gives only the mount points unless I use su, then it gives fstype and uuid. Thanks, Eric. 2 Quote Link to comment Share on other sites More sharing options...
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