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Common issues
Shared drive is not mounted even though it's setup in fstab Usually it's coupled with this error message when starting or shutting down the system: Dependency failed for Remote File Systems The issue is that when the system tries to mount the shared drive, ...
Commands
Extend partition size If the partition size was changed in Proxmox, then after the resize on the UI, restart the VM Get PV (Physical Volume) name (Ex: /dev/sda1) sudo pvs Resize the PV sudo pvresize /dev/sda1 Get root logical volume name (Filesys...
Setting up email sending
create a backup of your postfix config: cp /etc/postfix/main.cf /etc/postfix/main_bak.cf open /etc/postfix/main.cf add the following rows (make sure none of the rows are duplicated) #mydestination = $myhostname, server.local, localhost.local, , localhost ...
Setting it up on ubuntu with Namecheap
This guide assumes that you have an account on Namecheap already with a domain and dynamic DNS enabled. Install ddclient: sudo apt install ddclient No need to fill out properly the forms while setting it up, we will change the configuration files anyway I...
Common commands/issues
Upgrade major version Make sure you are on the latest version within the current major version: snap refresh rocketchat-server Then switch to the next major "track" snap refresh rocketchat-server --channel=4.x/stable Source: htt...
Updating
It's assumed that Bookstack was installed by the Ubuntu script. Very important, as always backup your Bookstack instance by default Bookstack is installed under /var/www/bookstack, if that wasn't changed, then go there try to pull the latest changes: git ...
Setup Access Control Lists (ACL)
ACL can be used to provide additional permissions to the file system. If not installed run the following command: sudo apt install acl There are two commands: setfacl to set acl and getfacl to get acl permissions To get acl of a folder: getfacl ~/test it ...
Securing SSH with public keys
Securing keys with YubiKey Make sure you use on both your client and server at least version 8.2 of OpenSSH, because previous versions do not support 2FA with hardware security keys: ssh -V Check if OpenSSH can generate U2F keys: ssh-keygen --help and you...