/etc/hosts is the configuration file with locally known mappings between domain name and ip address.

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73
votes
6answers
29k views

Can I create a user-specific hosts file to complement /etc/hosts?

Is it possible to add a list of hosts that are only specific to a certain user? Perhaps a user-specific hosts file? This mechanism should also complement the entries in the /etc/hosts file.
11
votes
1answer
7k views

How can I override the /etc/hosts file at user level? [duplicate]

Possible Duplicate: Can I create a user-specific hosts file to complement /etc/hosts? In short: I would like to know if it is possible to get a ~/hosts file that could override the ...
11
votes
2answers
1k views

practical usage of /etc/networks file

What is the practical usage of /etc/networks file? As I understand, one can give names to networks in this file. For example: root@fw-test:~# cat /etc/networks default 0.0.0.0 loopback ...
10
votes
2answers
1k views

Two different /etc/hosts depending upon the time

I am trying to make a productivity suite for myself. My first goal is to block Facebook, Gmail and Stackexchange from 0900 to 1600. As of now, I have edited my /etc/hosts and added 0.0.0.0 ...
10
votes
5answers
3k views

Host lookup that respects /etc/hosts

Utilities like host and dig let you see the IP address corresponding to the host name. There is also the getent utility that can be used to query /etc/hosts or other NSS databases. I am looking for ...
10
votes
2answers
9k views

/etc/hosts file refer to another configuration file

How can I get the /etc/hosts file to refer to another configuration file for it's list of hosts? Example /etc/hosts: ## My Hosts 127.0.0.1 localhost 255.255.255.255 broadcasthost #Other ...
10
votes
1answer
6k views

Wildcard in /etc/hosts file

It seems that wildcards are not supported in the /etc/hosts file. What is the best solution for me to resolve all *.local domains to localhost?
9
votes
1answer
1k views

Why does SSH not consult /etc/hosts?

I'm administrating a networked environment where the users authenticate over NIS. All machines can be used to SSH into the server but one. On the machine in question, I get the message ssh: connect ...
7
votes
2answers
2k views

How to test /etc/hosts

What's the best way to confirm that your /etc/hosts file is mapping a hostname to the correct IP address? Using a tool like dig queries an external DNS directly, bypassing the hosts file.
7
votes
2answers
10k views

Hosts file: Is it incorrect to have the same IP address on multiple lines?

For a while I have been formatting my hosts file like this. Notice the same ip on two lines: e.f.g.e foo.mydevsite.com e.f.g.e foo.myOtherDevSite.com I read recently that aliases are supposed to ...
6
votes
3answers
25k views

Format of /etc/hosts on Linux (different from Windows?)

Pasted below this question is a sample of a /etc/hosts file from a Linux (CentOS) and a Windows machine. The Linux file has two tabbed entries after the IP address (that is localhost.localdomain ...
6
votes
2answers
455 views

What is the reliable way of getting each user's .ssh directory from bash?

I can parse the /etc/passwd with augtool: myuser=bob usershome=`augtool -L -A --transform "Passwd incl /etc/passwd" print "/files/etc/passwd/$myuser/home" | sed -En 's/\/.* = (.*)/\1/p'` ...but it ...
6
votes
2answers
11k views

Creating alias to domain name with /etc/hosts

I have a domain setup to point to my LAN's external IP using dynamic DNS, because my external IP address changes frequently. However, I want to create an alias to this host, so I can access it with ...
5
votes
4answers
4k views

Maintaining `/etc/hosts` for hosts on DHCP

On my local DHCP network I have different PC's that I need to access remotely. Problem is that their IP's change. Sometimes I plug my laptop and netbook into other people's DHCP networks. My current ...
4
votes
2answers
226 views

How to make my server use the hosts file to resolve names?

I have a computer with Debian at home, acting as a server with two Ethernet cards: eth0 connected to the router in DHCP mode and eth1 to a switch (static address) that holds four more computers. I'm ...
4
votes
3answers
2k views

How does /etc/hosts match work?

