LinuxQuestions.org

Network usage on a single device and log diving

Posted 09-27-2011 at 02:57 PM by sag47
Updated 09-29-2011 at 08:30 AM by sag47

I wanted to know the received network usage on a device in kB so this one liner was produced for the desired result.

Code:

while true; do y=`ifconfig eth0 | grep RX\ bytes| sed -e 's/.*bytes\://' -e 's/\ .*//'`; sleep 1; x=`ifconfig eth0 | grep RX\ bytes| sed -e 's/.*bytes\://' -e 's/\ .*//'`; echo $(((x-y)/1024)); done

Press Ctrl+C to stop analyzing the network traffic on that device.

Here's another one liner of me looking through multiple log locations.
...

sag47

Senior Member

Posted in Uncategorized

Views 1888 Comments 0 sag47 is offline

Simulate -print0 with ls

Posted 09-07-2011 at 03:39 AM by sag47

Tags find

Recently I wanted to manipulate files only in the current directory (not sub-directories). I usually use the following combination...

Code:

find . -type f -print0 | xargs -0 somecommand

The only problem I had with that was it ran through all sub-directories as well. Then I remembered the -m switch for ls and decided to depend on my good old friend sed.

Code:

ls -m | sed 's/, /\x0/g' | xargs -0 somecommand

Though I guess it would be better to do it...

sag47

Senior Member

Posted in Uncategorized

Views 4260 Comments 0 sag47 is offline

rsync commands and how I backup

Posted 06-23-2011 at 05:06 PM by sag47
Updated 06-23-2011 at 05:07 PM by sag47

Tags backup, hardware, rsync

I run the following command when I want to just update one directory to another. It only copies files that have changed. If any files have been deleted from A they still exists in directory B. The trailing slash after A/ is necessary to tell rsync to move the contents. Otherwise A will create a folder in B called /media/B/A and move the files over.

Code:

rsync -ruptv /media/A/ /media/B

I run the following command when I want to mirror one directory to another. Any files...

sag47

Senior Member

Posted in Uncategorized

Views 2237 Comments 0 sag47 is offline

Convert and resize images using imagemagick

Posted 05-30-2011 at 10:07 PM by sag47
Updated 05-31-2011 at 01:23 AM by sag47

Tags convert, imagemagick

This past memorial day weekend I took a bunch of pictures which I wanted to post to the web. Web photos are best viewed in 800x600px and I had a lot of them. So I used a simple command to do it.

Code:

for x in `ls -1`;do convert -resize 800x600 $x `echo $x | sed 's/.JPG/.png/'`;done
mkdir web_album
for x in `ls -1 *.png`;do convert $x web_album/`echo $x | sed 's/.png/.jpg/'`;done
rm *.png

Now I don't have to spend all my time in Gimp with that simple batch command.

sag47

Senior Member

Posted in Uncategorized

Views 7807 Comments 1 sag47 is offline

DVD Ripping

Posted 04-25-2011 at 10:54 AM by sag47

Tags convert, ffmpeg, mencoder

I work for a Scientific Institution and a company which recorded talks decided to give us all the talks in DVD format instead of a hard drive full of video files. This is kind of counter intuitive however luckily I use Linux at work. Long story short mencoder with lame installed solved my problems.

Code:

mencoder 
-vf harddup 
-vf-add smartblur=.6:-.5:0,unsharp=l5x5:.8:c5x5:.4 
-xvidencopts fixed_quant=4:profile=dxnhtntsc 
-lameopts cbr:br=128:aq=0:vol=1

...

sag47

Senior Member

Posted in Uncategorized

Views 6735 Comments 1 sag47 is offline

Page 6 of 8

« First