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Clear specific part of the screen

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# 1  
Old 05-04-2013
Clear specific part of the screen

I want to clear specific part of the screen. Say for example , i am running a bash script

for i in {1..100}
echo "Current Record = $i"

if i use a clear command over there , it will clear my screen however when i scroll up i would have the old records , is there anyway in unix to just clear a single line everytime
# 2  
Old 05-04-2013
Not sure what you want to achieve; if you want to output to a single line only, try adding a <carriage return> character:
$ for i in {1..10}; do echo -en "\rCurrent Record = $i"; sleep 1; done

This User Gave Thanks to RudiC For This Post:
# 3  
Old 05-04-2013
You could use this function where 'char="lots of spaces as required"', and, vert and horiz are the rows and columns of the terminal window where you want to over _write_...

# 4  
Old 05-04-2013
Originally Posted by chidori
s there anyway in unix to just clear a single line everytime
You can overwrite the same line every time by printing a carriage return instead of a newline, the cursor will return to the beginning of the line but not travel down to the next line.

Note this does not clear the line per se, you would need to print blank spaces or use an escape sequence.

printf "Wait for it\r"
sleep 5
printf "Ding!          \r"

Things like setting up a scrolling region inside your terminal will also prevent scrollback but are not compatible with all terminals.
This User Gave Thanks to Corona688 For This Post:
# 5  
Old 05-04-2013

See also man tput ... cheers, drl
# 6  
Old 05-05-2013
Thanks for your input guys.. This is what i was looking out for Smilie

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