I'm curious about how /etc/hosts entries match works in Linux vs others *nix platform (if there is any difference). In particular I would be interested to understand if "match time" is proportional ...
4
votes
1answer
188 views

Alternative to DNS for internal servers

I am setting up my first network at work. All the servers are running CentOS 6.3 and have statically assigned IP addresses. For example: server1 192.168.0.101 server2 192.168.0.102 I want to be ...
4
votes
1answer
32 views

Hostaliases file with an IP address

The HOSTALIASES environment variable allows users to set their own host aliases instead of having to sudoedit /etc/hosts (more details, e.g., at http://blog.tremily.us/posts/HOSTALIASES/) However, ...
4
votes
1answer
6k views

Postfix email bounced (mail for domain loops back to myself)

I have problem when i send a mail to example@orbialia.es for example2@orbialia.es My emails has bounced for this error: status=bounced (mail for orbialia.es loops back to myself) May 9 09:33:58 ...
3
votes
3answers
3k views

/usr/bin/host not picking up changes to /etc/hosts even after reboot

I have a Ubuntu Server 12.04 (amd64) machine on which, when I change /etc/hosts, the changes aren't picked up, even after a reboot. I am using /usr/bin/host to test, but none of the other programs ...
3
votes
3answers
3k views

/etc/hosts file syntax. Is it possible to set one IP for a zone?

I would like to set one IP for a zone (livejournal.com) currently I am having to directly type the subdomains like: 11.11.11.11 sub1.livejournal.com 11.11.11.11 sub2.livejournal.com 11.11.11.11 ...
3
votes
2answers
17k views

How can I configure /etc/hosts file to point to apache web server?

I have installed apache web server and I need to point 127.1.1.1 with alias (www.someaddress.lan) to local apache. What is the proper way to do it? How to point someaddress.lan to default apache page ...
3
votes
2answers
20k views

/etc/hosts for Debian

I was trying to get a perl script that contacts a PostgreSQL database to work on a server. This script was mysteriously failing. I then realised that localhost was not in the /etc/hosts file. The ...
3
votes
1answer
318 views

tcpdump command works only on local ip

I am trying to capture some IP packets in my personal LAN with tcpdump, through the command tcpdump -A -i eth0 'tcp and (((ip[2:2] - ((ip[0]&0xf)<<2)) - ((tcp[12]&0xf0)>>2)) != 0) ...
3
votes
1answer
794 views

ignore hosts file in ZSH ssh/scp tab-complete

I use a hosts file to block ads/malware domains. When I use ssh or scp in zsh and try to tab-complete, it takes a good 5-10 seconds before anything appears and what does appear is usually a list of ...
3
votes
1answer
4k views

Using /etc/hosts or iptables to redirect site to https:// version

I'd like to have my system automatically take me to https://facebook.com even if I put http://facebook.com into my browser. I can get /etc/hosts to redirect to me to different domains, but it seems ...
3
votes
2answers
100 views

Should /etc/hosts contain the domain name or the FQDN?

If I want to add an entry to /etc/hosts to resolve all traffic for example.com to 1.2.3.4, do I need to add 1.2.3.4 example.com 1.2.3.4 www.example.com 1.2.3.4 smtp.example.com 1.2.3.4 ...
3
votes
2answers
889 views

allow only specific users to login via sshd, but refuse connect to non-listed users

I'm running a CentOS server (7.0) and I'd like to login via sshd as a user, not root. So I set PermitRootLogin no in the config file and su - after login. I've received lots of hacking activities and ...
3
votes
1answer
106 views

date format in /etc/hosts.allow

I have following line in my /etc/hosts.allow sshd: 1.2.3.4 : spawn (echo `date` ALLOWED from %a >> /var/log/%d.log) & The problem is, the date command prints time in the standard format, ...
3
votes
1answer
237 views

why are there different formats for the hosts file between OpenSuSE and Ubuntu?

How is 127.0.0.1 related to 127.0.0.2? Using ssh to login to tleilax (OpenSuSE): tleilax:~ # tleilax:~ # hostname tleilax tleilax:~ # tleilax:~ # hostname -f tleilax.bounceme.net tleilax:~ # ...
3
votes
1answer
2k views

Blocking Websites with /etc/hosts

There's a website, www.example.com, that I tried to block myself from accessing because it wastes too much of my time. So I configured my /etc/hosts file. I added the following lines, to block the ...
3
votes
2answers
1k views

Wget - Mirroring a full website with requisites on differents hosts

I am trying to make a full static copy of a wordpress website with wget to be browsed without any network connection (all links and images must be converted). The different requisites for the pages ...
3
votes
2answers
690 views

Local DNS rewrite from host to host for web requests

Is there some de-facto way for rewriting certain hostnames to other ones? Something like /etc/hosts for host to host instead of ip to host. Is this possible or should I create a local dns cname for ...
3
votes
1answer
64 views

What application can I use to block hosts with regex?

