Add link to strace videos

Add link to Unfiltered strace videosand reorganize strace links.

doc/administration/troubleshooting/linux_cheat_sheet.md

@@ -179,11 +179,13 @@ strace -tt -T -f -y -yy -s 1024 -p <pid>
 ps auwx | grep unicorn | awk '{ print " -p " $2}' | xargs strace -tt -T -f -y -yy -s 1024 -o /tmp/unicorn.txt
 ```
 
-See the [strace zine](https://wizardzines.com/zines/strace/) for a quick walkthrough.
+Be aware that strace can have major impacts to system performance when it is running.
 
-Brendan Gregg has a more detailed explanation of [how to use strace](http://www.brendangregg.com/blog/2014-05-11/strace-wow-much-syscall.html).
+#### Strace Resources
 
-Be aware that strace can have major impacts to system performance when it is running.
+- See the [strace zine](https://wizardzines.com/zines/strace/) for a quick walkthrough.
+- Brendan Gregg has a more detailed explanation of [how to use strace](http://www.brendangregg.com/blog/2014-05-11/strace-wow-much-syscall.html).
+- We have a [series of GitLab Unfiltered videos](https://www.youtube.com/playlist?list=PL05JrBw4t0KoC7cIkoAFcRhr4gsVesekg) on using strace to understand GitLab.
 
 ### The Strace Parser tool