Screensaver

alias screensaver='for ((;;)); do echo -ne "\033[$((1+RANDOM%LINES));$((1+RANDOM%COLUMNS))H\033[$((RANDOM%2));3$((RANDOM%8))m$((RANDOM%10))"; sleep 0.1 ; done'
Console screensaver.

9
By: lkj
2011-03-24 16:58:14

What Others Think

Maybe anyone could make it "remember" the consoles contents? Should try to open a new shell or somewhat like this?
nkoehring · 393 weeks and 1 day ago
This leaves the terminal in the color of the last emitted character after you do ^C
TheGuyOfDoom · 393 weeks ago
@nkoehring: I do not understand. Maybe you need just run `reset`? @TheGuyOfDoom: Just type `reset` afret ^C.
lkj · 392 weeks and 6 days ago
@nkoehring: Now I get it. It can be done with `screendump` but needs root permission to run it and I am not sure how to run it on ptsX - it is easy on ttyX. Tou can use sth like: TEMP_FILE=`tempfile` ; sudo screendump > $TEMPFILE ; screensaver ; # after ^C cat $TEMP_FILE ; rm $TEMPFILE #----- It can be done in script with `trap`. You can make function: function restore_screen() { cat $TEMP_FILE rm $TEMP_FILE } and trap SIGINT liki this: trap restore_screen SIGINT If you will do that in script it will restore your tty after ^C.
lkj · 392 weeks and 6 days ago
If you run screen, you could put that into an idle command, and also make it run it in a new screen so that it doesn't mess up your old terminal. E.g. idle 300 eval "screen screensaver" "idle 0" My .screenrc has this: idle 300 eval "screen ncmatrix -f -o -u 10" "idle 0"
unhammer · 391 weeks ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

You must be signed in to comment.

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands



Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for: