Week 1

Useful UNIX commands:

• pwd = print working directory (where am I now?)
• ls = list (what's in this directory?)
  • ls -lah = list all files in human-readable form
• cd (destination) = change directory to an absolute or relative destination
  • cd ~ = go to user's home directory
  • cd .. = move up one directory
  • ./ = 'here'
• cp (file to be copied) (destination) = copy file to a destination
  • cp -r (directory to be copied) (destination) = copy directory to a destination
• mkdir (name of new directory) = make a new directory inside your current directory
• mv (file to be moved) (destination) = move file to new destination
  • mv -r (directory to be moved) (destination) = move directory to a destination
  • Renaming a file or directory: mv the file or directory to its current destination
• rm (file to be removed) = delete a file
  • rm -r (directory to be removed) = delete a directory
  • THIS IS FOREVER, BE SURE YOU WANT TO rm WHATEVER YOU ARE rm-ING!!
• nano (filename) - opens nano text editor on the file specified. If file doesn't exist, nano will create it
  • Use shortcut commands listed at bottom of nano screen to save file or exit
• * = wildcard, represents any number of any characters
  • *.txt = any file ending with .txt
  • abc* = any file that starts with abc
  • *7* = any file that has a seven somewhere in the middle
• ? = represents any one character
  • file?.txt = any file that starts with "file", has one character of any type, and ends with ".txt"
• wc = word count
  • wc -l = count number of lines
  • check out wc -h for all available options
• grep = search a file for a patter
  • grep is very detailed, check out grep -h for usage
• | = pipe, take the output of the last operation and use it as the input for the next operation
  • grep "lily" flowers.txt | wc -l = searches for occurrences of "lily" in the flowers.txt file and returns the number of lines