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Linux Distributions

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A Linux distribution is an operating system made as a software collection based on the Linux kernel and, often, on a package management system and are available for a variety of systems. A typical Linux distribution comprises a Linux kernel, GNU tools and libraries, additional software, documentation, a window system (the most common being the X Window System), a window manager, and a desktop environment. Most Linux systems are open-source software made available both as compiled binaries and in source code form, allowing modifications to the original software. Over three hundred distributions are in active development, including commercially backed distributions (such as Fedora, openSUSE and Ubuntu) and community-driven distributions (such as Debian, Slackware, Gentoo and Arch Linux).

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Can i able to add RHEL6 and RHEL7 repos to spacewalk?

I have account on redhat where i can download all the rhel6/7 packages.  not sure how to add to spacewalk so i can utilize spacewalk to do lot of operations.
0
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--> Finished Dependency Resolution
Error: Package: spacewalk-taskomatic-2.7.115-1.el7.noarch (spacewalk)
           Requires: hibernate3 >= 3.6.10
           Available: hibernate3-3.2.4-1.SP1_CP01.9.jpp5.noarch (jpackage-generic)
               hibernate3 = 3.2.4-1.SP1_CP01.9.jpp5
Error: Package: spacewalk-java-2.7.115-1.el7.noarch (spacewalk)
           Requires: tomcat-taglibs-standard
Error: Package: spacewalk-java-2.7.115-1.el7.noarch (spacewalk)
           Requires: hibernate3-ehcache >= 3.6.10
Error: Package: spacewalk-java-2.7.115-1.el7.noarch (spacewalk)
           Requires: hibernate3-c3p0 >= 3.6.10
Error: Package: cglib-2.1.3-4.jpp5.noarch (jpackage-generic)
           Requires: asm >= 1.5.3
           Available: asm-1.5.3-7.jpp5.noarch (jpackage-generic)
               asm = 1.5.3-7.jpp5
Error: Package: spacewalk-taskomatic-2.7.115-1.el7.noarch (spacewalk)
           Requires: hibernate3-c3p0 >= 3.6.10
Error: Package: spacewalk-taskomatic-2.7.115-1.el7.noarch (spacewalk)
           Requires: concurrent >= 1.3.4-21
           Available: concurrent-1.3.4-9.jpp5.noarch (jpackage-generic)
               concurrent = 1.3.4-9.jpp5
Error: Package: spacewalk-java-2.7.115-1.el7.noarch (spacewalk)
           Requires: apache-commons-el
Error: Package: spacewalk-taskomatic-2.7.115-1.el7.noarch (spacewalk)
           Requires: hibernate3-ehcache >= 3.6.10
Error: Package: spacewalk-java-2.7.115-1.el7.noarch (spacewalk)
           Requires: hibernate3 …
0
I had this question after viewing Cent OS and Zscaler pac file.

We use Zscaler proxy pac file and I have a CentOS 6.9 physical machine that needs to get updates via yum.

su
password for su
vi /etc/yum.conf


press "i" to enter insert mode and added the proxy info:

proxy = http://ZscalerIP:ZscalerPort/
proxy = http://username:password@ZscalerIP:ZscalerPort/


Once I added this saved and close press "Esc" and then ":wq" and then press Enter

Then ran:

yum - y update

And it was updating just fine.

However, since the first yum updates and reboot the machine has not been able to update via yum.

To help outline what has been done so far:

https://www.centos.org/forums/viewtopic.php?p=269626

Can someone please help me to resolve?

Thank you
0
I did register SUSE 11 SP4 to customer portal. however i don't see the system in the customer portal. but the command returned a string saying the system successfully registered.

suse_register -a regcode-sled=id -a email=admin@mydomain.com -L /root/.suse_register.log
0
Hi freiends,

I have a couple of machines (same hardware) to be set up identical with SUSE Linux Enterprise Server 12.2 and some special application software. The machines run with a RAID1 HDD configuration (mirrored disks).

