[Solved] ping requires root privilages but only if OS run from RAM

KairiTech · 2014-08-22 01:56:50

I have an odd situation where I can use ping as a regular user from openbox's autostart if I run the OS from storage disks but not if I load the OS into RAM. It only works for a regular user with the OS loaded to RAM when I set the sticky bit.

Can this be a timing problem with systemd not activating a required service in time?

Last edited by KairiTech (2014-08-26 21:16:45)

falconindy · 2014-08-26 03:08:54

Whatever you're using to copy to RAM must not preserve capabilities. ping relies on having cap_net_admin (for SOCK_RAW) in order for non-root users to make use of it.

Last edited by falconindy (2014-08-26 13:54:33)

KairiTech · 2014-08-26 20:03:26

Yep! That's it exactly. I create a root file system archive to speed the loading into RAM. See the exact code below:

sudo tar -vzcf /rootfs.tar.gz / --exclude={/rootfs.tar.gz,/boot/*,/var/cache/pacman/pkg/*,/dev/*,/proc/*,/sys/*,/tmp/*,/run/*,/mnt/*,/media/*,/lost+found}

Adding the --xattrs option to tar solved it.

Last edited by KairiTech (2014-08-26 21:17:46)

dulinux · 2024-03-18 23:18:29

I was having this issue in an archlinux incus container image.

This solved the issue:

setcap 'cap_net_raw+p' /usr/bin/ping

ewaller · 2024-03-19 02:12:47

Closing this 10 year old thread

Arch Linux

#1 2014-08-22 01:56:50

[Solved] ping requires root privilages but only if OS run from RAM

#2 2014-08-26 03:08:54

Re: [Solved] ping requires root privilages but only if OS run from RAM

#3 2014-08-26 20:03:26

Re: [Solved] ping requires root privilages but only if OS run from RAM

#4 2024-03-18 23:18:29

Re: [Solved] ping requires root privilages but only if OS run from RAM

#5 2024-03-19 02:12:47

Re: [Solved] ping requires root privilages but only if OS run from RAM

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