Commands by rodolfoap

Commands by rodolfoap (16)

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Steve Reich - Piano Phase; interpreter: Bourne-Again Shell.

The Piano Phase piece, by Steve Reich is a minimalist composition which is played on two pianos played at slightly different tempos, a task that's very difficult to accomplish by human players. The auditive effects produced by the cell displacement produce beautiful patterns. See https://en.wikipedia.org/wiki/Piano_Phase . My rendered version: https://ydor.org/SteveReich/piano_phase.mp3 Requires sox to be installed on the system. There are multiple videos on youtube showing different approaches and experiences to this interpretation. There is also a synthesized version. Even if Bash can behave as a powerful pianist, a simple threaded version leaves full room to several time glitches and even negative displacements, the same issues that human pianists experience when playing the piece. The older the computer, the better the chaos added to the result due to the CPU load. Apparently that's the reason Steve Reich composes pieces such as this. Without further ado, please give a warm welcome to the Bash minimalist player on synthesized two-threaded pianos. Please turn off your cellphones.
This is sample output - yours may be different.
1

phase() { while :; do for n in E4 F#4 B4 C#5 D5 F#4 E4 C#5 B4 F#4 D5 C#5; do /usr/bin/play -qn synth $1 pluck $n; done; echo -n "[$1]"; done; }; phase 0.13 & phase 0.131 &

rodolfoap · 2017-06-14 20:29:26 4

Bash scripts encryption and passphrase-protection

This function will encrypt a bash script and will only execute it after providing the passphrase. Requires mcrypt to be installed on the system. Show Sample Output

scrypt(){ [ -n "$1" ]&&{ echo '. <(echo "$(tail -n+2 $0|base64 -d|mcrypt -dq)"); exit;'>$1.scrypt;cat $1|mcrypt|base64 >>$1.scrypt;chmod +x $1.scrypt;};}

rodolfoap · 2017-06-14 16:27:20 2

Bruteforce dm-crypt using dictionary

Lost your luks passphrase? You can always bruteforce from the command line. See the sample output, a simple command using a dictionary. Show Sample Output
This is sample output - yours may be different.
```
# cat dictionary.txt|while read a; do echo $a; echo $a|cryptsetup luksOpen /dev/sda5 $a && echo KEY FOUND; done
pass
No key available with this passphrase.
PasS
No key available with this passphrase.
PASs
No key available with this passphrase.
PA5s
No key available with this passphrase.
P4s5
KEY FOUND
...

# ls -l /dev/mapper/
total 0
crw------T 1 root root 10, 236 Apr 16 19:49 control
lrwxrwxrwx 1 root root       7 Apr 16 20:34 P4s5 -> ../dm-1
```
0

cat dictionary.txt|while read a; do echo $a|cryptsetup luksOpen /dev/sda5 sda5 $a && echo KEY FOUND: $a; done

rodolfoap · 2014-04-16 18:49:53 1

Bruteforce dm-crypt using shell expansion

Lost your luks passphrase? You can always bruteforce from the command line. See the sample output, a simple command for the "pass" word, using combinations of upper/lowercase or number replacement. The generated combinations are: for a in {p,P}{a,A,4}{s,S,5}{s,S,5}; do echo $a; done pass pasS pas5 paSs paSS paS5 ... Show Sample Output

This is sample output - yours may be different.

for a in {p,P}{a,A,4}{s,S,5}{s,S,5}; do echo $a|cryptsetup luksOpen /dev/sda5 $a && echo KEY FOUND: $a; done
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
No key available with this passphrase.
KEY FOUND: P4s5
...

# ls -l /dev/mapper/
total 0
crw------T 1 root root 10, 236 Apr 16 19:49 control
lrwxrwxrwx 1 root root 7 Apr 16 20:34 P4s5 -> ../dm-1

for a in {p,P}{a,A,4}{s,S,5}{s,S,5}; do echo $a|cryptsetup luksOpen /dev/sda5 $a && echo KEY FOUND: $a; done

rodolfoap · 2014-04-16 18:41:50 0

Multiline read

Reads n lines from stdin and puts the contents in a variable. Yes, I know the read command and its options, but find this logical even for one line. Show Sample Output
This is sample output - yours may be different.
```
$ A=$(head -3)
Line1
line2
line3

$ echo "$A"
Line1
line2
line3
```
-2

