From an awesome idea got from jbranchaud, a repository to collect all the today I learned about the more different topics I learned.
- Opo factory restore on 2016-04-30
 
- Reboot on system upgrade on 2016-03-10
 
- Change language version on 2016-02-26
 
- Discovery on 2016-02-23
 
- Anyenv on 2016-02-23
 
- Export patch from stash on 2016-12-23
 - Export subtree with history on 2020-02-04
 - Import history in another repo on 2020-02-04
 
- Use module fork on 2019-12-13
 - Template output as string on 2020-07-30
 - Create tar.gz file on 2020-10-24
 
- Resize svg drawing to canvas on 2016-12-06
 
- Recover a crashed node on 2020-04-23
 - Delete all pods by search on 2020-04-23
 - Restart pods in deployment on 2020-11-02
 - Delete all pods not in running state on 2021-03-05
 
- Hide user from login screen on 2018-04-06
 
- Convert pdf to image on 2021-01-13
 - Extract page from pdf on 2021-01-13
 
- Debugging on 2021-07-16
 
- Mysqldump permissions on 2016-03-15
 
- Specify connection application name on 2019-10-10
 
- Vulnerability scanner on 2016-02-26
 - Security on 2016-02-26
 - Rake tasks specs on 2016-03-17
 
- Hide ruby deprecation warnings on 2020-08-29
 
- Check website response time on 2016-02-25
 - Create huge file on 2020-08-11
 
- All mac addresses in LAN on 2016-03-08
 - Uefi external hd boot on 2016-04-20
 - Change file timestamps on 2016-04-20
 - Get debconf available selections on 2016-07-12
 - See bandwith usage per process on 2016-12-06
 - Show processes using files on 2016-12-07
 - How to download certificate from server on 2016-12-23
 - Create encrypted partition on 2017-05-18
 - View last successfull and failed login attempts on 2016-09-29
 - Disable systemd service manually on 2017-06-23
 - Show ssh key fingerprint on 2017-11-07
 - Test starttls smtp auth on 2017-12-12
 - Change ssh key passphrase on 2018-02-15
 - Change gpg expire date on 2018-03-10
 - Search gpg in keyserver on 2018-03-10
 - Send gpg key to keyserver on 2018-03-10
 - List files in deb package on 2019-10-11
 - Graceful nginx shutdown on 2020-11-20
 - Querying unix sockets with curl on 2021-02-10
 
- Modules depends on on 2020-05-20
 
- Concatenating video files on 2016-04-20
 - Converting video files on 2017-03-21
 - Cut video with ffmpeg on 2017-11-07
 - Rotate video on 2017-11-07
 
- Read from stdin on 2020-09-25
 - Send vim buffer to command on 2020-09-25
 - Editing pipes (with $editor) on 2020-09-25