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Validate openssh key & print checksum
This is sample output - yours may be different.
1

ssh-keygen -l -f [pubkey] | awk '{print $2}' | tr -ds ':' '' | egrep -ie "[a-f0-9]{32}"

wwest4 · 2009-02-05 17:42:30 16
Getting started with tcpdump

At some point you want to know what packets are flowing on your network. Use tcpdump for this. The man page is obtuse, to say the least, so here are some simple commands to get you started. -n means show IP numbers and don't try to translate them to names. -l means write a line as soon as it is ready. -i eth0 means trace the packets flowing through the first ethernet interface. src or dst w.x.y.z traces only packets going to or from IP address w.x.y.z. port 80 traces only packets for HTTP. proto udp traces only packets for UDP protocol. Once you are happy with each option combine them with 'and' 'or' 'not' to get the effects you want.
This is sample output - yours may be different.
2

tcpdump -nli eth0; tcpdump -nli eth0 src or dst w.x.y.z; tcpdump -nli eth0 port 80; tcpdump -nli eth0 proto udp

jonty · 2009-02-05 17:41:55 16
Get line count for any file ending with extension recursively rooted at the current directory.
This is sample output - yours may be different.
2

find . -name "*.py" | xargs wc -l

rlotun · 2009-02-05 17:39:44 29
Create files of arbitrary size in Windows

This command creates a file of arbitrary size in a windows environment. Show Sample Output
This is sample output - yours may be different.
```
fsutil file createnew deleteme 1024
File C:\deleteme is created

C:\>dir deleteme
...
Directory of C:\
02/05/2009  12:33 PM             1,024 deleteme
               1 File(s)          1,024 bytes
               0 Dir(s)   8,777,101,312 bytes free
```
0

fsutil file createnew FILENAME filesize(inbytes)

archlich · 2009-02-05 17:36:33 21
Convert an ssh2 public key to openssh format
This is sample output - yours may be different.
0

ssh-keygen -i -f $sshkeysfile >> authorized_keys

wwest4 · 2009-02-05 17:32:02 30
add a little color to your prompt
This is sample output - yours may be different.
0

PS1="\[\033[44;1;37m\]\u\[\033[0m\]@\h\\$ "

elofland · 2009-02-05 17:29:18 25
Add all unversioned files to svn
This is sample output - yours may be different.
8

svn st | grep "^\?" | awk "{print \$2}" | xargs svn add $1

mk · 2009-02-05 17:28:53 31
Mount a .iso file in UNIX/Linux

"-o loop" lets you use a file as a block device
This is sample output - yours may be different.
46

mount /path/to/file.iso /mnt/cdrom -oloop

nerd65536 · 2009-02-05 17:28:06 33
Klingon programming; weak code must die
This is sample output - yours may be different.
-6

gcc -Wall -Werror -o prog prog.c || rm -f prog.c

devoid · 2009-02-05 17:26:51 19
Search for in which package the specified file is included.
This is sample output - yours may be different.
1

/bin/rpm -qf /etc/passwd /etc/issue /etc/httpd/conf/httpd.conf

salexkidd · 2009-02-05 17:24:28 188
Make bash look like DOS

Credit goes here: http://blag.xkcd.com/2008/12/03/some-lists/ Show Sample Output
This is sample output - yours may be different.
```
user@hostname:~$

becomes:

C:\home\user>
```
0

export PS1='C:${PWD//\//\\\}>'

nerd65536 · 2009-02-05 17:23:53 25
Dump root ext3 fs over ssh

...can do similar w/ tar, dd, xfsdump, e2fsdump, etc.
This is sample output - yours may be different.
5

dump 0f - / | bzip -c9 | ssh user@host "cat > /home/user/root.dump.bz2"

wwest4 · 2009-02-05 17:22:32 15
Resets a terminal that has been messed up by binary input
This is sample output - yours may be different.
1

reset

nerd65536 · 2009-02-05 17:18:48 19
find process associated with a port

e.g. fuser 25/tcp (see which pid is listening on smtp)
This is sample output - yours may be different.
13

fuser [portnumber]/[proto]

wwest4 · 2009-02-05 17:11:04 28
Reset terminal that has been buggered by binary input or similar
This is sample output - yours may be different.
5

stty sane

wwest4 · 2009-02-05 17:07:53 17
Display total Kb/Mb/Gb of a folder and each file
This is sample output - yours may be different.
1

du -hc *

eluis · 2009-02-05 17:04:21 18
Clearcase find branch
This is sample output - yours may be different.
-1

ct find -avobs -nxname -element 'brtype(branch_name)' -print 2>/dev/null

naseer · 2009-02-05 17:02:29 23
(Inside of a shell script) Make executable a BeanShell script under Linux/Cygwin

