Commands by svg

Commands by svg (11)

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Stamp a text line on top of the pdf pages.

To quickly add some remark, comment, stamp text, ... on top of (each of) the pages of the input pdf file.
This is sample output - yours may be different.
19

echo "This text gets stamped on the top of the pdf pages." | enscript -B -f Courier-Bold16 -o- | ps2pdf - | pdftk input.pdf stamp - output output.pdf

svg · 2012-01-03 14:58:10 12
List all broadcast addresses for the routes on your host.

Can be used in a firewall script, e.g. to avoid logging broadcast packtes. Show Sample Output
This is sample output - yours may be different.
```
10.10.1.255
```
0

for net in $(ip route show | cut -f1 -d\ | grep -v default); do ipcalc $net | grep Broadcast | cut -d\ -f 2; done

svg · 2010-09-28 13:21:31 4
connect via ssh using mac address

Instead of looking for the right ip address, just pick whatever address you like and set a static ip mapping.
This is sample output - yours may be different.
7

sudo arp -s 192.168.1.200 00:35:cf:56:b2:2g temp && ssh root@192.168.1.200

svg · 2009-09-11 07:49:28 8
uncomment the lines where the word DEBUG is found
This is sample output - yours may be different.
9

sed '/^#.*DEBUG.*/ s/^#//' $FILE

svg · 2009-07-30 09:30:17 18
put all lines in comment where de word DEBUG is found
This is sample output - yours may be different.
8

sed -i 's/^.*DEBUG.*/#&/' $file

svg · 2009-07-30 09:20:37 77
Kill a process with its name

There's already a proper command for what the former alternative tried to script
This is sample output - yours may be different.
-5

pkill $1

svg · 2009-07-20 12:47:41 4
Update twitter from command line without reveal your password

Update twitter from commandline, without revealing your password and without having to type it interactively. You 'll need to put a line "machine twitter.com login TWITTERUSER password TWITTERPASS" in $HOME/.netrc and better chmod 600 that file.
This is sample output - yours may be different.
7

curl -n -d status='Hello from cli' https://twitter.com/statuses/update.xml

svg · 2009-07-05 09:39:37 6
Quickly clean log files (assuming you don't want them anymore)

you don't need to echo, just a plain redirect is enough to empty the file
This is sample output - yours may be different.
0

for file in `find /var/log/ -type f -size +5000k`; do > $file; done

svg · 2009-07-03 17:38:21 8
Merge several pdf files into a single file
This is sample output - yours may be different.
3

pdftk $* cat output $merged.pdf

svg · 2009-06-26 07:36:02 11
swap stdout and stderr

Possible use, to filter something in stderr: (/usr/bin/$COMMAND $PARAM 3>&1 1>&2 2>&3 | grep -v $uninteresting_error ) 3>&1 1>&2 2>&3
This is sample output - yours may be different.
6

$command 3>&1 1>&2 2>&3

svg · 2009-06-09 08:48:08 12
Relocate a file or directory, but keep it accessible on the old location throug a simlink.

Used for moving stuff around on a fileserver
This is sample output - yours may be different.
18

mv $1 $2 && ln -s $2/$(basename $1) $(dirname $1)

svg · 2009-05-25 08:54:36 246

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Sort specific lines while editing within vi

Sort lines within vi editor. In this example sort lines 33-61 and lines 4-9 asciibetically.

High resolution video screen recording

$ gorecord foo.mp4 I've tried all of the screen recorders available for Linux and this is easily the best. xvidcap segfaults; VNC is too much hassle. There are alternatives of this command already here that I am just too lazy to reply to. Messing with the frames per second option, -r, 25 seems to be the best. Any lower and the video will look like a flipbook, if it records at all - -r 10 won't - any faster is the same, oddly enough. Edit: CLF doesn't like my long command to add audio, so here it is in the description. $ goaddaudio() ${ $if [ $# != 3 ]; then $ echo 'goaddaudio < audio > < src video > < dst video >' $ return $ fi $ $ f=goaddaudio$RANDOM $ ffmpeg -i "$2" &> $f $ d=$( grep Duration $f | awk '{print $2}' | tr -d ',' ) && $ rm $f && $ ffmpeg -i "$1" -i "$2" -r 25 -ab 192k -ar 44100 -sameq -t $d "$3" $}

Get a stream feed from a Twitter user

*** CAREFULLY READ THE NOTES **** *** THIS DOES NOT WORK "OUT OF THE BOX" *** You'll need a few minutes of CAREFUL reading before making your own Twitter feed: In 2010 simple command line Twitter feed requests all stopped working because Twitter upgraded to SSL security. Https requests for a filtered Twitter stream feed now require a special header called "oauth_header". The benefit is that your stream feed and login info is securely encrypted. The bad news is that an "oauth_header" takes some work to build. Fortunately, four functions, imaginatively named step1, step2, step3 and step4 can be used to build a customized oauth_header for you in a few minutes. Now, go look at "step1" to start creating your own oauth_header!

Convert a bunch of HTML files from ISO-8859-1 to UTF-8 file encoding in a folder and all sub-folders

This is my first attempt at converting all HTML files to UTF-8 file encoding, including all subfolders. Theres probably a much more compact way to do it, but I'm quite proud of it with my windows background ;)

Grab all .flv files from a webpage to the current working directory

I wanted all the 'hidden' .flv files from the http link in the command line; wget seemed appropriate, fed with output from lynx, grep the flv files and the normalised via sed (to remove the numeric bullet). Similar to the 'Grab mp3 files' fu. Replace link with your own, grep arg with something more interesting ;) See here for something along the same lines... http://www.commandlinefu.com/commands/view/1006/grab-mp3-files-from-your-favorite-netcasts-mp3blog-or-sites-that-often-have-good-mp3s Hope you find it useful! Improvements welcome, naturally.

return external ip

Recursive search and replace (with bash only)

Replaces a string matching a pattern in one or several files found recursively in a particular folder.

Echo the contents of a Url

Directly send the content of a url to standard out. This command is most convenient for sending the output of a download directly to another command.

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Remove spaces from filenames - through a whole directory tree.

An example of zsh glob qualifiers.

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Commands by svg (11)

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