Various Linux CLI (Command Line Interface) Commands with examples and grouped by type
Estimate file space usage
du -hd1 /file_path lists and summaries directories sizes under /file_path 1 directory deep, where:-d set the reporting depth flag-h set human readable formatdu -s /tmp /var lists the summary of directories /var and /tmp only, where:-s set summaries
ncdu is a 'smart' version of nu. It needs to be specifically installed, e.g. sudo apt install ncdu.
df - report file system space usage
df -h prints file system and spage usage in human readable format
duf - disk usage / Free utility, an updated version of df utility. It needs to be specifically installed, e.g. sudo apt install duf.
dufCommand to list hardware configuration parameters.
sudo lshw -short list hardware in short form.sudo lshw -c cpu lists the cpu hardware, the following device types can be listed