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===== Kernel =====

Check loaded modules:

  lsmod 
  cat /proc/modules 

Load manually a module:

  modprobe modulename      #Loads module + dependencies
  insmod modulename        #Loads just the module
  
Modules are stored in:

  cat /proc/modules

Modprobe configuration:

  /etc/modprobe.conf

  
Remove a loaded module:

  rmmod modulename

Compile a Linux Kernel:

  cd /usr/src/linux
  make dep
  make mrprop
  make clean
  make menuconfig
  make
  make CONFIG_DEBUG_SECTION_MISMATCH=y
  make modules 
  make modules_install
  make install

Note:

Regular (vanilla) Kernelsources just know the command 
  make oldconfig
and reads in the content of the ".config" file (inside "/usr/src/linux/.config")

The command
  make cloneconfig 
reads the configuration of the running kernel (/proc/config.gz) and saves it as
  .config
  
Kernel moduls are files stored in:
  /lib/modules/kernel-version/
===== Kernel Commands =====

  uname -r                #Show Kernel version
  uname -a                #Show OS info 
  cat /etc/issue          #Show OS info
  cat /etc/SuSE-release   #Show OS info
  cat /proc/cpuinfo 
  cat /proc/meminfo 
  cat /proc/mounts        #Is more reliable in conflicts/problems than /etc/mtab !!
  cat /proc/filesystems 
  cat /proc/partitions