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What is the most duct-tape thing you've done to Linux? (lemm.ee)
submitted 4 months ago* (last edited 4 months ago) by squid_slime@lemm.ee to c/linux@lemmy.ml
188 comments fedilink hide all child comments

tell me the most ass over backward shit you do to keep your system chugging?
here's mine:
sway struggles with my dual monitors, when my screen powers off and back on it causes sway to crash.
system service 'switch-to-tty1.service'

[Unit]
Description=Switch to tty1 on resume
After=suspend.target

[Service]
Type=simple
ExecStart=/usr/local/bin/switch-to-tty1.sh

[Install]
WantedBy=suspend.target

'switch-to-tty1.service' executes '/usr/local/bin/switch-to-tty1.sh' and send user to tty1

#!/bin/bash
# Switch to tty1
chvt 1

.bashrc login from tty1 then kicks user to tty2 and logs out tty1.

if [[ "$(tty)" == "/dev/tty1" ]]; then
    chvt 2
    logout
fi

also tty2 is blocked from keyboard inputs (Alt+Ctrl+F2) so its a somewhat secure lock-screen which on sway lock-screen aren't great.

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[-] tibi@lemmy.world 1 points 4 months ago

Did it work? There's a huge chance of data corruption if you are copying the disk of a running system.

[-] cizra@lemm.ee 1 points 4 months ago

It didn't, but due to unrelated reasons. The root FS was mounted r/w, so the regular IO eventually overwhelmed the network's ability to copy stuff.

But no worries, a reboot later, with unmounted FS, I finished the same thing.

Copying the disk of a running system appears to be fine in LVM. Copying is done block-by-block, and the only thing it has to do to make it atomic is: in case of a conflict (writing into a block that's being copied right now), postpone writing to a block until it's copied, then finish the write in the new location. Or else, abort the copy, finish the write, then copy again.

this post was submitted on 21 Aug 2024
278 points (98.6% liked)

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