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failed ssh logins DOS: pam_systemd Failed to connect to system bus

After a couple of weeks of script kiddies attempting to login via SSH to my CentOS 7 box on EC2, it eventually stops responding on that port (and to http on port 80), and I have to reboot it. The ...
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1answer
62 views

bash script doesn't run properly in crontab but runs fine manually

I wrote a small script to determine the average IOPs per hour in which I later manually convert to a graph and spreadsheet for management to discuss a potential SAN upgrade for an upcoming expansion ...
2
votes
3answers
2k views

How can I get the git-all meta package on RHEL 6.2

I believe I'm missing some of the common git addons, such as gitk, and I suspect it is because I installed git using sudo yum install git as the information for that package lists: : The ...
2
votes
1answer
47 views

How to log administrator activities in Red Hat Enterprise? [closed]

Is it better to use auditd or sudo logs to log root and other user activities on a Red hat enterprise machine?
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0answers
54 views

Can't connect to Windows Server 2012 Virtual Machine in Red Hat 6

I have installed a WS2012R2 virtual machine using KVM on Red Hat, It has a bridge connection, Both (Host and Guest) have public IP addresses, both have internet access, both can ping any ip address or ...
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0answers
35 views

Is there any way to run cloud-init on a Redhat 5 instance in AWS?

Redhat 6 includes cloud-init hooks, which means in AWS you can install cfn-init and use CloudFormation. Redhat 5 doesn't appear to have cloud-init. Is there any way to get this working?
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0answers
201 views

rpm dependency failed to install, package installed anyway

I have this issue and I would like to understand why it is like this. I have build 3 really simple rpm packages called a, b and c, and I made a independant, b depending on a and c depending on a and ...
0
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2answers
105 views

How can I set resource stickiness in pacemaker?

I'm playing around with Red Hat's High Availability Add-On, everything seems working fine however I have one issue: Whenever I reboot one of nodes 7test2, resource group g1 migrates to 7test1 (by ...
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votes
1answer
20 views

Concurrent connections per IP

I need to make a few changes to a firewall configuration, but before I do I'd like to see the number of concurrent Apache connections per IP. This command produces a nice list: #netstat -ntu | awk ...
1
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2answers
553 views

Hotplug area too small error

I have VM running under RHEL6, which is running under HyperV. It has a lot of important soft installed, but does not have suffocating workload (~10% CPU is used). It's been really unstable recently ...
5
votes
1answer
119 views

Active Directory: Server 2008 and RHEL 5.10

Apologies if this is a re-post. I've been googling and researching the topic for over three weeks now and I've come up against the same problem over and over again and I haven't managed to get around ...
0
votes
1answer
1k views

Fail2ban won't start via /etc/init.d/fail2ban but will via /usr/bin/fail2ban-client

I've been running fail2ban successfully for a long time on RHEL. Now all of a sudden starting, stopping and restarting via /etc/init.d/fail2ban no longer works: # /etc/init.d/fail2ban start Starting ...
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1answer
3k views

ptp time synchronization on centos6/rhel

I need to setup time synchronization using PTP (precision time protocol). I'll get server address. I found ptpd server (version 2.1). I created startup files in /etc/init.d. But wondering what options ...
0
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1answer
128 views

Yum Cache Service

I have a LAN where I currently use an instance of Sonatype Nexus to proxy several yum repositories. All the clients on the LAN are configured to install packages only from this service. The only ...
0
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0answers
14 views

How to authenticate RHEL 6.6 to Windows Server 2012 Active Directory and LDAP? [duplicate]

Need help with setting up LDAP on Windows Server 2012 R2, I have AD setup already, but not sure what all I need to do to get LDAP running. Then I can't find any good resources online to authenticate ...
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1answer
44 views

amazon ec2 linux redhat server install unar package

I'm just trying to install unar package for the purpose of uncompress compressed files. What I've tried is sudo yum install unar But it shows "No package unar available". I googled and downloaded ...
1
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0answers
23 views

Clarify directory quota and volume quota on RedHat

I'm following this guide: Managing Disk Quota But I really don't understand how to enable quota for every sub-directory inside a directory, when the containing directory doesn't have any limit. For ...
3
votes
3answers
11k views

How to change Linux services startup/boot order?

