linux
Quickly fixing SSH when the remote key changes!
So, you cloned your virtual machine and made sure it has the same MAC addresses so that it would pull the same IP from the DHCP server lease. but the next time you click on your SSH icon, it fails.
Does this look familiar?
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@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
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IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!Well this is the magic line:
Offending key in /home/someuser/.ssh/known_hosts:19 Easy batch renaming in Ubuntu (and other debian systems)
Ever want to rename 300 .foo files to .bar? wish you could do this:
mv *.foo *.barHere is the answer: Debian Rename included in ubuntu.
this example renames all .php5 files to .php
rename ‘s/\.php5/.php/’ *.php5 SCITE: Make those line number show every time
first, open scite from a terminal as root using:
sudo sciteWhen the editor is open choose : "Open Global Option File" from the Options Menu
uncomment or enter these lines:
line.margin.visible=1
line.margin.width=4Next time you open scite, the line numbers should be there already.
Cheers!
Turn a folder full of pictures into a timelapse video
So I like to build things, I also like to set up a GoPro camera above my desk to capture timed photos of my builds, but the results are usually 5 - 8 gigabytes of pictures that need to be turned into movies, so here is what I do:
ASSUMPTIONS: your pics all end in .JPG and the are all numbered sequentially. and that your system can handle video as big as your fotos.
I run this line of code from the folder where the pictures are:
Recursive search for files with specific content using GREP
So you know that somewhere in your source folder (/source) that there is a script that uses the foo() function but you cant remember which one and there are thousands of files, what do you do?
You grep them!
grep -R -i -n 'foo()' *
Lets break it down, first we are grepping files, the -R indicates to search recursively, -i indicates we want to ignore case, and -n indicates we want to know which line of the file grep finds our search string on. then the search string in single quotes and lastly, a finame wildcard, in this case, search through every file.
What ports are open on my Linux box?
Running the following code shows what opports are open on yourtr linux system:
netstat -anp --tcp --udp | grep LISTEN Rename those *.JPG files to *.jpg files in linux
This simple line of code, when executed from within the directory will rename all picture files with the .JPG extension to have the .jpg extension
for x in *.JPG; do mv "$x" "${x%.JPG}.jpg"; done Tame the flaky SFTP
a big thanks to Beau Henderson, Technical Manager over at Site5 for reminding me to put the following in my personal .ssh/config file:
ServerAliveInterval 180
TCPKeepAlive yesThis solves many issues with timeouts.
Quick and dirty iso rip on Ubuntu or on any Linux
The trick here is to know what device file on linux is used as your cdrom/dvdrom drive, then its a simple matter of:
dd if=/dev/cdrom of=~/cdrom_image.iso Sys admin tools on linux
I found this in the google cache and so I copied it, no author, sorry whoever you are. It used to be on the http://www.moolux.org/ website.