What is the most duct-tape thing you've done to Linux?
https://lemm.ee/post/40221370
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sssd didn’t work well with my company’s AD server, which would cause repeated authentication failures until I restarted sssd. I rigged up a bash script which would restart sssd any time xscreensaver logged an auth fail.
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I regularly recommend configurations to peers that are arguably impossible for normal humans.
I love to run stuff on Raspberry Pi, and I fear no gcc compile flag. (Ok. That’s a bold faced lie, even I fear a couple of them.) So I frequently forget the bullshit I had to do to get something weird running on a random Pi.
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Prior to switching (upgrading?) to Wayland, Debian KDE crashed under X11 regularly when waking from hibernation. Restarting the plasma shell made it operatable again, so I created an alias and regularly rebooted the DE shell 2-3x a day:
alias damnTaskbar=‘killall plasmashell ; kstart plasmashell &’
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I still occasionally need to use one of these two
alias kplasma='plasmashell --replace & disown'
[#] when kwin crashes or acts weird
alias kbug='if [ "${XDG_SESSION_TYPE}" = "x11" ]; then kwin_x11 --replace & disown; else kwin_wayland --replace & disown; fi'
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Damn Taskbar is gold
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intel won’t allow its linux drivers to work above wifi 4 speeds in ap mode, so i created a kvm virtual windows machine with pci pass through on the wifi nic plus ip masquerade and now i’m getting wifi 6 speeds in ap mode.
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Oh god, this is horrible. I beg you to find a better solution 🙏
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it’s horrible in more ways that you would expect and what other solutions exist with intel hardware in ap mode on linux?
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this is beautiful
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it’s a pita every time something goes wrong.
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I think NDISwrapper is still maintained for issues like this.
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i wasn’t aware that you could use ndiswrapper on an access point; i’ll look into it.
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Lame. 😔
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Lots of laptops just use a removable m.2 wifi card. Have you considered replacing it with something thats properly supported? I know hardware costs money but not that much probably.
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This is the real solution, just stop using the built in stuff and free yourself
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It’s not a laptop and the hardware is fully capable of ap mode support in it’s older iteration if drivers; Intel made the decision to remove that capability.
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It’s not a laptop; it’s a mini desktop that I obtained to serve as a wifi router; storage server; firewall; VPN; media server; remote file storage; and my cat’s favorite warm napping surface.
the wifi nic is embedded on the motherboard and it was chosen since it included a high gain antenna; among other qualities.
Wifi works fine if you use it in ordinary client mode w full Linux support and the hardware is capable of fully supporting ap mode in older Linux kernels; it’s just that Intel decided remove higher speed ap mode support in the latest versions of the driver to force people to buy thier more expensive wifi nics.
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Ah okay thats the one kind of device where there is nothing you can really do true.
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it’s an ordinary desktop; the screwiness is introduced by intel’s decision to remove ap capability from its recent drivers.
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I've set Raspberry Pis to auto-reboot themselves at night if they are being used for headless network services that need to be available 24/7, just to clear out memory leaks or other things that may have gotten locked up. Not sure if that's duct tape or just a standard practice. They aren't the most stable things sometimes. They're known for power supply and SD card issues.
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I did this with my sensors running in Pi picos.
There was some wonkyness with some of the electrical stuff and since I have no idea how to debug that, I just restarted them every 24 hours and at start “drained” all pins by repeatedly reading from them.
I’m reasonably sure, this setup is cursed enough to kill an electrical engineer on sight, but it kind of works good-ish enough.
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Don’t remember the specifics but I had a key combo setup to force a soft reset in my DE. Occasionally a kernel or driver update would fuck up my video and make the system unusable but still live. I try to avoid hard resets.
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Actually really few instances of jerry rigging, but I do remember during my distro-hopping days where I used a binary gcc package to compile a more optimized binary of gcc. At the time, that felt pretty weird, but looking back I see why.
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Possibly my light/dark mode scripts. They change my Plasma theme, which is honestly most of the job, but also set the matching GTK theme, set the new theme in running Konsole sessions, do a bunch of manual sed edits on conf files for applications that don’t follow system theming, finally restarting plasmashell to clean up the occasional edge case where a tray icon is supposed to follow the theme but doesn’t.
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Oh yeah I do this, I’ll raise you that mine also sshs into my server to update the editor theme
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I’m rebooting my router every week via a crontab because some dynamic dns update process fails form time to time and I find it hanging. No time to debug the actual problem.
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I have an old laptop running some basic services.
I have taken it apart before to replace the hard drive with an SSD, but I never replaced the dead CMOS battery because you have to literally completely disassemble it to get at the battery.
So I have a cronjob that runs on startup to change the system clock to the right time-zone.
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Debian (and Ubuntu) has the package “fake-hwclock”. I’m sure other distros do too.
Periodically saves the time info to disk and resets the clock with it on boot.
