0
votes
0answers
27 views

Stuck at grub prompt after a default CentOS 6 installation

I am having a very strange problem installing CentOS 6 that I've never encountered before. I've followed these same steps thousands of times before, but within the past couple weeks I've had two ...
0
votes
2answers
37 views

Yum update problems on AWS with missing requirements and duplicate sendmail

I am running an AWS VM and tried: sudo yum update Result: Error: Protected multilib versions: sendmail-8.14.4-8.12.amzn1.x86_64 != sendmail-8.14.4-7.9.amzn1.i386 You could try using ...
0
votes
1answer
31 views

How to troubleshoot an unexpected Linux shutdown

I have two RHEL6.3 servers that just shutdown at the same exact time (25 seconds apart) for no apparent reason. They're on conditioned power, along with a number of other servers that didn't shut ...
0
votes
1answer
66 views

Number of SSH connections rises, and blocks data?

We have a client server setup, where the client sets up an SSH tunnel and uses port forwarding to send data to the server: ssh -N -L 5000:localhost:5500 user@serveraddress The normal number of SSH ...
2
votes
1answer
45 views

Assign different Hostname to different NIC

I have four network card on my server, I have assigned each with an specific IP now I want to set an different hostname for all the interface? What is the difference between setting the hostname in ...
0
votes
0answers
27 views

when and how to appropriately use /proc/sys/vm/drop_caches

You can clear page cache with /proc/sys/vm/drop_caches. Can someone provide a practical explanation of how this works, when as a sysadmin you would want to do this, how to determine if your system ...
1
vote
1answer
35 views

Under what circumstances could multiple VMs and mounted drives have corruption at the same time?

Today I had to fix 3 VMs with near identical file system errors all running Redhat 5 or 6. Basically the VMs had corrupted inodes and remounted / as a read-only file system, also corrupting several ...
0
votes
0answers
23 views

Directory Listing Denied Message

Understand that this is the common error for a missing index.* in the location being pointed to by Apache, however I know it to be the case that there is an index.php in the location specified as the ...
0
votes
1answer
60 views

Starting Tomcat 7 as a user - init.d script can't write pid

I want to run Tomcat 7 as a user on CentOS 6. I've created a user tomcat:tomcat and changed the ownership under /var/lib/apache-tomcat* etc... There are lots of docs online on how to do that but I ...
1
vote
1answer
34 views

yum install throwing error 403 when trying to install from rhel-x86_64-server-6

To preface this, I don't have much Red Hat experience. Most of my experience is with Ubuntu. The server I'm working on right now is running Red Hat Enterprise 6.5. I'm trying to do a simple yum ...
0
votes
1answer
27 views

How can I retrieve screen unlock times in gnome?

The last command only retrieves the login times. I'm interested in the times that the screen was unlocked. Any indirect means of getting this are also welcome.
4
votes
2answers
181 views

VMXNET3 performance on Linux on ESX 5.0

What kind of performance can I expect from VMXNET3 adapter when running two Linux guests on the same VMware ESX private network defined between those guests? I use VMXNET3 adapter for communicating ...
3
votes
1answer
53 views

Network card location

I am generally familiar with hpacucli and hpasmcli but how do I determine in which slot a network card is installed? I need to be able to map to and from the slot and the MAC (and from there to the ...
1
vote
1answer
20 views

Tomcat upgrade replacing ROOT.war

When upgrading tomcat by running: yum update on Amazon Linux the ROOT.war file is replaced by the default ROOT.war from the tomcat distribution. Is there a way to prevent this?
0
votes
1answer
62 views

Prevent reboot after yum update

I would like to know how to stop the system from rebooting after running a yum update. I use a script on each system which runs daily yum updates through cron and if an uodate is critical enough (for ...
2
votes
0answers
44 views

Lots and lots of kernel log entries: iint_free: readcount: -1, iint_free: writecount: 1

I am getting tons of log entries of the form Mar 2 00:44:10 SRV123 kernel: iint_free: readcount: -1 Mar 2 00:44:10 SRV123 kernel: iint_free: writecount: 1 Mar 2 00:44:10 SRV123 kernel: iint_free: ...
1
vote
3answers
107 views

How to find whats using network traffic

What tool can I use to figure out what process is using the network over a certain time frame and how much data was transferred? I can tell the data is transferred over a 5 minute period. Could be a ...
1
vote
1answer
49 views

How to make ntpd timeout when an Internet connection is not available

I am using the following command to synchronise the time on a Oracle Linux 6.5: ntpd -gq Unfortunately it does not timeout when an Internet connection is not available. Is this possible or should ...
0
votes
1answer
21 views

Is it possible to configure a Linux server to use more than one LDAP target?

