merge a.pdf b.pdf and c.pdf and create ./out.pdf

I've used this scan to sucessfully find many rogue APs on a very, very large network.

Using a widescreen monitor, I often get annoyed that the RDP window is too high, or too narrow for what I want to display. In this example, I'm on a 1680 x 1050 display.

get desired info from machine and pipe it txt file.

With a full installation of Solaris 10, the graphical login and desktop will start by default. This command will disable that feature. To enable it again use: /usr/dt/bin/dtconfig -e

adobe updater keeps popping up. (normal update fails, probably due to insufficient rights)

(src: http://aricsblog.blogspot.com/2007/12/adobe-updater-crashes-on-mac-os-x-and.html)

Very handy and time-saving.

Do a 'ctrl+ r' on command prompt. You will see a "(reverse-i-search)`':" mark. Just type any sub-string of the command you want to search(provided you have used it sometime in the same session).

Keep on searching by repeatedly pressing ctrl+r. Press enter once you get the desired command string.

This is great if you are behind a router that does not support dynamic dns updates!

Example: AT&T u-verse gateway...

Put this in a script and run it as a cron job.

You can replace "sort -nu" with "sort -u" for a word list sorted or "sort -R" for a random-sorted line

(edit: corrected)

with 'mii-tool -w eth0' you can watch the interface for changes of the link status

Helpful when we want to do mass file renaming(especially mp3s).

somewhat faster version to see the size of our directories. Size will be in Kilo Bytes. to view smallest first change '-k1nr' to '-k1n'.

readlink -f accepts a relative, noncanonical path and emits the corresponding canonical, absolute path.

Before doing this, back-up all data on any ext3 partitions that are to be converted to ext4.

After running previous command you MUST run fsck, is needed to return the filesystem to a consistent state.

Edit /etc/fstab and change the 'type' from ext3 to ext4 for any partitions that are converted to ext4.

If you should happen to find yourself needing some binary numbers, this is a quickie way of doing it. If you need more digits, just add more "{0..1}" sequences for each digit you need. You can assign them to an array, too, and access them by their decimal equivalent for a quickie binary to decimal conversion (for larger values it's probably better to use another method). Note: this works in bash, ksh and zsh. For zsh, though, you'll need to issue a setopt KSH_ARRAYS to make the array zero-based.

order the files by modification (thanks stanishjohnd) time, one file per output line and filter first 10

ditto can be used to "thinnify" Mach-O Universal binaries to separate unncessary code from your machine. For example, doubleTwist.app shaved off around 10 MB while Google Earth went from 112 MB to 62 MB after extracting only the i386 code from them.

Thankfully, the ssh command allows you to specify multiple tunnels through the same server in one command.

Remeber if you want a priviliged port on your machine, you must use root or sudo account.

Intended for dynamic ip OpenDNS users, this command will update your OpenDNS network IP.

For getting your IP, you can use one of the many one-liners here on commandlinefu.

Example:

I use this in a script which is run by kppp after it has successfully connected to my ISP:

---

#!/bin/bash

IP="`curl -s http://checkip.dyndns.org/ | grep -o '[[:digit:].]\+'`"

PW="hex-obfuscated-pw-here"

if [ "$IP" == "" ] ; then echo 'Not online.' ; exit 1

else

wget -q --user=topsecret --password="`echo $PW | xxd -ps -r`" 'https://updates.opendns.com/nic/update?hostname=myhostname&myip='"$IP" -O -

/etc/init.d/ntp-client restart &

fi

---

PS: DynDNS should use a similar method, if you know the URL, please post a comment. (Something with members.dyndns.org, if I recall correctly)

This command gives you the number of lines of every file in the folder and its subfolders matching the search options specified in the find command. It also gives the total amount of lines of these files.

The combination of print0 and files0-from options makes the whole command simple and efficient.

It works like a "tail -f" on several files.

Use the number keys 0-9 to set a baseline in the numbered window.

Pressing "b" let you scroll back in one of the windows.

Uses logger in a while loop to log memory statistics frequently into the local syslog server.

Command binds a set of commands to the F12 key.

Feel free to alter the dashboard according to your own needs.

How to find the key codes?

Type

Then press the desired key (example: F5)

Try

or

!* is all of the arguments to the previous command rather than just the last one.

This is useful in many situations.

Here's a simple example:

oops!

[exit vi, twice]

expands to: cd /stuff