Programming :: Shell Script And Administration Of A System - Change Or Set The IP Address And Subnet Mask
Aug 26, 2010
tasks of an administrative level that we can use Shell Script to automate them. It's a kind of homework for me to figure out how to automate those tasks. Using PHP and Shell Script design and develop a Web Interface to change or set the IP Address and Subnet Mask of the UNIX / Linux System. The related services must be restarted automatically for the new IP Address and Subnet Mask to take effect. No user name and password should be asked for when using that Web Interface. How would you do it?
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Apr 5, 2010
I am using ubuntu Lucid and connected to a network with windows machines.Our network admin changed some settings in the network, and all machines need to change their subnet masks to access local machines (e.g. I am getting "unable to mount" message when I try to connect other Windows PC's on the network.)
If I open the connections panel, and "Edit" the "Auto eth0", I can get: IPv4 Settings -> Method -> Manual -> Addresses -> Add .And I am pretty sure I will put new subnet mask address into "Netmask" box, what to put others? Namely:
IP Address, Netmask, Gateway and below:
DNS Servers, Search Domains
I can get some info about my network connection by right clicking network icon on the panel, and select "Connection Information" Tried to fill manual settings with some of those info (the ones made some sense to me) but I still cannot mount windows network drives, plus my internet connection dies.So, is there any way to change Subnet Mask "ONLY", without touching any other setting.
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Jan 18, 2010
How do i find my internet address, subnet mask, gateway,etc in Ubuntu?
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Feb 11, 2010
for providing an earlier solution from which I have modified and butchered the below script.The intended purpose of this script is to take a subnet mask for example 255.255.255.0 and turn it into the corresponding wildcard mask value in this case it would be /24I have got to the point where I have the binary value, the script is
Code:
#!/bin/sh
#takes mask from ifconfig
[code]...
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Jan 10, 2011
I'd like to know some good resources, links, e-books to learn basic Linux system administration scripting. I know how to write very basic BASH shell scripts so I'm still at beginner level. There are so many docs out there that I'd like to narrow down people's opinion's on the best easy to understand resources that are available. Eventually I'd like to learn basic PERL as well.
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Aug 9, 2010
How do i mask my ip address with ubuntu 10.04
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Nov 17, 2010
I have a local proxy server running on my computer, but I want to add a twist to it. I have multiple connections going through the proxy, but what I'd like to is that all outgoing connections Mac Address' will be different from the one the connecting systems. Mask or even alter them, if possible.
Yes, I know the idea itself sounds weird, but I'm attempting a few ideas for a project I'm working and I ran in to this problem. Please note that it's impossible for me to change the MAC Address' on the systems connecting through the proxy (they're gaming consoles, to be specific.)
I'm currently running the latest version of Ubuntu.
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Aug 2, 2011
Code...
I am somewhat confident that there is a neater way.
Question: Does anybody know the answer?
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Jul 26, 2011
I just changed my CentOS server from DHCP to static IP address. After the change, I cannot ping other hosts on the same subnet. (I can ping the CentOS itself).The IP address of CentOS is 192.168.0.202.After pinging 192.168.0.106 (106 is on and other host can ping it), arp -a shows? (192.168.0.106) at <incomplete> on eth0 It looks ARP cannot resolve MAC address of hosts 192.168.0.106.
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Jul 25, 2011
I need to find myselfe unused IP address in some subnet.
How to determine that particular IP is ununsed in that subnet without asking network admin ?
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Jan 23, 2010
I have a setup samba and want to get the correct security permissions when my wife creates / copies files from her camera onto the shared/mapped drive on her new laptop (windows 7) I want the permissions set to 770 or maybe 760. See my config below.
Now I can get it to create 760 but even if I change the mask it still generates the same permissions. After every change I restart the samba service. the umask is still 0022, do not know if that makes a difference? The directory permission's are correct with this mask. Do I need to look at groups?
[Code]...
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May 20, 2009
Is there any tool or command where I can track down the IP-ADDRESS of a machine within the subnet using its MAC-ADDRESS .
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Apr 12, 2010
I need a way to change the machine MAC address via a C code in linux. Ive find a way to retrieve it but not to change it.
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Oct 30, 2010
I have an assignment that I have to change the prompt of shell through C.
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Feb 3, 2011
I have a box that's used as an SFTP server. All users have restricted shell so they can only use SFTP to send and receive files. But it makes it hard to have them change their passwords. I thought that if we had a web page set up where the user could enter their username, old password, new password and confirmed new password, that this would be the easiest solution.
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Nov 18, 2010
after i made the change to my shell type, that from SH to TCH, and back again, i lost my coloring for my file system, if you know what i mean, folders always come in blue, and devices in yellow hope you understand? now everything i do can't seem to differentiated between files colors anymore.