VAR=$(head -5)

rodolfoap · 2014-04-05 13:45:18 0
Encrypt and password-protect execution of any bash script, Version 2

(Please see sample output for usage) Use any script name (the read command gets it) and it will be encrypted with the extension .crypt, i.e.: myscript --> myscript.crypt You can execute myscript.crypt only if you know the password. If you die, your script dies with you. If you modify the startup line, be careful with the offset calculation of the crypted block (the XX string). Not difficult to make script editable (an offset-dd piped to a gpg -d piped to a vim - piped to a gpg -c directed to script.new ), but not enough space to do it on a one liner. Sorry for the chmod on parentheses, I dont like "-" at the end. Thanks flatcap for the subshell abbreviation to /dev/null Show Sample Output
This is sample output - yours may be different.
```
$ cat script.bash

#!/bin/bash
echo "hello, world"

$ read -p 'Script: ' S && C=$S.crypt H='eval "$(dd if=$0 bs=1 skip=// 2>/dev/null|gpg -d 2>/dev/null)"; exit;' && gpg -c<$S|cat >$C <(echo $H|sed s://:$(echo "$H"|wc -c):) - <(chmod +x $C)

Script: script.bash
Enter passphrase:
Repeat passphrase:

$ cat script.bash.crypt 

eval "$(dd if=$0 bs=1 skip=70 2>/dev/null|gpg -d 2>/dev/null)"; exit;
%3@5%7%f$2&s*ty7%8@j$j!8)(&@@@

$ ./script.bash.crypt 
Enter passphrase:

hello, world
```
6

read -p 'Script: ' S && C=$S.crypt H='eval "$((dd if=$0 bs=1 skip=//|gpg -d)2>/dev/null)"; exit;' && gpg -c<$S|cat >$C <(echo $H|sed s://:$(echo "$H"|wc -c):) - <(chmod +x $C)

rodolfoap · 2013-03-10 08:59:45 8
Encrypt and password-protect execution of any bash script

(Please see sample output for usage) script.bash is your script, which will be crypted to script.secure script.bash --> script.secure You can execute script.secure only if you know the password. If you die, your script dies with you. If you modify the startup line, be careful with the offset calculation of the crypted block (the XX string). Not difficult to make script editable (an offset-dd piped to a gpg -d piped to a vim - piped to a gpg -c directed to script.new ), but not enough space to do it on a one liner. Show Sample Output
This is sample output - yours may be different.
```
$ cat script.bash 

#!/bin/bash
echo "Hello, world"

$ echo "eval \"\$(dd if=\$0 bs=1 skip=XX 2>/dev/null|gpg -d 2>/dev/null)\"; exit" > script.secure; sed -i s:XX:$(stat -c%s script.secure): script.secure; gpg -c < script.bash >> script.secure; chmod +x script.secure
Enter passphrase:
Repeat passphrase:

$ ./script.secure 
Enter passphrase:

Hello, world

$ cat script.secure 
eval "$(dd if=$0 bs=1 skip=69 2>/dev/null|gpg -d 2>/dev/null)"; exit
%6&A2%&F%&B%&%4&%
```
5

echo "eval \"\$(dd if=\$0 bs=1 skip=XX 2>/dev/null|gpg -d 2>/dev/null)\"; exit" > script.secure; sed -i s:XX:$(stat -c%s script.secure): script.secure; gpg -c < script.bash >> script.secure; chmod +x script.secure

rodolfoap · 2013-03-09 11:16:48 4
Create executable, automountable filesystem in a file, with password!

