Hacking Linux Kernel

Unpack it -------- gunzip -c /minirt | cpio -idm OR >>mv minirt minirt.gz >>gzip -d minirt.gz >>cpio -i modify initrc or i...

modify file /usr/share/gs-afpl/8.14/lib/gs_pdfwr.ps and change lines /.standardfonts [ /Courier /Courier-Bold /Courier-Oblique /Courier-Bold...

I have found very few resources for SELinux on the web, which I believe is a idea tool box for the security engineer or for that matter any ...

Make sure you are using a version of Dom0 with kernel support for IP Tables. See my previous post on compiling Xen from source. IP Tables op...

export http_proxy="http://[address]:[port]/"

While recompiling a custom kernel depmod -a creates a "Makefile"-like dependency file, based on the symbols it finds in the set ...

free -m

I used SendMail for SMTP and Qpopper for POP3. Download and install the sendmail package if you don't have it rpm -qa | grep -i sendmail...

For instance this example checks for netfilter support zgrep -i netfilter /proc/config.gz CONFIG_NETFILTER=y

A step by step tutirial for people getting the most out of their PC with Xen virtualization Getting the latest version of Xen mkdir /home/xe...

Want to try out a Linux Distribution on your Windows PC without nuking your Windows MBR? Here is how you go about it. Assuming you partition...

Today I moved to the new version of gcc 4.1.2. When trying to compile Xen, it kept giving me a 'stack_chk_fail' symbol not found err...

Installing Ubuntu 6.10. Open up a terminal and set your root password first using sudo passwd root

Try using the find command find . -maxdepth 4 rather than the overused ls

./a.out | tee trace.txt

I wanted some one-line loop to read a log file containing serial numbers line-by-line, search for a serial using some regular expression, re...

Need a quick and dirty tutorial on enabling loggers in your scripts? Here you go. Download and Install Log-Log4perl-1.06 from CPAN (May pro...

This assumes that you have an account zanwar (set by your cvs admin) and cvs repository Project/Development on the CVS host cvs.cs.uiuc >...

Personally I think Red Hat's network configuration utilities in no where compare to Knoppix or Ubunto for instance. Setting up networkin...

Compile cpp file with debug options g++ -ggdb -fprofile-arcs -ftest-coverage -o hello Hello.cpp Try Running it ./hello Run Code Coverage to...

Some Linux API require the use of updated libraries. A common example is gethostbename command that is not thread safe. Attempting to run t...

Tired of remembering and repeating that long copy command again and again. Use history | grep "scp" and you will get a list of ol...

Open a root shell. The following commands create a temporary directory and copy the files required for the booting of the Linux system (the ...

vi /etc/samba/smb.conf [encrypted] browseable = yes comment = Encrypted FS on USB writable = yes locking = no path = /encrypt...

Download and install uuid-dev, e2fsck and cryptsetup. dd if=/dev/zero of=myencryptedfile.enc bs=1M count=20 losetup /dev/loop2 myencryptedfi...

# Login as root # mkdir myinitrd # cd myinitrd # gzip -dc # edit init do what you want at the top of the script. Usually custom scripts adde...

Use the tee command. Here is an example where I use pipes and the linux cut/paste command to implement a windows like "scanning wireles...

If you want to startup a certain service e.g. vmware in runlevel 4 during system bootup. cd /etc/rc4.d ln -s ../init.d/vmware S90vmware The ...

Make sure you ssh/scp deamon is running. /etc/init.d/ssh start Regenerate host keys for ssh if necessary ssh-keygen -t dsa -f /etc/ssh/ssh_h...

If you have multiple network interfaces on your machine e.g. a wireless (check using iwconfig) and wired. i.e. eth0 and eth1. Linux will end...

A Knoppix installation on you hard drive will use unionfs by default. You can check to see which folders are part of the unionfs tree by usi...

losetup -e AES128 -T /dev/loop7 /dev/sda7 format mke2fs -j /dev/loop7

I prefer using cfdisk over fdisk because it is menu driven. Usually creating a partition table will involve a hda1 primary boot partition fo...

df -h and du -hsc

Needed when mounting a compressed KNOPPIX file found in the linux boot partition. For instance you need to recover some USB modules to place...