Resolve the problem of install VirtualBox addon on Fedora

Error message:
Failed to set up service vboxadd, please check the log file
unable to find the sources of your current linux kernel

# sudo dnf update

#sudo dnf install gcc kernel-devel kernel-headers

Restart the Fedora virtual machine and install VirtualBox Addon

Validate PCIe's Speed and Width under Linux

1. use `lspci` to list all pci devices
The number less than 7f:xx:xx is for CPU0
more than 80:xx:xx is for CPU1

2. use 'lspci -vv" to check the detail of target device
check the "LnkStat:"
 Speed 2.5GT/s is gen1
 Speed    5GT/s is gen2
 Speed    8GT/s is gen3

Width is the PCIe lances

Reference:
https://en.wikipedia.org/wiki/PCI_Express

How to PAUSE and CONTINUE a Linux process

Use kill command to send -STOP signal to pause a process and -CONT signal to continue it.

Example on CentOS6 Desktop:
1. Open a Terminal (name as T1) on Desktop and send "ps -aux | grep bash" to see how much bash in there.

2. Open another Terminal (name as T2) on Desktop and on T1 send "ps -aux | grep bash" to see process id of new created bash (T2)

3. On T1, send "kill -STOP " to pause T2
>T2 is hang

4. On T1, send "kill -CONT " to continue T2
>T2 is back to work
This is useful if a script is running on T2 and you want to pause it and continue it later

Reference:
http://tombuntu.com/index.php/2007/11/23/how-to-pause-a-linux-process/

讓Linux可以解析到WINS下的機器

1. 在/etc/samba/smb.conf新增

[global]
wins server = ip

2. 更改/etc/nsswitch.conf 的hosts解析方式增加wins
hosts: wins dns files


參考資料:
https://bbs.et8.net/bbs/showthread.php?t=885180