helpful_ubuntu_commands
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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| helpful_ubuntu_commands [2026/07/07 18:04] – mike | helpful_ubuntu_commands [2026/09/02 19:57] (current) – mike | ||
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| ====== Helpful Ubuntu/ | ====== Helpful Ubuntu/ | ||
| + | ==== Miscellaneous/ | ||
| === Disable Ubuntu Pro " | === Disable Ubuntu Pro " | ||
| Line 41: | Line 42: | ||
| === Determine the date the system was installed (not 100% reliable) === | === Determine the date the system was installed (not 100% reliable) === | ||
| tune2fs -l /dev/vda2 | grep ‘Filesystem created:’ (replace vda2 with device where root filesystem is located) | tune2fs -l /dev/vda2 | grep ‘Filesystem created:’ (replace vda2 with device where root filesystem is located) | ||
| + | |||
| + | === Copy an existing partition to a new partition === | ||
| + | sudo rsync -aAXv --info=progress2 --exclude='/ | ||
| | | ||
| + | === Copy a directory and all its subdirs to another directory === | ||
| + | rsync -av / | ||
| + | |||
| === Finding largest files/ | === Finding largest files/ | ||
| du -a /dir/ | sort -n -r | head -n 20 (replace 20 with the # of lines you wish to have returned) | du -a /dir/ | sort -n -r | head -n 20 (replace 20 with the # of lines you wish to have returned) | ||
| Line 75: | Line 82: | ||
| ==== Ansible/ | ==== Ansible/ | ||
| | | ||
| - | === Generate password hashes (useful for Ansible playbooks amongst other things) === | + | === Generate password hashes (useful for Ansible playbooks, Ansible Vault, |
| mkpasswd --method=sha-512 | mkpasswd --method=sha-512 | ||
| Line 127: | Line 134: | ||
| sudo netplan apply | sudo netplan apply | ||
| | | ||
| + | Update the /etc/hosts file accordingly | ||
| + | |||
| + | === Changing the server' | ||
| + | |||
| + | 1. Disable cloud-init networking to avoid overwriting the new configuration: | ||
| + | echo " | ||
| + | |||
| + | 2. cd into / | ||
| + | |||
| + | network: | ||
| + | version: 2 | ||
| + | renderer: networkd | ||
| + | ethernets: | ||
| + | ens18: | ||
| + | dhcp4: false | ||
| + | addresses: | ||
| + | - 192.168.1.xx/ | ||
| + | nameservers: | ||
| + | addresses: | ||
| + | - 192.168.1.1 | ||
| + | routes: | ||
| + | - to: default | ||
| + | via: 192.168.1.1 | ||
| + | |||
| + | 3. Execute '' | ||
| + | |||
| === Changing the server' | === Changing the server' | ||
| hostnamectl set-hostname [new host name] | hostnamectl set-hostname [new host name] | ||
helpful_ubuntu_commands.1783472692.txt.gz · Last modified: by mike