Linux Networking

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The variety of Linux distributions creates myriad issues relating to configuration and operations when computers are networked, not the least of which is the use of various network management applications, some of which are included with specific distributions, while others are standalone applications.

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hi

on the unix box various users like xyz, abc etc.

Looks like disk space is running out of server and i need to cleanup.

How to know how much user xyz occupying size and how much abc user is occupying size. please advise
0
Simple, centralized multimedia control
Simple, centralized multimedia control

Watch and learn to see how ATEN provided an easy and effective way for three jointly-owned pubs to control the 60 televisions located across their three venues utilizing the ATEN Control System, Modular Matrix Switch and HDBaseT extenders.

Hello
Im trying to configure ISC DHCP to work with Microsoft DNS. The following dhcpd.conf file creates the Forward Lookup Zone entry but it doesnt create the Reverse Lookup Zone entry.  Im pretty sure it is possible but Im stuck.  The entry is I believe being created via the device, not by the dhcp server.  I checked the dns entry and it has the hostname$ with modify perms.

Any help is appreciated.  Thanks!

dhcpd.conf - primary
#authoritative;
ddns-updates on;
ddns-update-style interim;
ddns-domainname "example.com.";
ddns-rev-domainname "in-addr.arpa.";
allow client-updates;
one-lease-per-client true;
omapi-port 7911;

#Failover specific configurations
failover peer "dhcp-partner" {
  primary;
  address server1.paychex.com;
  port 647;
  peer address server2.paychex.com;
  peer port 647;
  max-response-delay 60;
  max-unacked-updates 10;
  mclt 3600;
  split 255;
  load balance max seconds 3;
}

include "/etc/dhcp/master.conf";

Open in new window


dhcpd.conf - secondary
#authoritative;
ddns-updates on;
ddns-update-style interim;
ddns-domainname "example.com.";
ddns-rev-domainname "in-addr.arpa.";
allow client-updates;
one-lease-per-client true;
omapi-port 7911;

#Failover specific configurations
failover peer "dhcp-partner" {
  secondary;
  address server2.paychex.com;
  port 647;
  peer address server1.paychex.com;
  peer port 647;
  max-response-delay 60;
  max-unacked-updates 10;
  load balance max seconds 3;
}

include "/etc/dhcp/master.conf";

Open in new window


master.conf

Open in new window

0
In Windows there is a checkbox "Register this connection's addresses in DNS".  See attached screenshot.
What is the equivalent in
- Ubuntu Workstation
- Raspian (Raspberry Pi Debian variant)

Thank you
0
I want to search on below error
java.io.FileNotFoundException:

I want to search on all the weblogic domian directory files and its sub directory files and sub sub directory files?
how to search all the way to great great grad child level?

please advise
0
I have a vanguard calamp cellular modem with serivce from verizon and a static WAN address. Attached to it is a controller board running Busy Box v1.22.1.  I am having issues configuring port forwarding of the modem to connect to the busy box device over ssh so i can run diagnostics. does anyone have any experience with something like this?
0
OS : Linux

Let us suppose - we have 2 directories,
path1 : /prod/dir01/dir02       path2: /dev/dir01/dir01

If I refer  path1,  that should automatically should take it to path2.
Can it is possible to make it work in Linux ?

please advise.
0
Im looking for some help or recommendation on how I can monitor ISC DHCP more closely.  

  • Id like to know when a scope is close to being fully utilized -- 85-90%?
  Threshold of scope - run out of IPs
   /var/lib/dhcpd/dhcpd.leases
  • dhcp.service stops
  • dhcp failover occurred.


report a WARNING when the Secondary DHCP server kicks in (starts serving addresses due to an issue with the Primary)
report a CRITICAL when both the Primary and Secondary aren't active

Monitoring the dhcpd process running/stopped is unfortunately not really a good solution

Thanks!
0
Hi,
I looged in as xyz user and trying to delete a file in the server domian directory which was created by user say John. how to psuedo to john and delete that file.

what is unix psuedo commandd and how it wrks in unix world. please advise
0
i am in particular folder say abc.

I did ls -ltr where there are bunch of files.

i want to search all the files starting with file name xyz alone ignoring other starting with pqr etc(ignore pqr000.log.20170806.gz etc).
My search should result like

xyz123.log.20170806.gz
xyz456.log.20170806.gz
xyz789.log.20170806.gz etc



What is the command i have to use for that.

is it grep or find or something else.

when i gave grep xyz.* it did not gave any result.

how searching inside a file content is different from search outside on unix file names.

any good link on these commands? please advise
0
when i cannot stop weblogic server my friend gave below commands



ps -ef | grep ggg3rrr

what above command gives as result?
kill -9 43856
what is -9 and what is 43856 in above kill command.

please advise
0
Free Tool: ZipGrep
LVL 9
Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

can anybody tell us which is the best free tool / how to configure transparent squid with AD authentication on Linux
0
thanks !
0
hi,

How to expand putty to full screen?

also i hae 20 server instances configured  named connection1, connection2 etc till connection20


when i connect it should say connection1 at the top than meaningless ip address etc at the top  of putty window. can i configure somewhere to do that?

also how to change text and background colors. please advise
0
what is difference between below commands


$ cd xyz

it says no such file or directory

even
$ cd /xyz
says no such file or directory

where as when i say

$ cd /xyz/
it goes to xyz directory though

what is use or importance of /  and / at the beginning and end?

please advise
0
Hello!
      

