From here:
$ loginctl $ loginctl show-session <SESSION_ID> -p Type
How to know whether Wayland or X11 is being used
Reply
Category Archives: Sys Admin
stat -c %a /tmp
So you can use `stat -c %a $path` to get the octal spec for use with `chmod`:
# stat -c %a /tmp 1777 # stat -c %a / 755
Disk setup/config reporting
Note to self: after configuring disks run the following commands to generate a report for the documentation:
- cat /proc/mdstat
- cat /etc/fstab
- zpool list
- zpool status
- zfs list
- zfs get dedup
- zfs get compression
Living life on the edge
Whoosh! There goes my redundancy! Fingers crossed I don’t lose another disk before the replacements arrive!
-------------------
Tue Nov 29 17:01:01 [bash:5.1.16 jobs:0 error:0 time:6361]
root@love:/home/jj5
# zpool status
pool: data
state: DEGRADED
status: One or more devices has been taken offline by the administrator.
Sufficient replicas exist for the pool to continue functioning in a
degraded state.
action: Online the device using 'zpool online' or replace the device with
'zpool replace'.
scan: scrub repaired 0B in 1 days 10:20:21 with 0 errors on Mon Nov 14 10:44:22 2022
config:
NAME STATE READ WRITE CKSUM
data DEGRADED 0 0 0
mirror-0 DEGRADED 0 0 0
sda ONLINE 0 0 0
9460704850353196665 OFFLINE 0 0 0 was /dev/sdb1
mirror-1 DEGRADED 0 0 0
2467357469475118468 OFFLINE 0 0 0 was /dev/sdc1
sdd ONLINE 0 0 0
cache
nvme0n1p4 ONLINE 0 0 0
errors: No known data errors
pool: fast
state: ONLINE
status: One or more devices has experienced an unrecoverable error. An
attempt was made to correct the error. Applications are unaffected.
action: Determine if the device needs to be replaced, and clear the errors
using 'zpool clear' or replace the device with 'zpool replace'.
see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-9P
scan: resilvered 2.70G in 00:01:35 with 0 errors on Tue Nov 29 13:28:02 2022
config:
NAME STATE READ WRITE CKSUM
fast ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
sde ONLINE 0 0 0
sdf ONLINE 0 0 1
cache
nvme0n1p3 ONLINE 0 0 0
errors: No known data errors
pool: temp
state: ONLINE
status: Some supported and requested features are not enabled on the pool.
The pool can still be used, but some features are unavailable.
action: Enable all features using 'zpool upgrade'. Once this is done,
the pool may no longer be accessible by software that does not support
the features. See zpool-features(7) for details.
scan: scrub repaired 0B in 00:21:59 with 0 errors on Sun Nov 13 00:46:02 2022
config:
NAME STATE READ WRITE CKSUM
temp ONLINE 0 0 0
nvme0n1p5 ONLINE 0 0 0
errors: No known data errors
-------------------
How To List All Packages In A Repository On Ubuntu
There’s some good info about working with the Ubuntu APT repository over here: How To List All Packages In A Repository On Ubuntu, Debian Or Linux Mint [APT]. I’m finally starting to get my head around how the repositories actually work. This and this were helpful.
Postfix Mail Queue Management
I seem to need to refer to this more often than I would have imagined: Postfix Mail Queue Management.
cheat.sh
This is great: cheat.sh. It’s a web accessible cheatsheet for Linux commands.
KDE widget date/time format
Date/Time formats for the KDE clock widget.
New KDE Plasma widgets
So I upgraded my Ubuntu from 20.04 to 22.04. That mostly went without problem but there are still a few gremlins to iron out. One change was some of the desktop widgets I was using in the previous version seem to have been replaced. I found the replacements easily enough. I particularly like the new CPU activity widget, it’s a much more sensible way to visualise 24 CPU cores than the previous widget which just gave one reading instead of 24.