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I ran chmod 777 /dev/uinput so AntiMicroX worked on Wayland. The PC was intented to be used as an HTPC. A Dualshock 3 would be the remote and KDE Plasma Bigscreen would be used to launch Linux native apps ie. Firefox and Android apps via Waydroid, hence the Wayland requirement. AntiMicroX would bind gamepad inputs to arrow keys, enter, ESC, volume up/down, mouse navigation, left/right click etc. The whole setup was duct tape, user unfriendly and it ultimately did not solve the problem that sent me down this rabbit hole: Internet was unstable even with an ethernet cable so it had no advantage over the crappy Android TV stick that had trouble streaming anything but Chromecast.
A close contender is having to disable Internet when launching a specific online only game otherwise performance halves.
There is also a guide I uploaded to Reddit that describes how to import ringtones from Linux to iOS that has 8 steps and involves rebooting your phone. And another guide to run 2 games at once and stream one of thrm while playing the other locally.
I have a problem with half working duct tape solıtions.
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Neat idea. Btw what’s that character you used in place of a “u” in “solıtions”? It looks an “i” lost its tittle
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In Turkish we have ı/I and i/İ instead of i/I. u is next to ı, I made a typo.
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Side of the case fell off.
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Had a Centos VM that kept slipping time. Every week it would loose about 30min. No amount of NTP syncing got the time correct until manual intervention.
Msp couldn’t work it out, couldn’t rebuild the server for infrastructure reasons, and only that server had the issue. The other 3 VMs on that host were fine.
Cron job on one server took it current time, sshed to the dodgy server and configured the correct time.
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Mounting a Samba share and moving my LVM pvolumes of / onto a losetup’ed file on it, while running the system. Bass ackwards.
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Good grief. Why?
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I needed to redo partitions, but didn’t want to reboot.
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That’s not even a bad idea then.
One of my machines has a boot partition that’s a bit too small, on an otherwise LVM setup.
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I’d recommend a Linux installer on a memory stick, instead. It’s bound to have less network lag.
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Nah, it’ll be fine.
I might have a large enough USB SSD laying around some where. I could probably use that instead.
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Does your FS support online resizing? EXT4 doesn’t, so you’d have to use an installer stick.
Be super careful about partition sizes. I once tried to shrink my FS to an exact size, then shrink the LV to the same size - it ended up corrupting my FS. After that time, I started undersizing the FS, then resizing LV, finally expanding the FS again.
Have backups.
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Does your FS support online resizing?
Yeah. I mainly use btrfs; it supports online growing and shrinking.
Be super careful about partition sizes. […]
I know. I have done plenty of same device partition resizing. I know the pit falls, and for safety shrink the FS to below what the LV is going to be.
Have backups.
Thanks for the reminder. I’ve been meaning to set up snapshot backups for this machine using rsnapshot as an experiment. I mainly use Dirvish
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I use rsync with a custom shell script to manage the number of incremental copies. You’ll probably prefer something less janky.
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That sounds pretty much like what Dirvish and rsnapshot do. Both wrap rsync.
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Did it work? There’s a huge chance of data corruption if you are copying the disk of a running system.
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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.
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On the client side of a relayd-based wireless bridge using OpenWrt, I discovered there’s a bug in relayd that made the process hang after it move so many gigs of data. I made a cron job that pings the network relayd makes accessible. If the ping fails, it nukes relayd. Of course this relies on a live machine to ping. If this machine dies for so e reason, the crown job would just keep killing relayd over and over again. 🥹
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Had a zfs array on an adaptec raid card. On reboot the partition table would get trashed and block the zfs pool from coming up, but running fdisk against the disk would recover it from the backup.
Had a script to run on reboot that just ran “fdisk -l” on every disk, then brought up the zfs pool. Worked great for years until I finally did a kernel upgrade that resolved it.
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This certainly isn’t of the same caliber as some of these other comments, but I found it to be fitting to the topic.
Last year I was having problems getting the game stellaris working on arch. (I use bazzite now, btw) My solution was the following:
If any one of those step was left out, it didn’t work. I’m no linux expert, so I didn’t have the skills to actuality find the real problem.
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Even when Proton doesn’t work, it still somehow works.
Magic.
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Indeed. Proton for the win yet again.
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I… What? Why does that work? How did you figure this out?
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Blind trial and error, mostly. Making the game folder read-only was the real “duct-tape” part, it occued to me to do that after steam kept “updating” the game and breaking my solution.
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I one crossgraded a debian server from x86 to x86_64.
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absolute madlad
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Bootstraping.
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I have a folder full of scripts tied to aliases that fix various things when they go wonky, and I’ve long since forgotten what any of them do. I just know if xxx app stops working, I type fix_xxx into the terminal and then it does a bunch of stuff and then it works again lol.
Also I have a bunch of aliases tied to common tasks, like e1 = reboot, e2 = shutdown etc. I have no idea where that habit came from.
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I dare you to try grep -Irn alias in your home dir.
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I’m not even sure what that would do! Presumably list every time the word alias appears in every file across the whole home directory or something like that?
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Rtfm!
No, seriously, -I avoids binaries, -r recursively, -n print matching file and line number.
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Alright, I’m gonna try it and see how long this takes!
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