Commands by angleto

Commands by angleto (7)

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increase recursively the modification time for a list of files

Increase the modification date for the files selected with the find command.
This is sample output - yours may be different.
1

find . -type f | while read line; do NEW_TS=`date -d@$((\`stat -c '%Y' $line\` + <seconds> )) '+%Y%m%d%H%M.%S'`; touch -t $NEW_TS ${line}; done

angleto · 2010-11-18 14:03:32 4
convert pdf into multiple png files

syntax for resolution is: (see "man gs" for further informations) -rnumber -rnumber1xnumber2 Show Sample Output
This is sample output - yours may be different.
```
GPL Ghostscript 8.70 (2009-07-31)
Copyright (C) 2009 Artifex Software, Inc.  All rights reserved.
This software comes with NO WARRANTY: see the file PUBLIC for details.
Processing pages 1 through 3.
Page 1
>>showpage, press <return> to continue<<

Page 2

>>showpage, press <return> to continue<<
Page 3

>>showpage, press <return> to continue<<
```
2

gs -sDEVICE=pngalpha -sOutputFile=<filename>%d.png -r<resolution> <pdffile>

angleto · 2010-03-30 09:51:10 5
remove files and directories with acces time older than a given date

remove files with access time older than a given date. If you want to remove files with a given modification time replace %A@ with %T@. Use %C@ for the modification time. The time is expressed in epoc but is easy to use any other format. Show Sample Output
This is sample output - yours may be different.
```
~/tmp$ find . -printf '%p : %A@\n' | awk '{FS=" : " ; if($2 < 1258734167 ) print $1 ;}' | xargs rm --verbose -fr ;
removed `./file_1'
removed `./file_2'
removed `./file_3'
removed `./file_4'
removed `./file_5'
removed `./file_6'
removed `./file_7'
removed `./file_8'
removed `./file_9'
```
-2

find <dir> -printf '%p : %A@\n' | awk '{FS=" : " ; if($2 < <time in epoc> ) print $1 ;}' | xargs rm --verbose -fr ;

angleto · 2009-11-20 16:31:58 10
retrieve the source address used to contact a given host

on multihomed hosts, connected to several networks, could be usefull to know the source address (local ip address) used to reach the target host, this command does not require root priviledges. The command use a TCP socket, if there is any error the command return an empty string, elsewhere return a valid ip address. Show Sample Output
This is sample output - yours may be different.
```
$ python -c 'import socket;  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM); s.connect(("www.google.com", 80)); print s.getsockname()[0] ; s.close() ;' 2> /dev/null
192.168.26.198
```
2

python -c 'import socket; s = socket.socket(socket.AF_INET, socket.SOCK_STREAM); s.connect(("<hostname>", <port>)); print s.getsockname()[0] ; s.close() ;' 2> /dev/null

angleto · 2009-10-13 16:21:15 3
backup and remove files with access time older than 5 days.

create an archive of files with access time older than 5 days, and remove original files.
This is sample output - yours may be different.
7

tar -zcvpf backup_`date +"%Y%m%d_%H%M%S"`.tar.gz `find <target> -atime +5` 2> /dev/null | xargs rm -fr ;

angleto · 2009-05-26 17:15:52 8
remove audio trac from a video file

create a copy of a video file without the audio tracs
This is sample output - yours may be different.
2

mencoder -ovc copy -nosound ./movie.mov -o ./movie_mute.mov

angleto · 2009-05-17 11:56:22 5
covert m4a audio files to wav
This is sample output - yours may be different.
0

find . -name '*.m4a' | xargs -I audiofile mplayer -ao pcm "audiofile" -ao pcm:file="audiofile.wav"

angleto · 2009-05-16 11:51:14 4

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Redirect incoming traffic to SSH, from a port of your choosing

Stuck behind a restrictive firewall at work, but really jonesing to putty home to your linux box for some colossal cave? Goodness knows I was...but the firewall at work blocked all outbound connections except for ports 80 and 443. (Those were wide open for outbound connections.) So now I putty over port 443 and have my linux box redirect it to port 22 (the SSH port) before it routes it internally. So, my specific command would be: $iptables -t nat -A PREROUTING -p tcp --dport 443 -j REDIRECT --to-ports 22 Note that I use -A to append this command to the end of the chain. You could replace that with -I to insert it at the beginning (or at a specific rulenum). My linux box is running slackware, with a kernel from circa 2001. Hopefully the mechanics of iptables haven't changed since then. The command is untested under any other distros or less outdated kernels. Of course, the command should be easy enough to adapt to whatever service on your linux box you're trying to reach by changing the numbers (and possibly changing tcp to udp, or whatever). Between putty and psftp, however, I'm good to go for hours of time-killing.

Generate MD5 of string and output only the hash checksum

Get information about a video file

Remove security limitations from PDF documents using ghostscript (for Windows)

#4345 also works under windows

Print all open regular files sorted by the number of file handles open to each.

List all open files of all processes. . $ find /proc/*/fd Look through the /proc file descriptors . $ -xtype f list only symlinks to file . $ -printf "%l\n" print the symlink target . $ grep -P '^/(?!dev|proc|sys)' ignore files from /dev /proc or /sys . $ sort | uniq -c | sort -n count the results . Many processes will create and immediately delete temporary files. These can the filtered out by adding: $ ... | grep -v " (deleted)$" | ...

Read aloud a text file in Ubuntu (and other Unixes with espeak installed

Sort movies by length, longest first

handles file names with spaces and colons, fixes sort (numeric!), uses mplayer, same output format as other alternatives

Decrypt exported android wallet keys for import into desktop client (LTC,FTC,BTC)

convert unixtime to human-readable with awk

- convert unixtime to human-readable with awk - useful to read logfiles with unix-timestamps, f.e. squid-log: sudo tail -f /var/log/squid3/access.log | awk '{ print strftime("%c ", $1) $0; }

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