### Author:  [@tweiner](https://discourse.pi-hole.net/u/tweiner)
#### Post date: [September 2, 2022, 10:27pm UTC](https://discourse.pi-hole.net/t/lib-x86-64-linux-gnu-libc-so-6-version-glibc-2-28-not-found/57506/1 "2022-09-02T22:27:34Z")
I am running PI-hole in a VM under Truenas 13 - just upgraded from 12 to 13
proceeded to update pihole by logging in. Here is the messages for the execution of the upgrade.
```auto
tony@pihole01:~$ pihole -up
[✓] Update local cache of available packages
[i] Existing PHP installation detected : PHP version 7.2.24-0ubuntu0.18.04.12
[✓] Checking for git
[✓] Checking for iproute2
[✓] Checking for dialog
[✓] Checking for ca-certificates
[i] Checking for updates...
[i] Pi-hole Core: up to date
[i] Web Interface: up to date
/usr/bin/pihole-FTL: /lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.28' not found (required by /usr/bin/pihole-FTL)
[i] FTL: update available
[i] FTL out of date, it will be updated by the installer.
[✓] Root user check
```
---
### Author:  [@jfb](https://discourse.pi-hole.net/u/jfb)
#### Post date: [September 2, 2022, 10:31pm UTC](https://discourse.pi-hole.net/t/lib-x86-64-linux-gnu-libc-so-6-version-glibc-2-28-not-found/57506/2 "2022-09-02T22:31:33Z")
Please upload a debug log and post **just the token URL** that is generated after the log is uploaded by running the following command from the Pi-hole host terminal:
```auto
pihole -d
```
or do it through the Web interface:
_ **Tools \> Generate Debug Log** _
---
### Author:  [@gboone](https://discourse.pi-hole.net/u/gboone)
#### Post date: [September 3, 2022, 4:10am UTC](https://discourse.pi-hole.net/t/lib-x86-64-linux-gnu-libc-so-6-version-glibc-2-28-not-found/57506/3 "2022-09-03T04:10:30Z")
I am also getting this error about `/usr/bin/pihole-FTL: /lib/x86_64-linux-gnu/libc.so.6: version GLIBC_2.28 not found (required by /usr/bin/pihole-FTL)` after updating on Ubuntu 18.04. It causes the `pihole-FTL` service to fail and no DNS resolution.
```auto
~$ ldd --version
ldd (Ubuntu GLIBC 2.27-3ubuntu1.6) 2.27
```
I updated the VM first with recent OS updates.
Debug for the pi-hole setup BEFORE update with error: [https://tricorder.pi-hole.net/rlhTBXjR/](https://tricorder.pi-hole.net/rlhTBXjR/)
Thanks for having a look. I can provide more info later tomorrow if needed.
---
### Author:  [@Carlo\_D](https://discourse.pi-hole.net/u/Carlo_D)
#### Post date: [September 3, 2022, 8:53am UTC](https://discourse.pi-hole.net/t/lib-x86-64-linux-gnu-libc-so-6-version-glibc-2-28-not-found/57506/6 "2022-09-03T08:53:16Z")
I have the same problem **pihole-FTL[7186]: /usr/bin/pihole-FTL: /lib/x86\_64-linux-gnu/libc.so.6: version `GLIBC\_2.28' not found (required by /usr/bin/pihole-FTL)**
after upgrade pihole.
i updated the vm before updating pihole
Debug pihole here: [https://tricorder.pi-hole.net/sN9EuPnr/](https://tricorder.pi-hole.net/sN9EuPnr/)
Thx
---
### Author:  [@yubiuser](https://discourse.pi-hole.net/u/yubiuser)
#### Post date: [September 3, 2022, 9:26am UTC](https://discourse.pi-hole.net/t/lib-x86-64-linux-gnu-libc-so-6-version-glibc-2-28-not-found/57506/8 "2022-09-03T09:26:35Z")
>
>
> \### Versions
>
> \- Pi-hole: 5.12
> \- AdminLTE: 5.14.1
> \- FTL: 5.17
>
> \### Platf…orm
>
> \- OS and version: Ubuntu 18.04.6 LTS (GNU/Linux 4.15.0-122-generic x86\_64)
>
> \- Platform: Intel NUC
>
> \### Expected behavior
>
> FTL loads.