After completeing the first machine, I did image backups from all partitions (with the tools fsarchiver and partclone from the latest SystemRescueCD) and restored 'em onto the next machine with the same set of tools ( ... yes, I did transfer the partition layout, too). Unfortunately that machine didn't boot up SLES afterwards.

Out of curiosity I installed a plain SLES 12.2 on the machine then and immediately did the image restore afterwards. Now that machine boots up. I presume that the SLES installer writes something into the UEFI BIOS to let the machine boot from the SLES partition.

Is there any way to circumvent that otherwise useless SLES installation step by tweaking the UEFI BIOS settings ?
Is there anything I could/should/must "clone" to the other machine (and, if yes, how) ?
0
Hi,
how to transfer
site booksmarks to shared bookmarks in winscp

please advise
0
Hi,

how to teach winscp remember password. Every time entering password is pain for me. please advise
0
good morning

I am currently presenting problems with three virtual servers, with Redhat operating system version 6.6, since it is not loading the operating system correctly and does not finish starting.

Restart the server repeatedly, migrate another host, and the fault persists. Attach pictures of the errors I am observing.

Stay tuned to your comments.

Best regards.
Errores-Linux.docx
0
I've got a cursory understanding of CentOS and Linux server administration (installing packages, inspecting error logs, etc etc)...but I don't quite understand how to manage repositories.

For example, right now I'm attempting to install an old version of PHP on to a CentOS 6 server - and there a couple of packages that YUM can't find in the default repositories.  For example I have three dependencies I'm trying to install for:

 libmcrypt-devel libmhash-devel mysql55-devel

I can see those in various places when I search on Google - apparently in different non-standard repositories...but I don't quite understand the process of including them.

Any help would be appreciated!
0
I'm having a small issue with a recently provisioned Debian 9.1 VM (from an online hosting company).

When deploying the VM I am provided with Key-Based Authentication for the machine. Those work fine (with the new "debian" super user, root not being anymore active by default) but I'd like to be able to use user / pass too (if nothing else for console access).

How do I set my password ? I tried
passwd debian

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but I am prompted for the "old" password which I don't know...

Also - even if it is not best practice - can I activate the root user ?
0
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Hello ,

I have a problem with interfaces on a multihomed topology. My interfaces can not ping each other and can not ping theirselves too
sysctl as given below.

But it is able to ping the interface ip when i directly write ping 37.123.98.142 , if the both interface are not able to ping this interface's ip how does it ping it or from where ?

I have to let them have access each other how shoud i do it ?

Note: loopback interface activated
Note2: em interfaces are all down

[root@spd network-scripts]# sysctl -p
net.ipv4.ip_forward = 1
net.ipv4.conf.p1p1.rp_filter = 2
net.ipv4.conf.p1p2.rp_filter = 2
net.ipv4.conf.all.rp_filter = 2
net.ipv4.conf.default.rp_filter = 2
net.ipv4.conf.lo.rp_filter = 2
net.ipv4.conf.p1p1.accept_local = 1
net.ipv4.conf.p1p2.accept_local = 1
net.ipv4.conf.all.accept_local = 1
net.ipv4.conf.default.accept_local = 1
net.ipv4.conf.lo.accept_local = 1
net.ipv4.conf.default.arp_filter = 0
net.ipv4.conf.all.arp_filter = 0
net.ipv4.conf.p1p2.arp_filter = 0
net.ipv4.conf.p1p1.arp_filter = 0
net.ipv4.conf.lo.arp_announce = 2
net.ipv4.conf.all.arp_announce = 2
net.ipv4.conf.default.arp_announce = 2
net.ipv4.conf.p1p1.arp_announce = 2
net.ipv4.conf.p1p2.arp_announce = 2

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PING 37.123.98.142 (37.123.98.142) from 37.123.98.142 p1p1: 56(84) bytes of data.

^C
--- 37.123.98.142 ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 2055ms

[root@spd network-scripts]# ping -I p1p1 37.123.98.138
PING 37.123.98.138 (37.123.98.138) from 37.123.98.142 p1p1: 56(84) bytes of data.

