Unix general tips

% ls                         // list files - compact, horizontal
% ls -l                      // list files - detail list
% ls -la                     // list all files, incl hidden, symlinks
% ls -la -t                  // sort list by last file update, descending
% ls -la -t | pbcopy         // sort list & copy to Clipboard

% ls -l . | wc -l            // Count files in a folder (wc lowercase L)
% cat <filename> | wc -l     // Count lines in a file (wc lowercase L)

% cp <source> <target>       // Copy file
% cp -R <source>/ <target>/  // Copy files, recursively
% mv <source> <target>       // Move file (rename)
% rm <filename>              // Remove file (delete)
% rmdir <folder>             // Remove empty directory
% rm -rf                     // Remove non-empty directory & children (Careful!)
% df                         // Disk free (available storage space)
% du -ah d                   // Disk used - show all files
% du -hc                     // Disk used - Folder summary

// Create a tarball (create, view files as added, compress, next value is tarball filename)
% tar -cvzf <tar_filename> <filespec>

// Take ownership of a file
% chown -R (whoami) <filename>