can someone explain the meaning of the following shell commands:
1. who / wc -l
2. who / sort > user_names
3. cat students > new_students
4. current_day='date / cut -cl-3'
i would also appreciated if you could tell me some things about the umask
1. what is a good umask value and why?
2.... (2 Replies)
What is the basic syntax for a script that says
do you want to do this?
y - execute this
n - end
not y or n - end and print this
for example if I want to run this:
"Do you want to start this process?"
answer
if y,Y, or yes
then
run the following script (do I put the script with... (10 Replies)
OK...I'm using the latest version of Fedora 10.
My network connection was working fine, and I had several network LAN shares on my desktop. Then I rebooted the system without dismounting those shares first. ooops. <:(
...When the system came back up, my network connection was gone. All... (2 Replies)
Hi all,
OS: fedora release 10
when i try to restart network service, ending up with following errors. There are two interfaces eth0 and eth1
bringing up interface eth0 rtnetlink answers file exists
error adding <IP Address here> to eth0
bringing up interface eth0 rtnetlink answers... (2 Replies)
hello guys!! need 1 favour from u all..
Can u jst tell me the answers for these ques??
1. ls - l _____ : command to return all files that end with single digit and those with TXT extension
2. ls -l report* _______ : command to return all files that start with the word RPT except those with LOG... (1 Reply)
Hello All,
While I am studying on RTNETLINK, I understand that the kernel will send RTM_ADDLINK or RTM_DELLINK if interface is added/removed at kernel space. However, I have a question regarding to the RTNETLINK message if adding or removing ethernet to/from bridge? Since adding or removing... (0 Replies)
Hi,
I have wrote a python program to sum the numbers in a list.However its giving answer one.
Please advise.
MyList =
Number = int(input("Please enter number:"))
for i in range(1, Number + 1):
value = int(input("Enter Numbers %d:" %i))
MyList.append(value)
total =... (3 Replies)
Discussion started by: nag_sathi
3 Replies
LEARN ABOUT DEBIAN
ifscheme
IFSCHEME(8) Commands IFSCHEME(8)NAME
ifscheme - scheme control for network interfaces
SYNOPSIS
ifscheme [-v] [[-s] newscheme]
mapping <interface> script ifscheme-mapping
DESCRIPTION
ifscheme allows you to change network configuraton schemes or query the current scheme. It integrates with the ifup(8) command and inter-
faces(5). For example, you might use this program to configure a "home" scheme and a "work" scheme for a network device on a laptop. When
you move between home and work, a simple command can reconfigure your networking.
If you run the program with no parameters, it will tell what the current network scheme is.
The ifscheme-mapping utility is used to tell the ifup and ifdown utilities about the current scheme.
OPTIONS -v
--verbose
Run in verbose mode. This is passed in to the ifup and ifdown programs as well.
-l
--list list all schemes available/defined in /etc/network/interfaces.
newscheme
-s newscheme
--scheme newscheme
Change to a new network configuration scheme. When the scheme is changed, network interfaces that were using the old scheme will be
taken down and brought back up to use the new configuration scheme. -s or --scheme are mandatory if newscheme begins with a -.
CONFIGURATION
To make the program do anything useful when a scheme is selected, you must edit /etc/network/interfaces to add a mapping for the interface
(or interfaces) that can be controlled on a per-scheme basis. Suppose you want to control eth0 in this way. You might have an existing eth0
configuraton in there, such as:
auto eth0
iface eth0 inet static
address 192.168.1.5
netmask 255.255.255.0
gateway 192.168.1.1
To change this so you can chose between static routing and dhcp, replace it with the following (it helps to ifdown the interface first).
auto eth0
mapping eth0
script ifscheme-mapping
iface eth0-home inet static
address 192.168.1.5
netmask 255.255.255.0
gateway 192.168.1.1
iface eth0-work inet dhcp
Now if you run "ifscheme home" and ifup the interface, you'll get the eth0-home configuration stanza. If you run "ifscheme work", it will
be changed to the eth0-work stanza. You can add additional stanzas as desired, but the label must always be of the form <hardware inter-
face>-<scheme name>.
If you have a second interface (perhaps a wireless network card on eth1), you can duplicate the above for that interface, changing the eth0
and the configuration details as appropriate, but remember to add an iface stanza for every scheme name for the second interface.
FILES
/etc/network/interfaces
the interfaces definition file
/etc/network/run/scheme
the current scheme
/etc/network/run/ifstate
a record of the current state of the interfaces, managed by ifup and ifdown
BUGS
All schemed interfaces will have the same scheme.
Any schemed interface which does not have an entry for the current scheme and is not configured when the scheme is changed will not be suc-
cessfully configured when it is brought up.
SEE ALSO interfaces(5)ifup(8)ifdown(8)DISTRIBUTION
Redistribution is subject to the GNU public license.
AUTHORS
Joey Hess <joey@kitenet.net>, Peter Wilson <pwilson@cs.hmc.edu>
IFSCHEME(8)