some use­full linux commands

  1. rpm –ivh packages(s).rpm
    install rpm file(s)
  2. rpm –Uvh packages(s).rpm
    upgrade sys­tem with rpms
  3. rpm –e pack­age
    remove package
  4. rpm –q pack­age
    show ver­sion of pack­age installed
  5. rpm –q –i pack­age
    show all pack­age metadata
  6. rpm –q –f /path/file
    what pack­age does file belong
  7. find –name “*.[ch]” | xargs grep –E “search string“
    search *.c and *.h for “search string” in this dir and below
  8. find / –mtime –1  –size +150000000 –print
    finds all files cre­ated in the last day that are larger than 150GB.