>
> \### Actual behavior / bug
>
> FTL crashes on load:
>
> pihole-FTL: /lib/x86\_64-linux-gnu/libc.so.6: version \`GLIBC\_2.28' not found (required by pihole-FTL)
>
> \### Steps to reproduce
>
> Steps to reproduce the behavior:
>
> 1. Attempt to start: \`sudo service pihole-FTL start\`
> 2. Check \`systemctl status pihole-FTL.service\`:
>
> \`\`\`● pihole-FTL.service - LSB: pihole-FTL daemon
> Loaded: loaded (/etc/init.d/pihole-FTL; generated)
> Active: failed (Result: exit-code) since Sat 2022-09-03 08:42:31 UTC; 19s ago
> Docs: man:systemd-sysv-generator(8)
> Process: 3601 ExecStart=/etc/init.d/pihole-FTL start (code=exited, status=1/FAILURE)
>
> Sep 03 08:42:31 nuc systemd\[1\]: Starting LSB: pihole-FTL daemon...
> Sep 03 08:42:31 nuc pihole-FTL\[3601\]: Not running
> Sep 03 08:42:31 nuc su\[3637\]: Successful su for pihole by root
> Sep 03 08:42:31 nuc su\[3637\]: + ??? root:pihole
> Sep 03 08:42:31 nuc su\[3637\]: pam\_unix(su:session): session opened for user pihole by (uid=0)
> Sep 03 08:42:31 nuc pihole-FTL\[3601\]: /usr/bin/pihole-FTL: /lib/x86\_64-linux-gnu/libc.so.6: version \`GLIBC\_2.28' not found (r
> Sep 03 08:42:31 nuc su\[3637\]: pam\_unix(su:session): session closed for user pihole
> Sep 03 08:42:31 nuc systemd\[1\]: pihole-FTL.service: Control process exited, code=exited status=1
> Sep 03 08:42:31 nuc systemd\[1\]: pihole-FTL.service: Failed with result 'exit-code'.
> Sep 03 08:42:31 nuc systemd\[1\]: Failed to start LSB: pihole-FTL daemon.
> \`\`\`
>
> \## Debug Token
>
> \- URL: https://tricorder.pi-hole.net/75lSJdql/
>
>
>
> \### Additional context
>
> It looks like the update to glibc 2.28 breaks compatibility with Ubuntu 18.04 LTS (EOL 2028).
>
> \`ldd --version\`:
>
> \`\`\`
> ldd (Ubuntu GLIBC 2.27-3ubuntu1.6) 2.27
> Copyright (C) 2018 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions. There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> Written by Roland McGrath and Ulrich Drepper.
> \`\`\`
>
> I have read that I need to do a full upgrade to fix this, but this may cause breaking changes with other services on this server.
---
### Author:  [@DL6ER](https://discourse.pi-hole.net/u/DL6ER)
#### Post date: [September 3, 2022, 10:32am UTC](https://discourse.pi-hole.net/t/lib-x86-64-linux-gnu-libc-so-6-version-glibc-2-28-not-found/57506/10 "2022-09-03T10:32:38Z")
Please run
```auto
pihole checkout ftl v5.16.3
```
to get back to a working version ~~until we have found a permanent solution to this.~~ ( **edit** : see below)
When you see an error like
> [@Viald](#):
>
> ```auto
> pihole-FTL: /lib/aarch64-linux-gnu/libc.so.6: version `GLIBC_2.28' not found (required by pihole-FTL)
>
> ```
please
> [@yubiuser](#):
>
> modify line 171 of `/opt/pihole/piholeCheckOut.sh` to read `oldbranch="$(pihole-FTL -b || echo master)`
>
> and run the `checkout` command again.
* * *
**edit** We decided that supporting very old operating system releases (where there is _at least_ one stable newer version) can be too much at times. You can run your Pi-hole completely fine pinned to this version until you decide to upgrade the underlying system. At some point you will have to, anyway. I'm sorry to say this but we're a small team and all are volunteers (as in: other jobs pay our daily bread) and it seems better to make such a decision rather than trying to fit in everywhere and possibly not doing it right.
---
### Author:  [@Viald](https://discourse.pi-hole.net/u/Viald)
#### Post date: [September 3, 2022, 11:05am UTC](https://discourse.pi-hole.net/t/lib-x86-64-linux-gnu-libc-so-6-version-glibc-2-28-not-found/57506/17 "2022-09-03T11:05:10Z")
Not possible due to the same issue.
root@server:~# pihole checkout ftl v5.16.3
Please note that changing branches severely alters your Pi-hole subsystems
Features that work on the master branch, may not on a development branch
This feature is NOT supported unless a Pi-hole developer explicitly asks!