The two lines below are for a BeanShell script so it can be executed under Linux and Cygwin. Also, bsh.jar must be in the CLASSPATH environment variable, or in the jre/lib/ext/ directory of the JVM. #! /bin/sh ///bin/true; exec java bsh.Interpreter "$0" "$@"
This is sample output - yours may be different.
0

///bin/true; exec java bsh.Interpreter "$0" "$@"

chmx · 2009-02-05 17:00:05 21
List just the executable files (or directories) in current directory

Does an 'ls' on just the files and directories in the current directory with an execute bit turned on. This version will list directories. Just tack on "-type f" to the start of the find to omit listing directories and list only files.
This is sample output - yours may be different.
1

ls -dF `find . -maxdepth 1 $ -perm -1 -o \( -perm -10 -o -perm -100 $ \) -print`

wam · 2009-02-05 16:59:38 17
Edit any script executable by the user.

Substitute nano with your favorite editor, of course.
This is sample output - yours may be different.
-2

nano `which script`

fzero · 2009-02-05 16:57:41 19
cat a file backwards

Or "tail -r" on Solaris.
This is sample output - yours may be different.
8

tac file.txt

systemj · 2009-02-05 16:54:45 25
Identify a PKCS#8 Private Key

a pkcs8 key will have integer 00 at offset 4 and an rsaEncryption object at offset 9
This is sample output - yours may be different.
-1

openssl ans1parse -inform DER < [priv key]

wwest4 · 2009-02-05 16:54:19 18
Convert a PKCS#8 private key to PEM format
This is sample output - yours may be different.
-1

openssl pkcs8 -inform DER -nocrypt -in [priv key] -out [pem priv key]

wwest4 · 2009-02-05 16:52:34 20
python smtp server

This command will start a simple SMTP server listening on port 1025 of localhost. This server simply prints to standard output all email headers and the email body.
This is sample output - yours may be different.
76

python -m smtpd -n -c DebuggingServer localhost:1025

jemerick · 2009-02-05 16:50:44 87
Turn /path/to/dir and subdirectories into a project tree

changes group ownership of all files/dirs in /path/to/dir to a project group [projgroup] and then gives the sgid bit to directories in that tree - all subsequently created files will inherit [projgroup]'s gid.
This is sample output - yours may be different.
0

chgrp -R [projgroup] ; find /path/to/dir -type d -exec chmod g+s {} \;

wwest4 · 2009-02-05 16:49:24 17
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put current directory in LAN quickly

This works on all versions of python 2.X. Tested on Linux and bundled python versions on Mac OSX and Solaris / UNIX Note: Serves globally on port 8000. Ctrl+c to stop. Don't start the server and leave it on a internet connected machine. :)

Detect if we are running on a VMware virtual machine

If you run this command on a VMWare Virtual Machine, it will return the string "VMware Virtual Platform". If you run it on a physical machine, it will return nothing. Useful for having a script determine if it's running on a VM or not. Of course, you must have dmidecode installed for this to work. Try it this way in a script: ISVM=$(dmidecode | awk '/VMware Virtual Platform/ {print $3,$4,$5}') Then test if $ISVM has text in it, or is blank.

Create a continuous digital clock in Linux terminal

Same effect, only shell commands.

Download all videos in your Boxee queue

Gets all videos in your boxee queue with a URL associated with them and attempts to download each using get_flash_videos

Files extension change

Changing a file extension to a new one for all files in a directory.

One liner to kill a process when knowing only the port where the process is running

-k (kill option ) . To kill all processes accessing this port

Convert clipboard HTML content to markdown (for github, trello, etc)

I always wanted to be able to copy formatted HTML, like from emails, on trello cards or READMEs... but the formatting is always wrong... But from this two links: * https://jeremywsherman.com/blog/2012/02/08/pasting-html-into-markdown/ * http://stackoverflow.com/questions/3261379/getting-html-source-or-rich-text-from-the-x-clipboard For instance, to to copy an formatted email to a trello card, just: 1. Select the email body 2. run: xclip -selection clipboard -o -t text/html | pandoc -f html -t markdown_github - | xclip -i -t text/plain 3. Paste in your trello card 4. Profit! 8-)

google tts

Advanced python tracing

Trace python statement execution and syscalls invoked during that simultaneously

Git diff last two commits

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