Commands by lpanebr

Commands by lpanebr (4)

sorted by

find potentially malicious PHP commands used in backdoors and aliked scripts

Searched strings: passthru, shell_exec, system, phpinfo, base64_decode, chmod, mkdir, fopen, fclose, readfile Since some of the strings may occur in normal text or legitimately you will need to adjust the command or the entire regex to suit your needs.
This is sample output - yours may be different.
0

find ./public_html/ -name \*.php -exec grep -HRnDskip "$passthru\|shell_exec\|system\|phpinfo\|base64_decode\|chmod\|mkdir\|fopen\|fclose\|readfile$ *(" {} \;

lpanebr · 2013-04-03 12:42:19 4
Convert multiple images to multi page PDF (with specific page order)

Creates a PDF from multiple images. One page per image. If you want a specific arbitrary order you can use {1,3,5,10,12} * you may use jpg, tif etc ** if you do use jpg images you might want to add "-compress Zip" as suggested below to prevent from having the images from being re-compressed.
This is sample output - yours may be different.
0

convert {1..12}.png MyMultiPageFile.pdf

lpanebr · 2013-03-26 01:30:38 9
List available upgrades from apt (package names only)

Usefull if you only want to see the package names, or if you want to use them in a script.
This is sample output - yours may be different.
1

apt-get -s upgrade | awk '/Inst.+/ {print $2}'

lpanebr · 2013-03-25 21:23:11 2
List total available upgrades from apt without upgrading the system

This let's you find out the total packages that have available upgrades. Usefull if you want to check or show the total available upgrades on your system. Show Sample Output
This is sample output - yours may be different.
```
65 package updates are available
```
3

apt-get -s upgrade | awk '/[0-9]+ upgraded,/ {print $1 " package updates are available"}'

lpanebr · 2012-03-29 17:04:32 2

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Stream audio over ssh

This will allow you to convert an audio file to wav format, and send it via ssh to a player on the other computer, which will open and play it there. Of course, substitute your information for the sound file and remote address You do not have to use paplay on the remote end, as it is a PulseAudio thing. If the remote end uses ALSA, you should use aplay instead. If it uses OSS, you should berate them about having a lousy sound system. Also, you're not limited to transmitting encoded as wav either, it's just that AFAIK, most systems don't come with mp3 codecs, but will play wav files fine. If you know SoX is installed on the remote end and has mp3 codecs, you can use the following instead: $ cat Klaxon.mp3 |ssh thelab@company.com play -t mp3 - this will transmit as mp3. Again, use your specific information. if you're not playing mp3s, use another type with the -t option

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

See all the commits for which searchstring appear in the git diff

Compare / diff two images

Outputs the number of different pixels. 2 params to increase tolerance: * thumbnails size * fuzz, the color distance tolerance See http://en.positon.org/post/Compare-/-diff-between-two-images for more details.

Time Synchronisation with NTP

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"

Find common groups between two users

mp3 streaming

FizzBuzz in Perl

Just another FizzBuzz in Perl.

Reboot machine when everything is hanging

If the machine is hanging and the only help would be the power button, this key-combination will help to reboot your machine (more or less) gracefully. R - gives back control of the keyboard S - issues a sync E - sends all processes but init the term singal I - sends all processes but init the kill signal U - mounts all filesystem ro to prevent a fsck at reboot B - reboots the system Save your file before trying this out, this will reboot your machine without warning! http://en.wikipedia.org/wiki/Magic_SysRq_key

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