Have you read and understood this? [y/N] Y
pihole-FTL: /lib/aarch64-linux-gnu/libc.so.6: version `GLIBC\_2.28' not found (required by pihole-FTL)
---
### Author:  [@yubiuser](https://discourse.pi-hole.net/u/yubiuser)
#### Post date: [September 3, 2022, 11:18am UTC](https://discourse.pi-hole.net/t/lib-x86-64-linux-gnu-libc-so-6-version-glibc-2-28-not-found/57506/18 "2022-09-03T11:18:35Z")
Please modify line 171 of `/opt/pihole/piholeCheckOut.sh` to read `oldbranch="$(pihole-FTL -b || echo master)`
and run the `checkout` command again.
---
### Author:  [@Viald](https://discourse.pi-hole.net/u/Viald)
#### Post date: [September 3, 2022, 11:19am UTC](https://discourse.pi-hole.net/t/lib-x86-64-linux-gnu-libc-so-6-version-glibc-2-28-not-found/57506/19 "2022-09-03T11:19:51Z")
Done.It works.
Thank you.
---
### Author:  [@tweiner](https://discourse.pi-hole.net/u/tweiner)
#### Post date: [September 3, 2022, 4:21pm UTC](https://discourse.pi-hole.net/t/lib-x86-64-linux-gnu-libc-so-6-version-glibc-2-28-not-found/57506/21 "2022-09-03T16:21:29Z")
I have an interesting problem. This instance of Pi-hole is running as a VM on a Truenas server. Probably because I am a noob. I can not edit the file because I can not figure out the su pw.
I am also running a backup on a Pi but am not updating that until we know what is happening.
Thank you all for your help.
YFNN (your friendly neighborhood noob)
---
### Author:  [@Carlo\_D](https://discourse.pi-hole.net/u/Carlo_D)
#### Post date: [September 3, 2022, 4:36pm UTC](https://discourse.pi-hole.net/t/lib-x86-64-linux-gnu-libc-so-6-version-glibc-2-28-not-found/57506/22 "2022-09-03T16:36:11Z")
Thanks for the solution, for the moment I have restored the VM from the backup until the final solution
---
### Author:  [@voytek](https://discourse.pi-hole.net/u/voytek)
#### Post date: [September 5, 2022, 1:49am UTC](https://discourse.pi-hole.net/t/lib-x86-64-linux-gnu-libc-so-6-version-glibc-2-28-not-found/57506/25 "2022-09-05T01:49:18Z")
thanks, I've got 'same' problem on Centos Linux 3.10.0-1160.76.1.el7.centos.plus.x86\_64 #1 SMP Tue Aug 16 14:59:44 UTC 2022 x86\_64 x86\_64 x86\_64 GNU/Linux
running above fixed it, thank you
```auto
# pihole checkout ftl v5.16.3
Please note that changing branches severely alters your Pi-hole subsystems
Features that work on the master branch, may not on a development branch
This feature is NOT supported unless a Pi-hole developer explicitly asks!
Have you read and understood this? [y/N] y
pihole-FTL: /lib64/libc.so.6: version `GLIBC_2.28' not found (required by pihole-FTL)
[✓] Branch v5.16.3 exists
[i] Switching to branch: "v5.16.3" from "master"
[✓] Downloading and Installing FTL
[✓] Restarting pihole-FTL service...
[✓] Enabling pihole-FTL service to start on reboot...
```
now I have it running as follows:
- **Pi-hole** [v5.12](https://github.com/pi-hole/pi-hole/releases/v5.12)
- **FTL**
- **Web Interface** [v5.14.2](https://github.com/pi-hole/AdminLTE/releases/v5.14.2)
if you need any debug log or anything, pls let me know, thanks
---
### Author:  [@slm](https://discourse.pi-hole.net/u/slm)
#### Post date: [September 5, 2022, 3:55pm UTC](https://discourse.pi-hole.net/t/lib-x86-64-linux-gnu-libc-so-6-version-glibc-2-28-not-found/57506/26 "2022-09-05T15:55:13Z")
Ran into the same issue.