^C
--- 37.123.98.138 ping statistics ---
4 packets transmitted, 0 received, 100% packet loss, time 3064ms

[root@spd network-scripts]# ping -I p1p2 37.123.98.138
PING 37.123.98.138 (37.123.98.138) from 37.123.98.138 p1p2: 56(84) bytes of data.

^C
--- 37.123.98.138 ping statistics ---
2 packets transmitted, 0 received, 100% packet loss, time 1038ms

[root@spd network-scripts]# ping -I p1p2 37.123.98.142
PING 37.123.98.142 (37.123.98.142) from 37.123.98.138 p1p2: 56(84) bytes of data.

^C
--- 37.123.98.142 ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 2060ms

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[root@spd network-scripts]# ping 37.123.98.142
PING 37.123.98.142 (37.123.98.142) 56(84) bytes of data.
64 bytes from 37.123.98.142: icmp_seq=1 ttl=64 time=0.019 ms
64 bytes from 37.123.98.142: icmp_seq=2 ttl=64 time=0.022 ms
64 bytes from 37.123.98.142: icmp_seq=3 ttl=64 time=0.017 ms
64 bytes from 37.123.98.142: icmp_seq=4 ttl=64 time=0.015 ms

Open in new window




Open in new window

0
what is meaning of root.
why i have to go to root. what i can do from root what i cannot do from root. what i can do using my user.
how unix allows logging in as different user say John when i logged in as say xyz

any online link or free video tutorials explaining all these concepts? an how to practice please advise
0
I am using Centos 6 and Putty .67.  I need to copy the entire contents of a file that I have open and I am editing with nano or vi.  I can copy and paste what can be seen but it doesn't copy what is outside of the screen.  I have this problem on my largest screen or my laptop screen.

For example, often I want to copy some code but i can only copy what I can see and then I have to paste those contents and then go back where I left off and copy the remainder of the code and then paste those contents next to what I just pasted.

Isn't there an easier way?
0
Hello ,

Is there any possible way to drop bogus packets as seem below .

for this packets ; packet payload is smaller then the length of the packet

 Screen-Shot-2017-08-23-at-22.22.46.png
0
What are the ways to get RHEL patches ?

1. Doing 'yum' to pull down directly from RHN support
2. My Unix admin told me he could download via Tcp443 all the rpm packages
    for RHEL 7 patches (to a development server in DMZ) & then do 'yum'
    against these RPMs : is this true?
    Then he can scp/sftp these RPMs internally to other RHEL (or share out via
    NFS) servers to update patches to the other servers.
3. Set up a Satellite server : there's cost to this.  Is Satellite servers hosted in
     DMZ as a practice
4. Any other methods?

Which of the above are more secure?  We prefer not to let all servers directly
'yum' to RHN support due to security & bandwidth concerns
0
OS : Linux release 7
Recently we have installed some Oracle software on server.
This Dev server, out of total 20GB, it is taking around 10GB for swap as below.
                    total         used
Swap:          9207        9205


free -m shows presently 500 MB memory is free in OS.
Shall we go for Mem Upgrade or  Any alternate fix required to resolve this issue.

please advise
0
Hi,

I have user called xyz under that folder there is folder call test under that there is folder called abc, def, hij etc

i want to search to search in all above folders and subfolders for a particular keyword say " nullpointerexception " how t do that .
please advise
0
SIPp is a free SIP traffic generating tool for Linux.
http://sipp.sourceforge.net/

SIPp user manual says you can install SIPp under CYGWIN on windows. However I am not experienced  with compiling applications to run under Linux and need help getting SIPp up and running under CYGWIN on a windows10 machine.

I have successfully installed CGYWIN and included the following packages (all successfully)
gcc-core
gcc-g++
gcc
libncurses
make

After the CGYWIN install, I put C:/cygwin64/bin in the win10 systems’ environment variable PATH – so far all ok and CGYWIN seems to be working fine.

