Hittade ett coolt knep i wikipedia, http://en.wikipedia.org/wiki/Magic_SysRq_key#Emergency_reboot
Om din Linux har frusit och inget hjälper så kommer det här knepet att rädda dig från att bryta strömmen!
- 1. Håll ner Alt SysRq (Print Scrn)
- 2. Samtidigt som du håller ner knapparna skriver du REISUB
Det som händer då är att alla program stoppas, alla diskar avmonteras och systemet startas om.
Du slipper döda allt på ett farligt sätt som kan trasa sönder ditt filsystem 
Hittade en bra site som förklarar mycket…
http://www.linuxhomenetworking.com/wiki
Så här kan det se ut på den sidan som handlar om nätverk:
Setting Your NIC’s Speed Parameters with mii-tool
You can set your NIC to force itself to a particular speed and duplex by using the -F switch with any of the following options: 100baseTx-FD, 100baseTx-HD, 10baseT-FD, or 10baseT-HD. Remember that you could lose all network connectivity to your server if you force your NIC to a particular speed/duplex that doesn’t match that of your switch:
[root@bigboy tmp]# mii-tool -F 100baseTx-FD eth0
Unfortunately there is no way to set this on reboot permanently except by placing it the command in the /etc/rc.local file to let it be run at the very end of the booting process or by creating your own startup script if you need it set earlier. Creating your own startup scripts is covered in Chapter 7, ”The Linux Boot Process”.
Hittade en bra site som förklarar mycket…
http://www.linuxhomenetworking.com/wiki
Så här kan det se ut på den sidan som handlar om nätverk:
Setting Your NIC’s Speed Parameters with mii-tool
You can set your NIC to force itself to a particular speed and duplex by using the -F switch with any of the following options: 100baseTx-FD, 100baseTx-HD, 10baseT-FD, or 10baseT-HD. Remember that you could lose all network connectivity to your server if you force your NIC to a particular speed/duplex that doesn’t match that of your switch:
[root@bigboy tmp]# mii-tool -F 100baseTx-FD eth0
Unfortunately there is no way to set this on reboot permanently except by placing it the command in the /etc/rc.local file to let it be run at the very end of the booting process or by creating your own startup script if you need it set earlier. Creating your own startup scripts is covered in Chapter 7, ”The Linux Boot Process”.
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