OS: Linux pi-hole1 4.19.66-v7+ #1253 SMP Thu Aug 15 11:49:46 BST 2019 armv7l GNU/Linux
Your debug token is: [https://tricorder.pi-hole.net/N4FrxejD/](https://tricorder.pi-hole.net/N4FrxejD/)
I too was able to work around this issue by editing this file:
```auto
root@pi-hole1:~ # cat --number /opt/pihole/piholeCheckout.sh | head -180 | tail +170
170 path="${2}/${binary}"
171 oldbranch="$(pihole-FTL -b || echo master)"
172
173 if check_download_exists "$path"; then
174 echo " ${TICK} Branch ${2} exists"
175 echo "${2}" > /etc/pihole/ftlbranch
176 chmod 644 /etc/pihole/ftlbranch
177 echo -e " ${INFO} Switching to branch: \"${2}\" from \"${oldbranch}\""
178 FTLinstall "${binary}"
179 restart_service pihole-FTL
180 enable_service pihole-FTL
root@pi-hole1:~ #
```
Also notice the above mentions of the filename didn't match what I had on my box, my file is called `/opt/pihole/piholeCheckout.sh`.
---
### Author:  [@Lavarocker](https://discourse.pi-hole.net/u/Lavarocker)
#### Post date: [September 7, 2022, 4:54pm UTC](https://discourse.pi-hole.net/t/lib-x86-64-linux-gnu-libc-so-6-version-glibc-2-28-not-found/57506/27 "2022-09-07T16:54:13Z")
The above instructions worked, thank you.
Since we are using a custom FTL now and won't receive notifications of an fixed new version, how/when will we know it's been fixed so we can undo the temp fix?
Thanks
---
### Author:  [@DanSchaper](https://discourse.pi-hole.net/u/DanSchaper)
#### Post date: [September 7, 2022, 5:40pm UTC](https://discourse.pi-hole.net/t/lib-x86-64-linux-gnu-libc-so-6-version-glibc-2-28-not-found/57506/28 "2022-09-07T17:40:46Z")
> [@Lavarocker](#):
>
> won't receive notifications of an fixed new version
The fix is to update your OS. There won't be a new version of `FTL` that works.
---
### Author:  [@Skye20](https://discourse.pi-hole.net/u/Skye20)
#### Post date: [September 13, 2022, 12:15am UTC](https://discourse.pi-hole.net/t/lib-x86-64-linux-gnu-libc-so-6-version-glibc-2-28-not-found/57506/30 "2022-09-13T00:15:39Z")
Once we update our OS, what is the command to get back onto the main branch again?
Thanks
---
### Author:  [@yubiuser](https://discourse.pi-hole.net/u/yubiuser)
#### Post date: [September 13, 2022, 4:34am UTC](https://discourse.pi-hole.net/t/lib-x86-64-linux-gnu-libc-so-6-version-glibc-2-28-not-found/57506/31 "2022-09-13T04:34:05Z")
`pihole checkout master`
---
### Author:  [@Carlo\_D](https://discourse.pi-hole.net/u/Carlo_D)
#### Post date: [September 13, 2022, 1:03pm UTC](https://discourse.pi-hole.net/t/lib-x86-64-linux-gnu-libc-so-6-version-glibc-2-28-not-found/57506/32 "2022-09-13T13:03:57Z")
I upgraded the OS from ubuntu 18.04 to ubuntu 20.04.5 but nothing has changed it keeps giving error
---
### Author:  [@rdwebdesign](https://discourse.pi-hole.net/u/rdwebdesign)
#### Post date: [September 24, 2022, 11:11pm UTC](https://discourse.pi-hole.net/t/lib-x86-64-linux-gnu-libc-so-6-version-glibc-2-28-not-found/57506/33 "2022-09-24T23:11:23Z")
Did you executed an in-place upgrade from 18.04 to 20.04 or you did a fresh install of ubuntu 20.04?
---
### Author:  [@Carlo\_D](https://discourse.pi-hole.net/u/Carlo_D)
#### Post date: [September 25, 2022, 7:09am UTC](https://discourse.pi-hole.net/t/lib-x86-64-linux-gnu-libc-so-6-version-glibc-2-28-not-found/57506/34 "2022-09-25T07:09:02Z")
I did a full system upgrade, but nothing has changed. I did a clean install of ubuntu 22.04 and at that point I was able to put the new version
[Next page](https://discourse.pi-hole.net/t/lib-x86-64-linux-gnu-libc-so-6-version-glibc-2-28-not-found/57506.md?page=2)