We have an environment that we are tasked with managing while also giving access to projects that run the applications on the servers. Some of those projects have stood up LDAP for authenticating ...
0
votes
2answers
31 views

Oracle database installation file limits

I'm reading a oracle guide for installing a Database on redhat 6, but i don't understand why oracle recommend to set the file-max system parameter and nofile in /etc/sysctl.conf ...
3
votes
1answer
54 views

ldap_add no such object (32) matched dn dc=domain dc=com

When im trying to import users to LDAP using this command: ldapadd -x -D "cn=Manager,dc=domain,dc=com" -W -f /etc/openldap/root.ldif I have this error: ldap_add no such object (32) ...
0
votes
1answer
38 views

SMTP Fallback relay server explanation

I am using postfix on Linux redhat server, I can't understand the functionality of smtp fallback relay configured in both main.cf & master.cf Could you please advise?
0
votes
1answer
45 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 ...
0
votes
0answers
58 views

Detect Fibre Attached Tape Drive in Red Hat Linux

I am running Red Hat Linux 6.4 and I have one Fibre Attached Tape Drive which is not visible to the OS. I also have the WWPN of the tape drive. The server has two Qlogic HBA Card with two port each. ...
2
votes
0answers
97 views

ZFS on RedHat configuration

I have to set up a ZFS storage appliance (Oracle ZFS Storage ZS3-2) with NFSv4. The NFS is mounted on a Redhat 6.5 cluster, where the linux users are created (they don`t exist on the appliance). ...
0
votes
1answer
22 views

Where to download MySQL server 5.0.77-log

I have MySQL Server version: 5.0.77-log Source distribution on a RHEL6 server. I need to reinstall it on a second RHEL6 server to set up a testing environment but I cannot find where to download this ...
0
votes
1answer
49 views

How can i install mysql_config on Red Hat Linux 4?

I've been tasked with implementing a few upgrades on a Red Hat Linux 4 box that is already running MySQL. I've found the need for the mysql_config tool, but i can't locate it as already being ...
0
votes
3answers
37 views

why wget doesn't read HTTP_PROXY in uppercase format?

In unix/linux i know the eviroments variables are uppercase, like LD_LIBRARY_PATH ; HOME ; $USER and so on, today playing with wget i saw this commands just uses lowercase enviroment variables env | ...
0
votes
1answer
36 views

I have servers that keep becoming inactive in RHEL Satellite 5.3

I have lots of RHEL 5 servers subscribed to a Satellite 5.3 server (I know it's all old, not my choice). After I register servers, many of them seem to fall out and become inactive and require ...
0
votes
0answers
38 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
votes
1answer
56 views

MySQL 5.0 not logging aborted connections in general log

I know there is a bug in MySQL 5.0 which prevents aborted connections from being logged in the error log (http://bugs.mysql.com/bug.php?id=24761). However, aborted connections should still be logged ...
0
votes
0answers
45 views

Postfix/Dovecot Service

I have installed Postfix 2.10.2/Dovecot 2.2.5 on RHEL 5.9 from a source code, I forced Installation to be in my own directories not Defaults, I need to add Postfix/Dovecot under services or init.d to ...
0
votes
1answer
30 views

Do global logging settings in MySQL5 stick after service restart?

