Red Hat NETSCAPE MANAGEMENT SYSTEM 6.0 - COMMAND-LINE Instrukcja Użytkownika Pobierz pdf (Strona 53)

are available on your RedHat CD, display the info about the packages, and install them if you

want (installation must be done as root).

Accessing drives/partitions

mount

See here for details on mounting drives. Examples are shown in the next commands.

mount -t auto /dev/fd0 /mnt/floppy

(as root) Mount the floppy. The directory /mnt/floppy must exist, be empty and NOT be your

current directory.

mount -t auto /dev/cdrom /mnt/cdrom

(as root) Mount the CD. You may need to create/modify the /dev/cdrom file depending where

your CDROM is. The directory /mnt/cdrom must exist, be empty and NOT be your current

directory.

mount /mnt/floppy

(as user or root) Mount a floppy as user. The file /etc/fstab must be set up to do this. The

directory /mnt/floppy must not be your current directory.

mount /mnt/cdrom

(as user or root) Mount a CD as user. The file /etc/fstab must be set up to do this. The

directory /mnt/cdrom must not be your current directory.

umount /mnt/floppy

Unmount the floppy. The directory /mnt/floppy must not be your (or anybody else's) current

working directory. Depending on your setup, you might not be able to unmount a drive that you

didn't mount.

7.6 Network administration tools

netconf

(as root) A very good menu-driven setup of your network.

pingmachine_name

Check if you can contact another machine (give the machine's name or IP), press <Ctrl>C when

done (it keeps going).

route -n

Show the kernel routing table.

nslookup host_to_find

Query your default domain name server (DNS) for an Internet name (or IP number) host_to_find.

This way you can check if your DNS works. You can also find out the name of the host of which

you only know the IP number.

traceroute host_to_trace

Have a look how you messages trave to host_to_trace (which is either a host name or IP

number).

ipfwadm -F -p m

(for RH5.2, seen next command for RH6.0) Set up the firewall IP forwarding policy to

masquerading. (Not very secure but simple.) Purpose: all computers from your home network

will appear to the outside world as one very busy machine and, for example, you will be allowed

to browse the Internet from all computers at once.

echo 1 > /proc/sys/net/ipv4/ip_forward

ipfwadm-wrapper -F -p deny

ipfwadm-wrapper -F -a m -S xxx.xxx.xxx.0/24 -D 0.0.0.0/0

(three commands, RH6.0). Does the same as the previous command. Substitute the "x"s with

digits of your class "C" IP address that you assigned to your home network. See here for more

details. In RH6.1, masquarading seems broken to me--I think I will install Mandrake Linux:).

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