As the question is clear from the title, how do I change Linux services startup/boot order?
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1answer
147 views

Apache process hang and 100% CPU usage

I have strange problem with Apache (MPM Prefork) and mod_php. Server is running for some time and after random time few process is hang and using 100% CPU. 1741 fileu 20 0 840m 65m 41m R 100.0 ...
0
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1answer
247 views

RHEL boot partition size during auto-installation

We are installing some servers with same RHEL image. During the installation, all but one, have had no problems with a 250MB boot partition. The one server, after the installation has received boot ...
3
votes
1answer
124 views

Increase tmpfs size more than available RAM Is that a good option?

Is it advisable to increase the size of tmpfs /dev/shm more than available RAM. Will it crash the machine? The reason for the excercise is to optimize the perfromance of the SAP application. ...
9
votes
1answer
736 views

Redhat 7 desktop to workstation

I installed a RedHat out of an installation cd, registered my entitlements, all that stuff. As part of my subscriptions I have both Red Hat Enterprise Linux Workstation and Red Hat Enterprise Linux ...
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2answers
296 views

Red Hat installation on HP ProLiant does not detect hard drive

I have an HP ProLiant BL460C Gen8 having real hardware RAID. I am trying to install Red Hat Enterprise x86_64 bit on an HP ProLiant (iLO 4) server with an Array of 2 hard drives configured as RAID1. ...
1
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1answer
28 views

Proper way to start application servers

I'm not a server admin by any means...but run a few small apps and need to learn how things should work... I start all my stuff manually; mostly rails with puma/thin. When I reboot, I need to start ...
3
votes
2answers
172 views

Upgrade a legacy, expired RHEL 3.4.6 server to modern CentOS/Scientific Linux

I have a machine running a legacy J2EE application. The code is not Maven-ized and it works with pretty old Java and Postgres versions. I have converted it to a VM in ESXI and I'd like to try to ...
7
votes
4answers
26k views

In CentOS 6.x, how can I upgrade to Kernel 3.4?

I have a server running CentOS 6.2 with kernel version 2.6.32, but I need to increase my application Performance. The Kernel Version 3.4 has x32abi which can improve the performance so i want to ...
1
vote
4answers
416 views

What server linux distros “guarantee” you will always be able to upgrade to major new releases? [duplicate]

To my astonishment, I found out I can't upgrade my CentOS 5.5 system to CentOS 6... (well I can, with a risky and painful process that is not supported and will most probably result in a mess) So, ...
71
votes
5answers
136k views

What version of RHEL am I using?

From the shell and without root privileges, how can I determine what Red Hat Enterprise Linux version I'm running? Ideally, I'd like to get both the major and minor release version, for example RHEL ...
5
votes
2answers
461 views

CentOS 6 in production

All of my virtual servers are on Centos 5.5. Now I am deploying new one and there is a new OS option: CentOS 6. I like new software, and I prefer to use new versions (but not the edge). So, as far as ...
0
votes
2answers
374 views

Trace Command on RL5

Anyone got a idea how to install the trace command on RHEL5 to monitor variable access? I already googled it and search via yum but nothing seems to work.
1
vote
1answer
67 views

How do I get firewalld to restrict access to all except specified IP addresses?

I would appreciate some assistance with configuring firewalld please. Here's a bit of background. All I want to do is prevent all access- except whitelisted IP addresses to a web application running ...
1
vote
2answers
3k views

Install Tomcat7 on EC2

I'm trying to install Tomcat7 on an Amazon EC2 instance, but it doesn't work. Below is the console output: [ec2-user@ip-XXX ~]$ sudo yum install tomcat7 Loaded plugins: amazon-id, rhui-lb, security ...
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0answers
33 views

How to add a certificate authority (CA) to redhat 5.6

I have Imported a Trusted Root Certification Authority(CA.cer) into Windows,It's working fine on window.Same certificate how to import the redhat 5.6?
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2answers
5k views

Sub-interface already in use on another host - brand new interface

I created a sub-interface on a RHEL box, eth0:1, and copied the eth0 config and changed all the settings to reflect eth0:1 and the IP address. However, when I issue ifup eth0:1 I receive this error: ...
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0answers
46 views

yum list available - not showing all packages

I have a strange problem with yum, working on one server and not working on another server that should be identical. The symptom is that after running createrepo on a directory containing RPMs (and ...
0
votes
2answers
576 views

