Visit Our UNIX and Linux User Community

Top Forums Shell Programming and Scripting How to get the correct IP on a Linux server? Post 302846671 by alister on Sunday 25th of August 2013 11:42:28 AM
Old 08-25-2013
I am no longer competent on Linux (it's been more than 5 years since I used it regularly), but perhaps this will provide more specific information than the simpler ip route?
Code:
ip route get <addr>

Where <addr> is any destination address to which you do not have a direct host-host or host-subnet route. Perhaps you could use 8.8.8.8 (one of Google's public dns ip addresses).

ip route get doesn't actually send a packet, it only uses the kernel's routing information to determine how such a packet would be sent.

Regards,
Alister
These 2 Users Gave Thanks to alister For This Post:
 
Test Your Knowledge in Computers #367
Difficulty: Medium
The Single UNIX Specification specifies vi, so every conforming UNIX system must have it.
True or False?

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Correct time in server

Hi, we have a server which when we check time it has different time for different user. When we're using root user, the time is correct but when we login as individual user the time is delayed 1 hour. How can we correct the time when we're using individual user like my own user? Please help me to... (4 Replies)
Discussion started by: ayhanne
4 Replies

2. Red Hat

microsoft Server 2008 Active authentication to a linux server

Hi, Please could someone advise I'm trying to use winscp from a Window server 2008 R2, but i need to add the authentication key to access the linux rh 5.4 servers ? What is the best way of approaching this ? If there are any web links that could help me do this, that would be good. ... (1 Reply)
Discussion started by: venhart
1 Replies

3. Shell Programming and Scripting

Copy folder and files from unix server to linux server

We would be migrating unix solaries to Linux redhat. Basically source is unix and target is linux. i would like to copy entire file system unix/source/* to target linux/souce/* but target linux has only folder setup so what ever files copied need to be placed in the linux server with same... (8 Replies)
Discussion started by: balajikalai
8 Replies

4. Shell Programming and Scripting

Connect (SSH) to Windows server via Linux server through a script and passing command.. but failing

I am trying to connect to Windows server via Linux server through a script and run two commands " cd and ls " But its giving me error saying " could not start the program" followed by the command name i specify e g : "cd" i am trying in this manner " ssh username@servername "cd... (5 Replies)
Discussion started by: sunil seelam
5 Replies

5. Shell Programming and Scripting

Copy files from Linux server to Windows server

Hi All, I am generating report in a Linux server and once the report is generated the report(.txt file) needs to be automatically saved in a Windows servers. So i am looking for a script to transfer the file automatically from Linux server to Windows server? Please advise. Thanks... (3 Replies)
Discussion started by: arunmanas
3 Replies

6. Homework & Coursework Questions

Configure the AD Window server with Linux server(google Authenticator is installed)

Hi my name is Manju. ->I have configure the two way authentication on my linux server. ->Now I am able to apply two way authenticator on particuler user. ->Now I want to map this linux server to my AD server. ->Kindly tell me how to map AD(Active Directory) with this linux server. ... (2 Replies)
Discussion started by: manjusharma128
2 Replies

7. Linux

How to connect Linux server (configure two way authentication) with Windows server?

Hi my name is Manju. ->I have configure the two way authentication on my linux server. ->Now I am able to apply two way authenticator on particuler user. ->Now I want to map this linux server to my AD server. ->Kindly tell me how to map AD(Active Directory) with this linux server. ... (0 Replies)
Discussion started by: manjusharma128
0 Replies

8. Windows & DOS: Issues & Discussions

Passwordless login from Linux server to windows server

Hi, I am a newbie and has been given a task to connect to a windows server from a linux server (using putty of course; for file transfer) that too passwordless. Searching through google I found "ssh-keygen" but this also couldn't work because as I tried ssh <username>@<windowsServerIP>, it says... (5 Replies)
Discussion started by: pratria
5 Replies

