Thanks for letting me know!
Hey there!
I just found this page while trying to find a solution about updating tailscale on my router.
I’ve read some of the posts here but I still can’t update it. I guess it’s because of storage? Although, it says that storage has 92mb free and the script asks for 83mb, so I don’t know.
Here is what it shows me in putty:
root@GL-AR750S:\~# wget -q https://get.admon.me/tailscale -O update-tailscale.sh
; sh update-tailscale.sh
ℹ️ Checking for script updates
✅ The script is up to date
OpenWrt/GL.iNet Tailscale Updater by Admon
Version: 2026.01.06.01
============================================================
WARNING: THIS SCRIPT MIGHT HARM YOUR ROUTER!
Use at your own risk. Only proceed if you know
what you're doing.
============================================================
Support this project:
- GitHub:
- Ko-fi: ko-fi
- Buy Me a Coffee: buymeacoffee
============================================================
ℹ️ Checking if prerequisites are met
✅ GL.iNet firmware version: 4
✅ Architecture: mips
✅ Available space: 83 MB
✅ xz is installed.
✅ wget is installed.
✅ Prerequisites are met.
ℹ️ Collecting user preferences before starting the update process
┌─────────────────────────────────────────────────────────────────────────────── ─┐
| Make Installation Permanent |
| This will make your tailscale installation persistent over firmware upgrades. |
| Please note that this is not officially supported by GL.iNet. |
| It could lead to issues, even if not likely. Just keep that in mind. |
| In worst case, you might need to remove the config from /etc/sysupgrade.conf |
└─────────────────────────────────────────────────────────────────────────────── ─┘
> Do you want to make the installation permanent? (y/N) n
┌──────────────────────────────────────────────────┐
| Are you sure you want to continue? (y/N) |
└──────────────────────────────────────────────────┘
y
ℹ️ Starting update process...
ℹ️ Detecting latest tiny tailscale version
ℹ️ The latest tailscale version is: 1.92.5-tiny.by.admon.1131
ℹ️ Downloading latest tailscale version
ℹ️ Creating backup of tailscale config
✅ Backup created: /root/tailscale_config_backup/2026-01-26_03-42-32.tar.gz
ℹ️ The binaries will not be backed up, you can restore them by using the --resto re flag.
ℹ️ Stopping tailscale
ℹ️ Moving tailscale to /usr/sbin
ℹ️ Removing temporary files
ℹ️ Starting tailscale
ℹ️ Not a GL.iNet router or gl_tailscale script not found, skipping GL-specific m odifications
ℹ️ Stopping tailscale
ℹ️ Starting tailscale
✅ Script finished successfully. The current tailscale version (software, daemon ) is:
Illegal instruction
Illegal instruction
If you like this script, please consider supporting the project:
* GitHub:
* Ko-fi: ko-fi.
* Buy Me a Coffee: buymea
root@GL-AR750S:\~# grep 'machine' /proc/cpuinfo | awk -F ': ' '{print $2}'
GL.iNet GL-AR750S (NOR/NAND)
root@GL-AR750S:\~# uname -a
Linux GL-AR750S 5.10.176 #0 Sun Apr 9 12:27:46 2023 mips GNU/Linux
root@GL-AR750S:\~#
The CPU on this router is old and there is no update that supports this CPU?
I will check this and will come back to you later.
Could you please run cat /etc/openwrt_release?
1 Like
Hello. Yes.
root@GL-AR750S:~# cat /etc/openwrt_release
DISTRIB_ID='OpenWrt'
DISTRIB_RELEASE='22.03.4'
DISTRIB_REVISION='r20123-38ccc47687'
DISTRIB_TARGET='ath79/nand'
DISTRIB_ARCH='mips_24kc'
DISTRIB_DESCRIPTION='OpenWrt 22.03.4 r20123-38ccc47687'
DISTRIB_TAINTS='busybox'
root@GL-AR750S:~#
can cofirm again the script worked flawlessly for updating my gl-a1300’s agent version from 1.82.1 to 1.94.1 while i was connected to it through ssh. Thanks heaps.
wget -q https://get.admon.me/tailscale -O update-tailscale.sh ; sh update-tailscale.sh
1 Like
Issue should be fixed, please re-run the script.
1 Like
Hello admon,
I ran the script again and it shows the same output as before.
“Illegal instruction”
And it also shows “Illegal instruction” when I try to run “tailscale up” and “tailscale status”
Thank you. This worked
Hm, it appears that the results of our research don't fit the actual system architecture. Weird.
Could you please share the output of file /bin/busybox and file /rom/usr/sbin/tailscaled?
This is the output that it shows.
root@GL-AR750S:~# file /bin/busybox
-ash: file: not found
root@GL-AR750S:~# file /rom/usr/sbin/tailscaled
-ash: file: not found
root@GL-AR750S:~#