Is there any tool/application that I can use to block hosts from all forms of connection from my computer? Currently I use /etc/hosts and place the absolute host like this: 127.0.0.1 ...
2
votes
2answers
3k views

Ping multiple hosts and execute command

I'm very new in bash scripting and unix so I will need some help on this.I have 7-10 hosts which I want to ping from one of the servers via cronjobs. What I want is when host is up to execute command ...
2
votes
4answers
5k views

Hosts file modification not used

I added an entry to my hosts file for the development of a website. I put a new line in /etc/hosts xx.xx.xx.xx www.mysite.com But even after a reboot when I use chrome or firefox the host name is ...
2
votes
1answer
2k views

Hosts file on server with dynamic DNS?

I am setting up a RHEL-based server that is associated with dynamic DNS from DynDNS, with a domain of, say, "abc.dyndns.org" that is dynamically updated with the server's IP address. I have read that ...
2
votes
2answers
190 views

Understanding hostnames

I was recently setting up an MTA on a VPS, and while configuring it I realized I’m quite confused about the concept and implementation of hostnames in Unix. I have a solid understanding of the DNS, ...
2
votes
1answer
255 views

rhosts changes and re-initializing

I'm having trouble using the r-commands between my servers to do a tape backup. I've been making changes in the .rhosts file, but I'm not sure if the OS reads that file everytime it's called, or just ...
2
votes
1answer
2k views

Static IP address shifting to 192.168.1.251

I have a system with a static IP address of 192.168.1.150. I configured /etc/network/interfaces manually (i.e. without using NetworkManager.) It is a web server hosting three sites. I am having ...
2
votes
1answer
1k views

/etc/hosts in debian resets itself on reboot

I've been having a problem where when our vps provider decides to restart the server (running Debian 5.0.8), the server fails to remember changes to /etc/hosts. All I need is an database alias that ...
2
votes
1answer
330 views

Sed to Modfiy Hosts File

I have a text file, modifyhostslist.txt, which contains entries that correspond to entries found in my hosts file. Not every entry in my hosts file needs to be modified, only entries also found in ...
2
votes
0answers
34 views

Absolute domain names in /etc/hosts?

I have a RHEL7.0 host which has this standard entry in /etc/hosts/: 127.0.0.1 localhost.localdomain localhost So resolving localhost.localdomain works: $ ping localhost.localdomain PING ...
2
votes
0answers
333 views

DNS works half of the time in Oracle VirtualBox and I can't even maintain /etc/hosts file

I have installed three Linuxes on same laptop and same VirtualBox and this is my success ratio with DNS: HortonWorks & CentOS. Worked for 5 minutes and never after that again. VM image ...
2
votes
0answers
336 views

Why is my /etc/hosts.deny file being ignored?

I am using a small embedded linux setup generated by buildroot to run on a x86 device. It was generated to use busybox init system and also runs dropbear so I can ssh into the device. I wanted to ...
2
votes
0answers
190 views

why is FQDN using external IP address

When postfix connects to the FQDN dur.bounceme.net it uses the external IP address: root@dur:~# root@dur:~# tail /var/log/mail.log Aug 28 04:39:45 dur postfix/master[6667]: terminating on signal 15 ...
1
vote
2answers
21 views

Adding recursive entries into `/etc/hosts`

I'd like to add shorthands for various FQDNs into the /etc/hosts file, such as: pyrrha.compsci.university.org. pyrrha Is there a way to force the local DNS resolver to process the /etc/hosts ...
1
vote
2answers
831 views

How to change the name of localhost to a custom name which is available to other users in LAN

I need to use the a custom URL name which is accessible from all devices in a LAN. I know that it can be set in the /etc/hosts file 127.0.0.1 myname 127.0.1.1 system09-System-Product-Name # The ...
1
vote
2answers
2k views

How to edit /etc/hosts without sudo?

I have a machine that I can only access using SSH. I was messing with the hostnames, and now it says: ssh: unable to resolve hostname I know how to fix it in /etc/hosts. Problem is, I need sudo ...
1
vote
1answer
510 views

Changing host file in Ubuntu

I tried to change /etc/hosts to change a local DNS entry, so I can map any website name to any IP, but it isn't working. How can I debug it?