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Jul 22, 2011
I have TWO L3 + router switch (say switch1 and switch2). I created VLAN100 with VLAN ID 100 in both the switches. I created router 192.168.1.1/24 in Switch1. I created router 192.168.2.1/24 in Switch2. Switch1 is connected with 1.x/24 PCs. PCs are configured with 1.1 gateway. Switch2 is connected with 2.x/24 PCs. PCs are configured with 2.1 gateway. Both Switch1 and switch2 are connected by a trunk to carry VLAN100 data.
1)I have few PCs of 1.x connected to say Switch1 Is it possible for PC with IP 192.168.1.100(x) to ping PC with IP 192.168.2.100(y)?What are the configuration required in both switches to make them communicate ? All the device in both the subnets should ping/communicate with each other.
2)Move PC (192.168.1.100) to switch2. Move PC (192.168.2.100)to switch1.What will happen when PC(1.100) ping (2.100) and vice versa?What will happen when PC(say 1.80 in switch1) pings PC (say 1.100 in switch2) and vice versa? What will happen when PC(say 1.80 in switch1) pings PC (say 2.100 in switch1) and vice versa?
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Mar 1, 2010
This is on Fedora 11. How do I start up a shell script when the system starts?
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Apr 7, 2010
I am trying to get the count of number of CD-ROMs attached with my Linux system using a bash shell script. I have decided to use the following method for it:
Code:
debian:~# cat /proc/sys/dev/cdrom/info | grep "drive name:"
drive name: sr0 hdb
So basically I know that there are two CD-ROMs attached to the system. Now there can be three also like this:
Code:
debian:~# cat /proc/sys/dev/cdrom/info | grep "drive name:"
drive name: sr0 sr1 hdb
All I want to do is in my shell script to get the count of the devices in a variable using the above command.
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Jul 26, 2011
I am using centOS 5.0. After I change from DHCP to static IP address, I cannot ping hosts on the same subnet. The error message says destination host unreachable. Before I made the changes I was able to ping and now even I change it back to DHCP I still cannot ping with the same destination host unreachable message. The centOS is running on VMware on a Windows host.
ifconfig shows
eth0 Link encap:Ethernet HWaddr 00:0C29:A1:9A:10
inet addr: 192.168.0.202 Bcast:192.168.0.255 Mask: 255.255.255.0
inet6 addr ......
After pinging 192.168.0.106 (106 is on and other host can ping it), arp -a shows ? (192.168.0.106) at <incomplete> on eth0 I tried different ways by disabling the firewall and and disabling SE protection. No Luck.
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Jul 4, 2011
I installed Redhat Enterprise linux server5. it has two LAN card and two subnet connected to these two LAN card. i can browse network from these two network easily. But i created VLAN on one network card.Now i cant browse network from these VLAN subnet.
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Jun 30, 2011
I am trying to fix a perl script, and I really suck at perl. But I think this problem will be easy for people who know it.
The problem is, I have an old setup script someone wrote many years ago. It fails if the standard shell is dash and not bash. The only way I've gotten it to work is to point /bin/sh to bash. I looked thru the script and it uses "system" many places, and I think that's the problem.
I searched for it and found this link:url
My plan is to include this function:
Code:
sub system_bash {
my @args = ( "bash", "-c", shift );
system(@args);
}
Then I could simply change all calls to system into system_bash and it should work?
The parameter to the system calls is usually some variable. What if the parameter is a list already? Do I need to test for it somehow, and if it's a list, prepend "bash" and "-c" to the list? How do I do that?
In the script there are lots of places like this:
my $error = system($cmd);
if ($error) {
die/warn "some error message";
}
Shouldn't there be a return in the system_bash function?
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Jul 9, 2010
for my system administartion I want to know sudosh package, wchich is capable of recording whatever commands the user types..
Now I have download the .tar file but I am unable to proceed further.
what to do next so that I can record my user commands?
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Jan 9, 2011
I'm trying to follow the directions here. However, I don't have an "administration" folder. I only see Boot and System Volume Information and bootmgr. Where is the folder? Did I install something wrong? I didn't get this problem on my other laptop.
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Jul 17, 2009
Have folks tried Puppet before for system administration? Puppet is system administration Automated [URL]Following article mentions that;
[Code]....
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Dec 16, 2009
I wanted to look at services, system->admon -> menu only has 7 things on it? I think it should have a lot more?
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Jan 7, 2010
I'm Using 9.04/Gnome. I was looking in System>Administration>Services and wonder if I need them All of below enabled? It seems like duplication to me.
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Jan 15, 2010
what happened to the Security tab that used to be located in System/Administration/Log in Window I'm trying to figure out how to get a Live USB to boot to my user name and password.
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Mar 6, 2010
I'm newbie to Ubuntu, I have found that under System > Administration > Services options is missing. Also Networking option is missing.The Ubuntu Version : Ubuntu 9.10 - the Karmic Koala - released in October 2009
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May 4, 2011
I just recently upgraded to Natty Narwhal and I cant seem to find the System menu. i understand that things have changed cause of the new interface. Where can i find System->Administration. If its not available whats the equivalent?
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