This is just a proof of concept: A FILE WHICH CAN AUTOMOUNT ITSELF through a SIMPLY ENCODED script. It takes advantage of the OFFSET option of mount, and uses it as a password (see that 9191? just change it to something similar, around 9k). It works fine, mounts, gets modified, updated, and can be moved by just copying it. USAGE: SEE SAMPLE OUTPUT The file is composed of three parts: a) The legible script (about 242 bytes) b) A random text fill to reach the OFFSET size (equals PASSWORD minus 242) c) The actual filesystem Logically, (a)+(b) = PASSWORD, that means OFFSET, and mount uses that option. PLEASE NOTE: THIS IS NOT AN ENCRYPTED FILESYSTEM. To improve it, it can be mounted with a better encryption script and used with encfs or cryptfs. The idea was just to test the concept... with one line :) It applies the original idea of http://www.commandlinefu.com/commands/view/7382/command-for-john-cons for encrypting the file. The embedded bash script can be grown, of course, and the offset recalculation goes fine. I have my own version with bash --init-file to startup a bashrc with a well-defined environment, aliases, variables. Show Sample Output
This is sample output - yours may be different.
```
Use at your own risk.

# dd if=/dev/zero of=T bs=1024 count=10240;mkfs.ext3 -q T;E=$(echo 'read O;mount -o loop,offset=$O F /mnt;'|base64|tr -d '\n');  echo "E=\$(echo $E|base64 -d);eval \$E;exit;">F;cat <(dd if=/dev/zero bs=$(echo 9191-$(stat -c%s F)|bc) count=1) <(cat T;rm    T)>>F
10240+0 records in
10240+0 records out
10485760 bytes (10 MB) copied, 0.127043 s, 82.5 MB/s
T is not a block special device.
Proceed anyway? (y,n) y
1+0 records in
1+0 records out
9104 bytes (9.1 kB) copied, 0.000116352 s, 78.2 MB/s

(before executing next, make sure /mnt is empty and has nothing mounted, otherwise you can lose files)

# bash F
9191
(I entered 9191, is the password, can be modified in the script)

# l /mnt/
drwx------ 2 root root 12K Jan 31 02:33 lost+found/

# df -h
Filesystem        Size  Used Avail Use% Mounted on
...
/dev/loop0        9.7M  1.1M  8.1M  12% /mnt

# mount
...
/root/F on /mnt type ext3 (rw,relatime,data=ordered)

# umount /mnt 

# head -1 F
E=$(echo cmVhZCBPO21vdW50IC1vIGxvb3Asb2Zmc2V0PSRPIEYgL21udDsK|base64 -d);eval $E;exit;

# E=$(echo cmVhZCBPO21vdW50IC1vIGxvb3Asb2Zmc2V0PSRPIEYgL21udDsK|base64 -d);echo $E
(changed eval x echo)
read O;mount -o loop,offset=$O F /mnt;
```
6

dd if=/dev/zero of=T bs=1024 count=10240;mkfs.ext3 -q T;E=$(echo 'read O;mount -o loop,offset=$O F /mnt;'|base64|tr -d '\n');echo "E=\$(echo $E|base64 -d);eval \$E;exit;">F;cat <(dd if=/dev/zero bs=$(echo 9191-$(stat -c%s F)|bc) count=1) <(cat T;rm T)>>F

rodolfoap · 2013-01-31 01:38:30 5
Command for JOHN CONS

Would create a file with a meaningful title. Dedicated to John Cons, who is annoying us users. Merry Christmas!!! Show Sample Output
This is sample output - yours may be different.
```
$ ls
```
7

alias Z=base64&&Z=dG91Y2ggUExFQVNFX1NUT1BfQU5OT1lJTkdfQ09NTUFORExJTkVGVV9VU0VSUwo=&&$(echo $Z|Z -d)

rodolfoap · 2010-12-24 14:29:19 8
Download all images from a 4chan thread

Im' not interested in images, but that's how I would do it.
This is sample output - yours may be different.
0

curl -s http://boards.4chan.org/wg/|sed -r 's/.*href="([^"]*).*/\1\n/g'|grep images|xargs wget

rodolfoap · 2010-12-12 06:32:19 0
Zenity percent progressbar for scripts accepting parameters

Shows a zenity progressbar for each file in a script, see the samble output. Works with any number, less, equal or greater than 100. x is not initially defined. If used twice in the script, set it: x=0 (for FILE in $@; do echo $[100*++x/$#]; command... "$FILE"; done)|zenity --progress --auto-close Show Sample Output
This is sample output - yours may be different.
```
#!/bin/bash
# Example usage for rotating images:
(for FILE in $@; do echo $[100*++x/$#]; mogrify -rotate -90 "$FILE"; done)|zenity --progress --auto-close

call with:

$ ./script file1.gif file2.jpg file3.png ...
```
0

