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Terminal - Commands tagged clear - 4 results
alias cls='clear;ls'
2013-03-19 12:18:47
User: opexxx
Functions: alias
Tags: ls clear
0

Clear the screen and list file

for p in `ps L|cut -d' ' -f1`;do echo -e "`tput clear;read -p$p -n1 p`";ps wwo pid:6,user:8,comm:10,$p kpid -A;done
2

While going through the source code for the well known ps command, I read about some interesting things.. Namely, that there are a bunch of different fields that ps can try and enumerate for you. These are fields I was not able to find in the man pages, documentation, only in the source.

Here is a longer function that goes through each of the formats recognized by the ps on your machine, executes it, and then prompts you whether you would like to add it or not. Adding it simply adds it to an array that is then printed when you ctrl-c or at the end of the function run. This lets you save your favorite ones and then see the command to put in your .bash_profile like mine at : http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html

Note that I had to do the exec method below in order to pause with read.

t ()

{

local r l a P f=/tmp/ps c='command ps wwo pid:6,user:8,vsize:8,comm:20' IFS=' ';

trap 'exec 66

exec 66 $f && command ps L | tr -s ' ' >&$f;

while read -u66 l >&/dev/null; do

a=${l/% */};

$c,$a k -${a//%/} -A;

yn "Add $a" && P[$SECONDS]=$a;

done

}

while true; do echo -ne "$(date)\r"; sleep 1; done
2009-11-17 22:45:37
User: polaco
Functions: echo sleep
12

The above code is just an example of printing on the same line, hit Ctrl + C to stop

When using echo -ne "something\r", echo will:

- print "something"

- dont print a new line (-n)

- interpret \r as carriage return, going back to the start of the line (-e)

Remember to print some white spaces after the output if your command will print lines of different sizes, mainly if one line will be smaller than the previous

Edit from reading comments: You can achieve the same effect using printf (more standardized than echo): while true; do printf "%-80s\r" "$(date)"; sleep 1; done

cat /dev/urandom|awk 'BEGIN{"tput cuu1" | getline CursorUp; "tput clear" | getline Clear; printf Clear}{num+=1;printf CursorUp; print num}'
2009-07-13 07:30:51
User: axelabs
Functions: awk cat printf
Tags: nawk awk clear tput
0

awk can clear the screen while displaying output. This is a handy way of seeing how many lines a tail -f has hit or see how many files find has found. On solaris, you may have to use 'nawk' and your machine needs 'tput'