Category: General System Stuff
Linux Screen
The short version that you need, the rest is nice to know but this is your bread and butter. screen (starts a new session) this is once off until you destroy it or server/system restart. CTRL+A (then release both) then press D will put the session into the back. screen -r (will reconnect you to […]
The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY
Ubuntu The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY B53DC80D13EDEF05 GPG error: http://packages.cloud.google.com/apt google-cloud-monitoring-focal-all InRelease: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY B53DC80D13EDEF05 i.e. for this specific key “B53DC80D13EDEF05” being reported Run the following command Executing: /tmp/apt-key-gpghome.5ZVvtULX98/gpg.1.sh –keyserver hkp://keyserver.ubuntu.com:80 –recv-keys B53DC80D13EDEF05gpg: key […]
Monit Checksum failed
Re-calculate a checksum for monit After an update you will probably receive the monit checksum failed notification. Most likely Apache if you have added the additional repo for latest updates. check file apache_bin with path /usr/sbin/apache2 if failed checksum then unmonitor It is a quick fix and the error is correct. The documentation isn’t very clear […]
database /etc/aliases.db is older than source file /etc/aliases
cd /etc sudo newaliases
Ubuntu login loop
Logging into Ubuntu only to have it go straight back to the login page. If you have been hit by this you know how painful and frustrating it is. Some have even gone to the extreme of reinstalling their OS. Simply put the first step is to CTRL-SHIFT F3 login to the terminal and add […]
Grub not showing after boot
Grub not showing and the machine simply booting directly into Linux. sudo vi /etc/default/grub See the line #GRUB_HIDDEN_TIMEOUT=0 Unhash it. i.e. GRUB_HIDDEN_TIMEOUT=0 Save and then run sudo update-grub you are done.
