This command is useful for mounting ISO images under FreeBSD. You have to the vnode driver in your kernel or loaded as a module. Check for vn driver with "kldstat -v" command: % kldstat -v | grep vn                  8 vn % Configure vnode disk: % vnconfig -v /dev/vn0c image.iso Mount the virtual disk: % mount -r -t cd9660 /dev/vn0c /mnt Access/Check what you need then unmount the disk: % umount /mnt Clear the vnode disk: % vnconfig -u -v /dev/vn0c... Read More

 This command is useful for showing the valid media options for an interfaceifconfig -m ep0   ep0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500         inet 161.81.18.66 netmask 0xfffffff8 broadcast 161.81.18.71         ether 00:12:ff:97:a1:86         media: Ethernet 10baseT/UTP         supported media:                 media 10baseT/UTP                 media 10base5/AUI In this case the interface only has two options twisted pair and AUI (aka thicknet) this is a 3com 3c509 card ifconfig -m fxp0   fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500           inet 161.81.22.103 netmask 0xffffff00 broadcast 161.81.22.255           ether 00:91:44:ec:3f:17       &nb... Read More

 This is the way via software to eject a cdrom under freebsdFor ATA (IDE/EIDE) cdroms the device is /dev/acd0c and the command looks like this: cdcontrol -f /dev/acd0c eject For SCSI cdroms the device is /dev/cd0c and the command would be: cdcontrol -f /dev/cd0c eject I do not have a usb cdrom so I am not sure what that one would look like. Please post a comment if you have seen that one.... Read More

 camcontrol is a very useful command for finding information and for adding and removing SCSI devices.Find what CAM SCSI busses exist and what devices are connected to them: # camcontrol devlist <eUSB Compact Flash 5.07 >        at scbus0 target 0 lun 0 (pass0,da0) <EXABYTE EXB-8505SMBANSH2 0793 >   at scbus1 target 3 lun 0 (pass1,sa0) <IBM CDRM00203\000\000\000\000\000!K BZ26 > at scbus1 target 6 lun 0 (pass2,cd0) # Notice that the USB bus on my system is considered a CAM SCSI bus. I have two busses here. Bus 0 (USB) has a compact flash reader on it at target 0. Bus 1 (SCSI) has a tape drive (sequential access device: sa0) at target 3 and a cdrom drive (cd0) at target 6. Let's say that we want to temporarily take the tape drive off without rebooting the system and go backup another system. Since we only have a tape drive and a cdrom drive this is pretty safe (disk drives with mounted filesystems would be a differen... Read More