Add more common commands to the help file

help/commands.md

@@ -2,8 +2,60 @@
 
 - Move files: `mv <source> <dest>`
 - Move directories: `mv -r <source> <dest>`
+- Copy files: `cp <source> <dest>`
+- Copy directories: `cp -r <source> <dest>`
+- Copy all files from one directory to an existing directory (includes dotfiles and subdirectories): `cp -R dir_1/. dir_2/`
 
-## Inox
+Note that "renaming" files is the same as moving them from one location to another. For example, if you want to rename a file `oldfile` to `newfile`, then you would type `mv oldfile newfile`.
+
+- Print the contents of a file: `cat <filename>`
+- Batch rename multiple files: `rename -v <find_this_string> <replace_with_this_string> <in_these_files>`
+- Remove (delete) files: `rm <filename>`
+- Remove (delete) a directory: `rm -r <dirname>`
+- Make a new file: `touch <filename>`
+- Make a new directory: `mkdir <dirname>`
+- List all the files in a directory: `ls`
+- List all the directories in a directory: `ls -d */`
+- List all the files in a directory, including dotfiles: `ls -A`
+- List all the files in dirname: `ls <dirname>`
+- Only list png and jpg files: `ls *.{png,jpg}`
+
+## Switching Directories
+
+- Go up one directory `..`
+- Go up two directories `...`
+- Go to the home directory `~` OR simply `cd` with no parameters
+- Go to dirname `dirname`
+
+Note that for all of the above, `cd` is not required.
+
+### Other Commands
+
+- Print the working directory: `pwd`
+- Make a script executable: `chmod +x <file>`
+- Termite the processes with a specific word in it: `killall -q <word>`
+
+### System Commands
+
+- Logout of the current user session: `logout`
+- Restart the system: `reboot`
+- Turn off the computer: `poweroff`
+
+## Installed Commands
+
+These programs are installed on top of the base system.
+
+- List the entire contents of a directory: `tree`
+- List all the directories in a directory, up to 2 levels deep: `tree -d -L 2`
+- Beautify any JSON output: `<json_output> | jq '.'`
+
+### Inox
+
+- Open a webpage in a borderless window: `inox --app=<url>`
+- Open a webpage in the regular browser window: `inox <url>`
+
+### Dealing with Archives
+
+- Zip all files in a directotry: `zip -r <zip_name> <directory>`
+- Extract any type of archiving algorithm: `extract <filename>`
 
-- Open <url> in a new borderless window `inox --app=<url>`
-- Open <url> in the current browser session `inox <url>`