(for FILE in $@; do echo $[100*++x/$#]; command-for-each-parameter; done)|zenity --progress --auto-close

rodolfoap · 2010-10-05 10:07:04 0
split a multi-page PDF into separate files

Simple alternative to the previous submitted one
This is sample output - yours may be different.
8

pdftk in.pdf burst

rodolfoap · 2010-02-10 13:31:36 4
Print a row of 50 hyphens

Better -and faster- using bash printf. Show Sample Output
This is sample output - yours may be different.
```
$ time printf "%50s\n"|tr \  -
--------------------------------------------------

real	0m0.008s
user	0m0.000s
sys	0m0.008s
```
-2

printf "%50s\n"|tr ' ' -

rodolfoap · 2010-01-07 08:49:46 3
Numbers guessing game

Felt like I need to win the lottery, and wrote this command so I train and develop my guessing abilities. Show Sample Output
This is sample output - yours may be different.
```
N between 1 and 100. Guess? 50
N between 1 and 50. Guess? 20
N between 20 and 50. Guess? 21
Took you 3 tries, Einstein
```
13

A=1;B=100;X=0;C=0;N=$[$RANDOM%$B+1];until [ $X -eq $N ];do read -p "N between $A and $B. Guess? " X;C=$(($C+1));A=$(($X<$N?$X:$A));B=$(($X>$N?$X:$B));done;echo "Took you $C tries, Einstein";

rodolfoap · 2009-12-16 13:24:23 3

Collect a lot of icons from /usr/share/icons (may overwrite some, and complain a bit)

Today I needed to choose an icon for an app. My simpler way: put all of /usr/share/icons in myicons folder and brows'em with nautilus. Then rm -r 'ed the entire dir. Show Sample Output

mkdir myicons && find /usr/share/icons/ -type f | xargs cp -t myicons

rodolfoap · 2009-12-09 17:43:28 0

Find all dotfiles and dirs

find makes it easier, filtering . and .. maxdepth could be removed, finding entries recursively. Removing mindepth causes . to appear Show Sample Output
This is sample output - yours may be different.
```
./.esd_auth
./.scummvmrc
./.gnuplot-wxt
./.subversion
```
1

find -mindepth 1 -maxdepth 1 -name .\*

rodolfoap · 2009-11-24 22:18:33 0

What's this?

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Get curenttly playing track in Last.fm radio

Compare a remote dir with a local dir

You can compare directories on two different remote hosts as well: $ diff -y

Speed up launch of firefox

Compress information DBs of firefox to speed up the launch of browser.

This command provides more color variety for the rainbow-like appearance by generating random color codes from 16 to 231 for adb logcat.

Grab mp3 files from your favorite netcasts, mp3blog, or sites that often have good mp3s

This was gotten from http://www.veen.com/jeff/archives/000573.html. The line will grab all the mp3 files on the urls listed in text file sourceurls.txt (one url per line) . A much more complete breakdown of the line can be found at the web site mentioned above.

Update a namecheap @ A record to point to your current internet-facing IP address

Sets the @ A record for your domain hosted by namecheap to your current internet-facing IP address, logs success or failure with syslog, and logs the data returned to /root/dnsupdate. Change the XXX's as appropriate. More info at: http://www.namecheap.com/support/knowledgebase/article.aspx/29/

edit, view or execute last modified file with a single key-press

Copy this function to command line, press 'Enter' 'f'' 'Enter' to execute (sentence on the left written only for newbies). Hint 'e|x|v|1..9' in front of displayed last modified file name means: "Press 'e' for edit,'x' for execute,'v' for view or a digit-key '1..9' to touch one file from the recent files list to be last modified" and suggested (hidden files are listed too, else remove 'a' from 'ls -tarp' statement if not intended). If you find this function useful you can then rename it if needed and append or include into your ~/.bashrc config script. With the command $ . ~/.bashrc the function then can be made immediately available. In the body of the function modifications can be made, i.e. replaced joe editor command or added new option into case statement, for example 'o) exo-open $h;;' command for opening file with default application - or something else (here could not be added since the function would exceed 255 chars). To cancel execution of function started is no need to press Ctrl-C - if the mind changed and want to leave simple Enter-press is enough. Once defined, this function can with $ typeset -f f command be displayed in easy readable form

Rename files in batch

Shows space used by each directory of the root filesystem excluding mountpoints/external filesystems (and sort the output)

Duplicate installed packages from one machine to the other (RPM-based systems)

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