9. Shell Programming and Scripting

Linux correct permissions for .bash_aliases

Above is a search string I tried on Google that produced lots of hits but not much in the way of clues. And I wasn't looking for clues. So I decided, for the first time, to ask the question here. What are the correct permissions for the .bash_aliases file? iwrong (1 Reply)
Discussion started by: iamwrong
1 Replies
routing(7P)							     Protocols							       routing(7P)

NAME
routing - system support for packet network routing DESCRIPTION
The network facilities provide general packet routing. The routing interface described here can be used to maintain the system's IPv4 rout- ing table. It has been maintained for compatibility with older applications. The recommended interface for maintaining the system's routing tables is the routing socket, described at route(7P). The routing socket can be used to manipulate both the IPv4 and IPv6 routing tables of the system. Routing table maintenance may be implemented in applications processes. A simple set of data structures compose a "routing table" used in selecting the appropriate network interface when transmitting packets. This table contains a single entry for each route to a specific network or host. The routing table was designed to support routing for the Internet Protocol (IP), but its implementation is protocol independent and thus it may serve other protocols as well. User programs may manipulate this data base with the aid of two ioctl(2) commands, SIOCADDRT and SIOCDELRT. These commands allow the addition and deletion of a single routing table entry, respectively. Routing table manipulations may only be carried out by privileged user. A routing table entry has the following form, as defined in /usr/include/net/route.h: struct rtentry { unit_t rt_hash; /* to speed lookups */ struct sockaddr rt_dst; /* key */ struct sockaddr rt_gateway; /* value */ short rt_flags; /* up/down?, host/net */ short rt_refcnt; /* # held references */ unit_t rt_use; /* raw # packets forwarded */ /* * The kernel does not use this field, and without it the structure is * datamodel independent. */ #if !defined(_KERNEL) struct ifnet *rt_ifp; /* the answer: interface to use */ #endif /* !defined(_KERNEL) */ }; with rt_flags defined from: #define RTF_UP 0x1 /* route usable */ #define RTF_GATEWAY 0x2 /* destination is a gateway */ #define RTF_HOST 0x4 /* host entry (net otherwise) */ There are three types of routing table entries: those for a specific host, those for all hosts on a specific network, and those for any destination not matched by entries of the first two types, called a wildcard route. Each network interface installs a routing table entry when it is initialized. Normally the interface specifies if the route through it is a "direct" connection to the destination host or network. If the route is direct, the transport layer of a protocol family usually requests the packet be sent to the same host specified in the packet. Otherwise, the interface may be requested to address the packet to an entity different from the eventual recipient; essentially, the packet is forwarded. Routing table entries installed by a user process may not specify the hash, reference count, use, or interface fields; these are filled in by the routing routines. If a route is in use when it is deleted, meaning its rt_refcnt is non-zero, the resources associated with it will not be reclaimed until all references to it are removed. User processes read the routing tables through the /dev/ip device. The rt_use field contains the number of packets sent along the route. This value is used to select among multiple routes to the same desti- nation. When multiple routes to the same destination exist, the least used route is selected. A wildcard routing entry is specified with a zero destination address value. Wildcard routes are used only when the system fails to find a route to the destination host and network. The combination of wildcard routes and routing redirects can provide an economical mechanism for routing traffic. ERRORS
EEXIST A request was made to duplicate an existing entry. ESRCH A request was made to delete a non-existent entry. ENOBUFS Insufficient resources were available to install a new route. ENOMEM Insufficient resources were available to install a new route. ENETUNREACH The gateway is not directly reachable. For example, it does not match the destination/subnet on any of the network interfaces. FILES
/dev/ip IP device driver SEE ALSO
route(1M), ioctl(2), route(7P) SunOS 5.10 9 Nov 1999 routing(7P)

Featured Tech Videos

All times are GMT -4. The time now is 02:53 AM.
Unix & Linux Forums Content Copyright 1993-2020. All Rights Reserved.
Privacy Policy