--- title: "LXC Logfile" slug: "application-logfile-generation" updated: 2025-08-13T05:03:15Z published: 2025-08-13T05:03:15Z canonical: "docs.fmad.io/application-logfile-generation" --- > ## Documentation Index > Fetch the complete documentation index at: https://docs.fmad.io/llms.txt > Use this file to discover all available pages before exploring further. # LXC Logfile FMADIO Applications may require troubleshooting from time to time. The process to generate such logs is standardized across all LXC Application devices. The following demonstrates how to generate a logfile from the CLI. --- ### Step 1) change to LXC directory on the host Change directory to the LXC on the host. In this example we are using the LXC named ```plaintext telecom-20250425-1317 ``` Change the above name to the correct LXC All LXCs are require root privileges, change to superuser ```plaintext sudo su ``` Then change to the directory ```plaintext cd /opt/fmadio/lxc/telecom-20250425-1317 ``` Example output below ```plaintext fmadio@fmadio100v2-228U:~$ sudo su root@fmadio100v2-228U:/home/fmadio# cd /opt/fmadio/lxc/telecom-20250425-1317 root@fmadio100v2-228U:/opt/fmadio/lxc/telecom-20250425-1317# ``` --- ### Step 2) Confirm the LXC is running The logfile generation requires the LXC to be running, to confirm use the following command (replacing with the correct LXC name) ```plaintext lxc-ls -f | grep telecom-20250425-1317 ``` Example output shows its in RUNNING state, which is correct. ```plaintext root@fmadio100v2-228U:/opt/fmadio/lxc/telecom-20250425-1317# lxc-ls -f | grep telecom-20250425-1317 telecom-20250425-1317                RUNNING 0         -      192.168.255.210 - root@fmadio100v2-228U:/opt/fmadio/lxc/telecom-20250425-1317# ``` --- ### Step 3) generate the logfile Each LXC has a filename ```plaintext fmadiocli-log.lua ``` This is a per LXC specific file that extracts and generates log information about the host and the LXC. Once run it will generate a tarball used for uploading to FMADIO support Command to run shown below. It can take 1 - 5 minutes to fully run depending on the amount logs generated ```plaintext ./fmadiocli-log.lua ``` Example output shown below ```plaintext root@fmadio100v2-228U:/opt/fmadio/lxc/telecom-20250425-1317# ./fmadiocli-log.lua fmad fmadlua Aug  6 2025 (/opt/fmadio/bin/fmadiolua --nocal ./fmadiocli-log.lua ) Disable cycle calibration nil LXCName [telecom-20250425-1317] log_20250813_0432 mkdir ./log_20250813_0432 echo "----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------" >> log_20250813_0432/log echo "telecom-20250425-1317"  > log_20250813_0432/log date  >> log_20250813_0432/log mkdir ./log_20250813_0432/host/ echo "-----------------------------------------------------------------------------------------------------host report-----------------------------------------------------------------------------------------------------" >> log_20250813_0432/log /opt/fmadio/bin/system_dump.lua >> log_20250813_0432/host/system_dump fmad fmadlua Aug  6 2025 (/usr/local/bin/fmadiolua /opt/fmadio/bin/system_dump.lua ) . . . . . . echo "-----------------------------------------------------------------------------------------------------filelist-----------------------------------------------------------------------------------------------------" >> log_20250813_0449/log ls -alR . >> log_20250813_0449/log echo "-----------------------------------------------------------------------------------------------------process list-----------------------------------------------------------------------------------------------------" >> log_20250813_0449/log lxc-attach -n telecom-20250425-1317 -- /usr/bin/ps aux >> log_20250813_0449/log cp -R /mnt/store0/log/lxc/telecom-20250425-1317 ./log_20250813_0449/ cp: can't stat '/mnt/store0/log/lxc/telecom-20250425-1317': No such file or directory tar cfzv log_20250813_0449.tar.gz ./log_20250813_0449/ ./log_20250813_0449/ ./log_20250813_0449/host/ ./log_20250813_0449/host/messages_20250714.gz ./log_20250813_0449/host/messages_20250806.gz ./log_20250813_0449/host/messages ./log_20250813_0449/host/messages_20250808.gz ./log_20250813_0449/host/messages_20250717.gz ./log_20250813_0449/host/messages_20250716.gz ./log_20250813_0449/host/messages_20250801.gz ./log_20250813_0449/host/messages_20250729.gz ./log_20250813_0449/host/messages_20250718.gz ./log_20250813_0449/host/messages_20250804.gz ./log_20250813_0449/host/messages_20250727.gz ./log_20250813_0449/host/messages_20250725.gz ./log_20250813_0449/host/messages_20250728.gz ./log_20250813_0449/host/messages_20250721.gz ./log_20250813_0449/host/messages_20250810.gz ./log_20250813_0449/host/messages_20250719.gz ./log_20250813_0449/host/system_dump ./log_20250813_0449/host/messages_20250726.gz ./log_20250813_0449/host/messages_20250803.gz ./log_20250813_0449/host/messages_20250715.gz ./log_20250813_0449/host/messages_20250720.gz ./log_20250813_0449/host/messages_20250812.gz ./log_20250813_0449/host/messages_20250723.gz ./log_20250813_0449/host/messages_20250807.gz ./log_20250813_0449/host/messages_20250802.gz ./log_20250813_0449/host/messages_20250811.gz ./log_20250813_0449/host/messages_20250731.gz ./log_20250813_0449/host/messages_20250809.gz ./log_20250813_0449/host/messages_20250722.gz ./log_20250813_0449/host/messages_20250724.gz ./log_20250813_0449/host/messages_20250730.gz ./log_20250813_0449/host/messages_20250805.gz ./log_20250813_0449/log ---------------------------------------------------------------- please upload:  /mnt/store0/lxc/lib/lxc/telecom-20250425-1317/log_20250813_0454.tar.gz to           : ---------------------------------------------------------------- echo "-----------------------------------------------------------------------------------------------------DONE-----------------------------------------------------------------------------------------------------" >> log_20250813_0449/log done 96.906717Sec 1.615112Min root@fmadio100v2-228U:/opt/fmadio/lxc/telecom-20250425-1317# ``` --- ### Step 4) Upload the tarball The tarball generated is located per below ![](https://cdn.document360.io/b9aab0c4-36d0-4616-9673-30b661455571/Images/Documentation/image(354).png?sv=2026-02-06&spr=https&st=2026-11-13T18%3A18%3A19Z&se=2026-11-13T19%3A18%3A19Z&sr=c&sp=r&sig=trVv5EjbGx%2BhXqqwXx4CogM3uBlwzUvhoc9AV49Ze98%3D) In the above example it located at ```plaintext /mnt/store0/lxc/lib/lxc/telecom-20250425-1317/log_20250813_0454.tar.gz ``` Please upload this file to the FMADIO support site, our support team automatically gets notified of the upload once its done --- ### Step 5) Finished Done