In addition, the SIPp install instructions state:

Warning
SIPp compiles under CYGWIN on Windows, provided that you installed IPv6 extension for CYGWIN (http://win6.jp/Cygwin/), as well as libncurses and (optionally OpenSSL and WinPcap). SCTP is not currently supported.


QUESTION 1 -  Do you know what this is???    IPv6 extension for CYGWIN http://win6.jp/Cygwin/ 
is it a CYGWIN package, and entire install version??
What/how do I need to do to check/install?

QUESTION 2 – Nothing happens when I try to run “autoreconf -ivf” ...but this might have to do with Question 1 not being addressed yet.

 /cygdrive/c/Backup/tools/SIPp/3.3
$ autoreconf -ivf
-bash: autoreconf: command not found


+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
FROM DOC


Installing SIPp
•      On Linux, SIPp is provided in the form of source code. You will need to…
0
hi,

winscp how to sudo as admin?
I currently logged in as my user say xyz but i am not able to delete particulr folder/directory. I have to login or pseudo as admin user say rrr to that. how to psedo in the winscp to rrr user?pleaseadcise
0
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Hi,

winscp how to compare 2 different unix users say xyz and abc by opening xyz on left hands side and abc on right hand side. As of now on the left hands side i was able to open my windows laptop folder structure like C drive etc and on right hands side i am able to open one unix user like abc or xyz etc. please advise
0
i'll need a Shell script that scans thru creation dates of all patches (ideally only the security ones but
if this is not possible, then all patches) installed in an RHEL 7 server, get the latest one, compute
the difference from today's date & give the difference in number of days & if the difference is
more than 90 days, echo out a message, "It has been more than 90 days since last patch)

Purpose is to check the last patch date & remind Linux admins.  Believe RHEL releases patches
at least every 3 monthly?
0
Hello ,

On cloudlinux there is an application with named cage fs that lock the users to their space like a cage. What exactly it does ? is there a way to make same thing without cage fs ?
0
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
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
Hi all

I have Exchange 2016 server as frontend and installed Linux (ubuntu 14) server as a spam gateway, I installed Spam Assassin and then Postfix and tried to configure it in order to filter and then relay mail to Exchange but I am getting the following error when testing inbound mails

Attempting to send a test email message to admin@domain.net using MX mail.domain.net.
       Delivery of the test email message failed.
       
      Additional Details
       
The server returned status code 451 - Error in processing. The server response was: 4.3.0 <admin@domain.net>: Temporary lookup failure
Exception details:
Message: Error in processing. The server response was: 4.3.0 <admin@domain.net>: Temporary lookup failure
Type: System.Net.Mail.SmtpException
Stack trace:
at System.Net.Mail.RecipientCommand.CheckResponse(SmtpStatusCode statusCode, String response)
at System.Net.Mail.RecipientCommand.Send(SmtpConnection conn, String to, String& response)
at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, Boolean allowUnicode, SmtpFailedRecipientException& exception)
at System.Net.Mail.SmtpClient.Send(MailMessage message)
at Microsoft.Exchange.Tools.ExRca.Tests.SmtpMessageTest.PerformTestReally()
Elapsed Time: 1141 ms.

My configuration is attached as a code

# See /usr/share/postfix/main.cf.dist for a commented, more complete version


# Debian specific:  Specifying a file name will cause the first
# line 

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0

Linux Distributions

26K

Solutions

20K

Contributors

A Linux distribution is an operating system made as a software collection based on the Linux kernel and, often, on a package management system and are available for a variety of systems. A typical Linux distribution comprises a Linux kernel, GNU tools and libraries, additional software, documentation, a window system (the most common being the X Window System), a window manager, and a desktop environment. Most Linux systems are open-source software made available both as compiled binaries and in source code form, allowing modifications to the original software. Over three hundred distributions are in active development, including commercially backed distributions (such as Fedora, openSUSE and Ubuntu) and community-driven distributions (such as Debian, Slackware, Gentoo and Arch Linux).