helpful_ubuntu_commands
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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| helpful_ubuntu_commands [2025/05/30 13:30] – mike | helpful_ubuntu_commands [2025/08/20 09:50] (current) – mike | ||
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| === List processes and the ports they are listening on === | === List processes and the ports they are listening on === | ||
| netstat -tulpn | grep LISTEN | netstat -tulpn | grep LISTEN | ||
| + | or | ||
| + | ss -tulpn | grep LISTEN | ||
| | | ||
| === Reload systemd manager configuration after changes made === | === Reload systemd manager configuration after changes made === | ||
| Line 22: | Line 24: | ||
| === Changing default editor for visudo === | === Changing default editor for visudo === | ||
| sudo update-alternatives --config editor | sudo update-alternatives --config editor | ||
| + | |||
| + | If visudo complains about a missing defaults.vim file, it can be fixed thusly: | ||
| + | sudo touch ~root/.exrc | ||
| | | ||
| === Disable GUI screen lock === | === Disable GUI screen lock === | ||
| Line 41: | Line 46: | ||
| 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) | ||
| + | === Find the oldest file in a directory (and it's subdirectories) === | ||
| + | find . -type f -printf '%T+ %p\n' | sort | head -n 1 | ||
| + | | ||
| === Disable colors in the vi editor by default === | === Disable colors in the vi editor by default === | ||
| Create (or edit, if it exists) ~/.vimrc; into this file add the command syntax off, and save the file. | Create (or edit, if it exists) ~/.vimrc; into this file add the command syntax off, and save the file. | ||
| Line 94: | Line 102: | ||
| Then proceed to format the new drive, i.e. **mkfs -t ext4 /dev/sdb1** | Then proceed to format the new drive, i.e. **mkfs -t ext4 /dev/sdb1** | ||
| - | === Changing the server' | + | ==== Changing the server' |
| sudo vi / | sudo vi / | ||
| find the existing IP and change it to the desired IP; ' | find the existing IP and change it to the desired IP; ' | ||
| sudo netplan apply | sudo netplan apply | ||
| | | ||
| - | === Changing the server' | + | ==== Changing the server' |
| hostnamectl set-hostname [new host name] | hostnamectl set-hostname [new host name] | ||
| | | ||
helpful_ubuntu_commands.1748637056.txt.gz · Last modified: by mike