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NixOS System Operations

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18 Apr 2026
@elvishjerricco:matrix.orgElvishJerriccohappy to help :)01:33:29
@sss:matrix.dark-alexandr.netsssis it possible to pass mount options for fs containing decryption key ?01:40:03
@sss:matrix.dark-alexandr.netsssi have keys on jfs wich is not mounting with defaults for some long time forgotten reason01:40:35
@elvishjerricco:matrix.orgElvishJerriccooh hm, maybe not01:41:03
@elvishjerricco:matrix.orgElvishJerriccouhhh01:41:13
@sss:matrix.dark-alexandr.netssswhich fs today is most apropriate to handle keys on small device (few mb) ?01:41:51
@elvishjerricco:matrix.orgElvishJerricco honestly when the FS is just for storing one key, I question if it should even be an FS; you could just use the partition itself as the key "file" 01:44:12
@sss:matrix.dark-alexandr.netsss* which fs today is most appropriate to handle keys on small device (few mb) ?01:42:56
@sss:matrix.dark-alexandr.netsss probably, but will keyFile understand it without custom script ? 01:46:31
@elvishjerricco:matrix.orgElvishJerriccoyes, at least with systemd initrd I know it will01:46:49
@sss:matrix.dark-alexandr.netssssounds interesting, where can i read about syntax ?01:47:47
@elvishjerricco:matrix.orgElvishJerricco well, basically the whole boot.initrd.luks.devices.<name> thing in NixOS is a frontend for /etc/crypttab, which has a man page 01:48:32
@elvishjerricco:matrix.orgElvishJerriccoer, in systemd initrd01:48:40
@elvishjerricco:matrix.orgElvishJerricco (in scripted initrd boot.initrd.luks.devices.<name> is a frontend for a bunch of scripting) 01:49:02
@sss:matrix.dark-alexandr.netsss so keyFile parameter is key-file from crypttab in case of systemd setup ? 01:52:54
@elvishjerricco:matrix.orgElvishJerriccoyep01:53:10
@sss:matrix.dark-alexandr.netsssunderstood, thx01:53:16
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20 Apr 2026
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21 Apr 2026
@sss:matrix.dark-alexandr.netsss ElvishJerricco it seems systemd is able to guess correct mount options for my jfs partitions with a keys (or maybe problem resolved in kernel fs implementation) so now i have working simplified config 11:26:19
@elvishjerricco:matrix.orgElvishJerricco sss: oh, neat. I'm guessing it's util-linux's mount that's doing any magic mount options then, but who knows 14:09:29
22 Apr 2026
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25 Apr 2026
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18 Mar 2024
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