LINternUX

Today, we will look at what script is run when you install a rpm. In our example we will look at the script that is run when we perform a kernel installation.  First, let’s look what kernel version is installed on our system, with the this command :

# rpm -qa | grep -i kernel
kernel-2.6.18-92.1.22.el5
kernel-2.6.18-92.1.18.el5
kernel-2.6.18-128.1.6.el5
kernel-headers-2.6.18-128.1.6.el5
#

Let’s view the script that is run when the kernel 2.6.18-128.1.6 is install ;

# rpm -q --scripts kernel-2.6.18-128.1.6.el5
postinstall scriptlet (using /bin/sh):
if [ `uname -i` == "x86_64" -o `uname -i` == "i386" ]; then
   if [ -f /etc/sysconfig/kernel ]; then
      /bin/sed -i -e 's/^DEFAULTKERNEL=kernel-smp$/DEFAULTKERNEL=kernel/' /etc/sysconfig/kernel || exit $?
   fi
fi
/sbin/new-kernel-pkg --package kernel --mkinitrd --depmod --install 2.6.18-128.1.6.el5 || exit $?
if [ -x /sbin/weak-modules ]
   then
   /sbin/weak-modules --add-kernel 2.6.18-128.1.6.el5 || exit $?
fi
preuninstall scriptlet (using /bin/sh):
/sbin/new-kernel-pkg --rminitrd --rmmoddep --remove 2.6.18-128.1.6.el5 || exit $?
if [ -x /sbin/weak-modules ]
   then
   /sbin/weak-modules --remove-kernel 2.6.18-128.1.6.el5 || exit $?
fi
#