Want to execute this on MySQL 5.0: set global log_warnings = 2; Will the setting stick after a mysqld service restart?
-2
votes
1answer
48 views

Find out my distribution

I am doing some work on a Linode and I wanted to know what is the distribution that is being run, so I typed $ cat /proc/version and I got this output: Linux version 3.4.2-linode44 (root@build) ...
-2
votes
2answers
38 views

Postfix Questions [closed]

Kindly find your help on the below, I'm a beginner and I've Bulk of questions. I've downloaded postfix 2.10.2.tar.gz to install on RHEL server 5.9. Installation will be performed via source code. I ...
0
votes
1answer
88 views

nfs autofs automount of exported filesystems is empty on nfs server

I am having issues with empty nfs automounts on the nfs server itself. I'm running RHEL5.7 64bit exporting 4 directories as follows: /export/site/server13 *(fsid=0,rw,sync,crossmnt) ...
-1
votes
2answers
44 views

Postfix Configuration files

Kindly find your help on th below :) I am about to install postfix 2.10.2 on my RHEL server 5.9 I'll do this via source code. I need to reconfigure paths in main.cf, Example: /etc/postfix -> ...
1
vote
0answers
223 views

Linux Kernel complaining about TSC when selected clock source is Hyper V

We are running RHEL 6 boxes on HyperV with Windows Server 2012. On a few on our RHEL boxes, I am seeing this error in /var/log/messages kernel: Clocksource tsc unstable (delta = -62519781 ns). ...
1
vote
2answers
206 views

HP ProLiant DL380e Gen8 server - SPP use

I am planning to install Oracle Linux 6.4 on an HP ProLiant DL380e Gen8 server. I have been advised to use Service Pack for Proliant SSP DVD to install/update the missing utilities drivers for Oracle ...
0
votes
0answers
53 views

Speeding up Winbind group lookups?

I have an RHEL 6 server bound to an AD domain. Everything works fine but group lookups are extremely slow. Some lookups can take over 60 seconds. This is very painful when running sudo and when users ...
1
vote
1answer
50 views

What are the most optimal permissions for /bin/su?

I want users to be able to use "sudo su -", but not to switch user by password. What are the most optimal permissions for /bin/su? Right now it's: -rwsr-xr-x. 1 root root 42436 Jul 26 18:19 /bin/su ...
1
vote
0answers
41 views

Backup RHEL 5 Web Server Disk and DB Data to USB Drive, Best Way to do this?

We are using a dedicated web server with Redhat Enterprise Linux 5 installed, we are using this to host a couple of our websites. We asked our host to attach an external USB hard drive to our server ...
-1
votes
2answers
38 views

How to find out all installed software in our RedHat Enterprise 5 server? [duplicate]

We're moving servers and I need to make a list of all software installed in our server so we could install it too in the new one we'll get. Current server details: Redhat Enterprise Linux 5 Using ...
1
vote
2answers
55 views

OEL fresh install while keeping old LogVols

I've been asked to install OEL 5.x on a server and setup a disk with a few directories (there's only one disk in the server). So I have an OEL 5.x server wtih multiple log volumes in a volume group: ...
0
votes
0answers
55 views

Installing Upstart on Centos 5.10 Final… pkg-config dependency issue

I am trying to install upstart version 1.11 from source on a Centos 5.10 Final box. BTW i don't have option or privileges to upgrade this. I am at this point where it is complaining about the ...
3
votes
2answers
93 views

I see a dot after -rwxr-xr-x

Whenever I issue ls -al command in my server I see a dot after -rwxr-xr-x like - -rwxr-xr-x. Can anyone tell me what that means? I can't get any clue from the internet.
0
votes
1answer
72 views

What is the function of the cimserver daemon?

I noticed in /var/log/messsages a process 'cimserver' was logging some interesting messages: Nov 27 15:33:37 lb-web-standby cimserver[2250]: Failed to deliver an indication: Cannot connect to ...
4
votes
1answer
72 views

Why would Puppet exclude a file resource without error?

The oddest thing is happening during this Puppet run (using Puppet Apply) and it has me perplexed. I've tried my usual channels to find solutions but I cannot find anything on the topic. I apologize ...
0
votes
0answers
27 views

CentOS how to assign hostname from DHCP

I would like to know if it is possible to assign system hostname from DHCP directly, without the need to edit /etc/sysconfig/network or add the name to /etc/hosts or execute hostname "vm name". Thank ...
0
votes
0answers
70 views

Can connect to LDAP server, but cannot bind: OpenLdap error message: Can't contact LDAP server

We have a PHP application deployed on a RHEL6 machine that relies on some ldap calls to function. In particular, ldap_connect and ldap_bind are used to verify users and also to look up their details. ...