====== Linux cribsheet ======
/* ~~REDIRECT>:crib:linux~~ */
{{tag> crib linux}}
This is a [[cribsheets|personal cribsheet]] intended for my own use. If it's useful to you, great, but it doesn't cover the subject exhaustively.

===== Reboot =====
  sudo shutdown -r now
  
===== Upgrade packages =====
  sudo apt-get upgrade
  
===== Search =====

  ** grep files like '*.haystack' for 'needle'
  .. ''grep -iHn needle *.haystack''
    ** ''grep -i'' = case-insensitive
    ** ''grep -H'' = print out the name of the file before the matching line
    ** ''grep -n'' = print out the number of the matching line
  ** Find files like '*.haystack' modified in the last five days and grep them for 'needle':
  .. ''find . -name '*.haystack' -mtime -5 -exec grep -iHn needle {} \;''
    ** the dot after ''find'' is where to start, i.e. the current working directory
    ** the pattern '*.haystack' has to be quote-enclosed to stop the shell expanding the wildcard
    ** ''-mtime -5'' means 'modification time less than five days ago. For files more than five days old, use ''-mtime +5''
    ** ''-exec'' has to be semi-colon terminated to tell ''find'' where the command ends, but the semi-colon has to be escaped to stop the shell treating it as the end of ''find''
  ** Find files exeeding a certain size:
  .. ''find . -type f -size +1M''
    ** find files of size 1MB or greater
  ** Find files modified in the last day:
  .. ''find . -type f -mtime -1 | grep -v ./.git''
    ** the ''grep -v'' is because you probably aren't interested in repo transactions 

===== Fix VGA display alignment =====

From [[https://superuser.com/questions/1621531/missing-the-first-character-of-each-line-on-ubuntu-20-04-lts-server-terminal|SuperUser.com]].

  - Open ''vim''
  - Set background colour blue ('':color blue'')
  - Open monitor menu and select "Auto adjust"