rpm

remove rpm:

rpm -e test

query info about specific rpm

ex: 

rpm -q  test

rpm for red hat and cent os

Because red hat & cent os are related , we can get rpm for ret hat from rpm for cent os 

init network

開機網路設定:

/etc/sysconfig/network/

ifcfg-lo

ifcfg-eth0

blk_queue_make_request

 void blk_queue_make_request (request_queue_t * q, make_request_fn * mfn);

define an alternate make_request function for a device

ARGUMENTS

q

the request queue for the device to be affected

mfn

the alternate make_request function

linux driver command

lsmod 

顯示目前已經載入的模組清單

insmod 

load module into kernel

ex: insmod hello.ko

rmmod:

remove module

modprobe:

like insmod,  but also install dependent modules

(the module dependency is stored in /lib/modules/x.y.z/modules.dep)

modprobe -r:

remove module

modinfo:

show module info

linux kernel version

red hat enterprise linux 4 update 4

core_2.6.9-42.EL_i686  &  core_2.6.9-42.ELsmp_i686,  core_2.6.9-42.ELsmp_x86_64,  core_2.6.9-42.EL_x86_64

red hat enterprise linux 5 update 1

core_2.6.18-53.el5_i686  &  core_2.6.18-53.el5_x86_64

red hat enterprise linux 5 update 2

core_2.6.18-92.el5_i686  &  core_2.6.18-92.el5_x86_64

suse linux enterprise server 9

core_2.6.5-7.244-smp_x86_64

suse linux enterprise server 10 

core_2.6.16.21-0.8-smp_i686  & core_2.6.16.21-0.8-smp_x86_64

suse linux enterprise server 10 sp1

core_2.6.16.46-0.12-smp_x86_64  

suse linux enterprise server 10 sp2

core_2.6.16.60-0.21-default_i686   ,core_2.6.16.60-0.21-default_x86_64

LVM

(1) 實體磁碟 --> PV( physical volume)

1. change id to 8e

ex:

   (a) fdisk  /dev/hda

   (b) p

         show information of hda

   (c)  t -->  1 --> 8e

        modify partition 1 's id to 8e

   (d) w

         alter partition table

   (e) partprobe

         let kernel read newest partition table

2. create pv  

   (a)pvscan:

        show information of pv

   (b)pvcreate