Red Hat Clustering Fencing fails

I'm trying to demo (and learn) a Red Hat Cluster on ESXi 3.5 update2.I've set a shared fencing device with the info for my ESXi server. I try fencing a node from Luci, but it only tells me that ...
1
vote
1answer
520 views

RedHat 6 Cluster Failover

I'm testing the RedHat Cluster Administration tool documented here: https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Cluster_Administration/index.html I have two ...
1
vote
1answer
210 views

How can I run a CentOS (Red Hat) cluster in degraded mode?

I've installed Red Hat's cluster software on an install of CentOS 6.5, and use it to provide redundant routing from one network to another. This works fine, and I have a pair of boxes providing the ...
2
votes
2answers
1k views

Why has Red Hat Cluster Suite stopped working?

I've been testing the Cluster Suite on CentOS 6.4, and had it working fine, but I noticed today [8th August, when this question was originally asked] that it's not liking the config that was ...
1
vote
1answer
61 views

Why my date command changed and how to restore the default one?

I'm having a problem in a RHEL 5.3 after I tried installing Perl Power Tools. Everything was working fine until I tried installing that package by hand (the server has no access to internet). At ...
0
votes
0answers
112 views

RedHat 6.6, Apache 2.2.15 and Varnish 4.0.3: Status Code 403 Forbidden on HTTPS/SSL configuration

I'm trying to configure Varnish to work with my SSL Apache configuration. Here's an extract of my httpd.conf file: Listen 8080 ExtendedStatus On NameVirtualHost 192.168.xxx.123:8080 Then I have ...
0
votes
1answer
70 views

HW Raid controller error

On one of my old servers when i was randomly checking for system messages /var/log/messages in this Redhat case. I came across this message Mar 9 12:11:46 app-prod kernel: 3w-9xxx: scsi0: ERROR: ...
9
votes
2answers
21k views

How do I authenticate with LDAP via the command line?

The LDAP server is hosted on Solaris. The client is CentOS. OpenLDAP/NSLCD/SSH authentication via LDAP work fine, but I am not able to use the ldapsearch commands to debug LDAP issues. [root@tst-01 ...
2
votes
2answers
67 views

How to disable yum repositories not managed by puppet

Trying to bring a very ad-hoc environment into a more standardized and managed state. In my use-case, I'd like to disable all non-Red Hat repositories (provided by the subscription-manager plugin). ...
4
votes
4answers
741 views

How do I Control the Ordering of Network Interfaces?

I'm attempting to configure a machine with 3 NICs, the first two are built-in GbE controllers, the third is a 10GbE controller. Via NetworkManager, I've configured the 'first' GbE NIC (which at the ...
1
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0answers
63 views

Cannot install mysql server - Error in PREIN scriptlet in rpm package mysql55-mysql-server-5.5.32-3.el5.x86_64

I am trying to install mysql server 5.5 (or any 5.x versions) on Redhat 5.5 and am having some trouble. I can install the other mysql components but when I try to install mysql-server (or ...
1
vote
1answer
69 views

Server registered via RHSM to a Satellite Server can't load any of its assigned repositorys

One of my Redhat servers can't see any repositorys after registering with our Satellite server. I do have to say this Satellite server is newly setup and the newest Version -> Satellite Server 6 on ...
1
vote
4answers
177 views

How do I check if my VPS participated in a brute force or denial of service attack? [closed]

On VPS what logs do I have check and what type of information should I check for to find out if my server participated in a brute force or denial of service attack? I have the targeted IP address ...
0
votes
0answers
61 views

Can't read PID file on OpenLdap using RedHat 6/ Centos

When I try to execute command "service slapd debug", I receive this message [root@elara ~]# service slapd debug slapd: [INFO] Using /etc/default/slapd for configuration slapd: [INFO] Halting ...
1
vote
2answers
71 views

AWS fails to resize an RHEL64 instance upon launch

I'm using AWS to boot up a RHEL64 instance but the disk is failing to resize to fit the volume I've selected. Here's the scenario: I Launch a running instance from the Marketplace AMI ami-517eec6b ...