foremost recovery deleted cpp source code

1. download
   http://apt.sw.be/redhat/el6/en/x86_64/rpmforge/RPMS/foremost-1.5.7-1.el6.rf.x86_64.rpm

2. install
    rpm -ivh foremost-1.5.7-1.el6.rf.x86_64.rpm

3. make sure the location of your deleted files
    /home/user/<path-to-deleted-file>

[root@master01 ~]# df
Àɮרt²Î               1K-°Ï¬q      ¤w¥Î     ¥i¥Î ¤w¥Î% ±¾¸üÂI
/dev/sda2             20642428   2524600  17069252  13% /
tmpfs                  1027468         0   1027468   0% /dev/shm
/dev/sda1               198337     27712    160385  15% /boot
/dev/sda3            181515576    191876 172103248   1% /opt/kccs1
nfssvr:/home/nfs      20642432   2055808  17538048  11% /mnt/nfssvr
 
   /home/user/<path-to-deleted-file> belongs to /dev/sda2

4. recoverying the deleted files
   cd /home/user
   mkdir output
   foremost -vqQ -o output -t cpp -i /dev/sda2

5. lookup results
    ls -l /home/user/output


reference: http://www.unixmen.com/recover-deleted-files-with-foremost/
               http://maitnoobsatwork.blogspot.tw/2012/04/recover-lost-data-using-foremost.html

LVM resize

shell> df
   :

/dev/mapper/VolGroup-lv_home           3783762960     200968     3591357808  1%  /home

   :

shell> umount /home

shell> resize2fs /dev/VolGroup/lv_home 1024G
Please run 'e2fsck -f /dev/VolGroup/lv_home' first

shell> e2fsck -f /dev/VolGroup/lv_home


shell> resize2fs /dev/VolGroup/lv_home 1024G

shell> lvreduce -L 1024G  /dev/VolGroup/lv_home

shell> mount /home

shell> df
   :

/dev/mapper/VolGroup-lv_home           1056894132     204056     1003002988  1%  /home

packagekitd locked

今天在系統發現 packagekitd CPU拉高, 連同yum 以及system-> administrator -> software update都無法正常執行,
查了一些資料, 發現這是系統自我檢查軟體更新, 到一半時當掉所造成
當下解決方法 kill pid or kill -9 pid
取消自我檢查軟體更新 system -> preferences -> software updates , 把Check for updates 改成never

reference: http://itgroup.blueshop.com.tw/towns/hc?n=wodvew&i=405

[RHEL 6]網路保護NetworkManager

新版RHEL6使用NetworkManager來取代system-config-network作為圖形化介面工具，
用來設定與管理網路的相關內容。但用習慣RHEL5.X RHEL4.x的我，實在不想太麻煩
因為諸多不便，設定上有些綁手綁腳，所以決定關掉他，回覆到5.X或4.X的設定方式

/etc/init.d/NetworkManager   關掉即可(service NetworkManager stop & chkconfig NetworkManager  off)

PS.也就是說NetworkManager會把我原來/etc/sysconfig/network-scripts的手動設定失效
     某些Centos/Rhel的安裝類似中, 不會將NetworkManager套件裝起來, 如Server/最小化安裝等