Ubuntu 14.04 Desktop I usually connect to Internet via PPPoE over Wi-Fi signal from my router. The router gets the Internet from Ethernet cable which comes from my ISP into my apartment. So it's not a regular Wi-Fi Internet, WLAN just connects my computer to WIRED PPPoE I get from the ISP. Sometimes what happens is that Internet stops working and wireless signal in Ubuntu keeps disconnecting and then reconnecting by itself. And pppoeconf command can't finf PPPoE over wlan0. Then I have to connect the cable directly to my computer's RJ-45 and re-do pppoeconf and then it finds PPPoE over eth0 and then I get Internet. The problem is that for some strange reason, it works better when I use the former option, i.e. connect the cable to the router and use the wireless signal to connect to the PC. I just don't know how to fix this issue with my Wi-Fi.
0
Hello, I'm curious, hence I ask you; Is there such a "recent college engineer", either software or hardware, or one that studied both, who would meet all of these requirements:
embedded Linux based data telecommunications system/ VoIP/SIP
satellite network application and
embedded software/ Firmware/embedded systems
automation scripting
Python
Java
Linux operating system/Linux Network expertise
Unix shell scripting
WEB GUI test automation
DO-178B experience
Satellite communication experience
Telecommunication experience/PBX switching systems

Any comments?
Do companies expect to find an "expert" engineer with all this knowledge?
thanks
0
# systemctl start dhcpd
Job for dhcpd.service failed because the control process exited with error code. Se e "systemctl status dhcpd.service" and "journalctl -xe" for details.
0
Hi experts

Require script to capture all root logins, through su - or direct login with root.


OS - CentOS 7
0
Hi,

In putty vi editor vi unix how to see later pages and change colors for bettwer view.

i open big property file not able to see what is at bottom.

how to search in vi editor for some text sat xyz.

setting i went i changed colors , font etc not reflecting.

what is best setting to give for better view

when i opened
abc.properties in vi
it says 536L, 28390C
what is L what is C
how to know how many lines there how many it is showing etc
can i use winscp free version for production servers viewing property files?
please advise
0
Free Tool: Path Explorer
LVL 9
Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Hi,

I am fed up with putty with basic options.

Any better tools or IDEs to check logs or to grep unix/linux boxes.

Where  i can download secure ftp and how much is fees?
any advanced putty IDE there
any good free IDE accepted by industry.

please advise
0
Hi,
In my server i have two nics, eth0 that's a dedicated interface and eth1 that's has configured as trunk on my vmware.
In eth1 I need to create multiple vlan's, i was able to do it but I cant redirect the traffics between each vlan.
Eg:
eth1.96
ip: 192.168.3.2/24
The gateway of this vlan is 192.168.3.1
When I do ping -I 192.168.3.2 192.168.3.1 return unreachable network, seams that miss some rute.
Best regards
0
Dear Experts,

How to copy or transfer a file from one Linux server to multiple Linux server in same network from a single cmd or script ? It should be a single line cmd for copy my file to multipal servers, don't want to use separate line for every server.

for example:
scp report_zonal 192.168.7.111 192.168.7.112 192.168.7.113 192.168.7.114:/home/Zonal/Desktop

i dont know it is possible or any other way to make it possible, please suggest

Currently i am using this method, it is working also, but i don't want to use this process.

[root@200 ftp]# cat FileTransfer.sh
#!/bin/bash
# transfer file to server
cd /root/
#DC Zonal
scp report_zonal 192.168.7.111:/home/Zonal/Desktop
scp report_zonal 192.168.7.112:/home/Zonal/Desktop
scp report_zonal 192.168.7.113:/home/Zonal/Desktop
scp report_zonal 192.168.7.114:/home/Zonal/Desktop
0
what the heck is delta rpm and why use it , cant I just update or upgrade with yum update or something like that ?

thanks
0
Hi All!!

Is it possible to isolate a small linux box computer from the rest of my home network but still have internet capabilities. My home network connects to a single router which has various devices connected to it, such as Windows machines and other devices (not many but some).

The ideas is, if the linux PC or other devices are compromised, it will not affect the others. I would also like to to port-forward the linux box for remote use. So by isolating it from the network i can minimise the risks if any.

I understand that the likelihood of Linux devices infecting Windows (or vice versa) is rare but I'd still like to achieve this.

After doing research, i have come up with the below...

  • Installing/Configuring A/V on the Linux Terminal
  • Using IPtables to restrict other devices accessing. - Complete newbie to this but would appreciate some guidance.
  • Different IP Subnets.

I would very much appreciate it if someone would be able to assist me in understanding and designing a solution.

Thank you!!
0
I have a Asus RT-N18U router. (but can buy another one), with DD-WRT firmware DD-WRT v3.0-r32170 std (06/01/17)
I want:
Hotspot for Restaurants that:
-People connect (no password) to WIFI
-they get a webpage (can be on router or in internet)
-webpage ask for emailadress
-once introduced emailadress and send it (to a server in internet with its MAC address) they get granted lets say 2 hours of internet
-after 2 hours they have to come back to the login page again (or better they get blocked for 10 hours with error webpage and after to login page again)
-no other service (not free and not payed) should be used

-the router mentioned offers dd-wrt with onboard radiusserver (I tried it and works), chillispot or nocatsplash (both I didn't get to work)
The router should be configured (WAN) as DHCP automatic conection and he should use his own network with his own DHCP server (so it is easy to connect him to an existing network)

I need somebody who configures the router and tell me how the configuration works. (where are modifyable files)
0

Linux Networking

17K

Solutions

14K

Contributors

The variety of Linux distributions creates myriad issues relating to configuration and operations when computers are networked, not the least of which is the use of various network management applications, some of which are included with specific distributions, while others are standalone applications.

Top Experts In
Linux Networking
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