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2
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2answers
3k views

“Cannot fork: retry…” error in RH5. Need info on nproc

We had a server effectively go down this morning. SSH access cut out, and at least temporarily network access went down as well. We were able to log in using out-of-band access and were presented with ...
0
votes
2answers
89 views

Unable to mount CIFS share, but able to mount on others

I have a working windows 2008 R2 file share that I can connect to from one server (running redhat 6.6) with the following syntax in /etc/fstab //servername/ELK\es1 /ES1 cifs ...
1
vote
4answers
9k views

how to change screen resolution in rhel/centos 6?

I have cent os 6 dvd installed on my computer.my monitor resolution is 1920 X 1080. i cannot increase screen resolution to 1920 X 1080. system->preference->Display can give maximum resolution as 1280 ...
1
vote
1answer
41 views

how to stop a running startx on linux. Not just changing inittab or init3

i am using rhel5 / rhel6 and i would like know how to "stop startx". i have google this issue and most of the solutions are change inittab to 5, or init 3 etc. For example, after the server boot up ...
0
votes
0answers
9 views

Disable showing drives that are mulitpathed

We have servers(RHEL 6.7) that have multipath SAN attached disks assigned to them. The multipathing is setup and all works great in that aspect. The issue comes in when you view the Computer within ...
0
votes
2answers
95 views

Mirroring VGs between two Linux server

I have two nodes , each has 20 HDDs (identical size) . Both nodes are configured with 2 VGs , each VG was created using 10 disks . 1 VG is called SAN the 2nd is called NAS . Node1- will provide nfs ...
0
votes
2answers
161 views

Centos 7 on Dell PowerEdge R510

I have a Dell PowerEdge R510 and I want to install the latest version of CentOS on it (currently 7.1) so I can maintain the system with updates. RHEL is supported by Dell, so I assume CentOS can be ...
0
votes
3answers
614 views

apache server not listening on port 80

Both my workstation and server are on the same lan segment and can ping each other (and I can ssh into the server from my workstation without issues). Did a default install of apache on centos 7. ...
-2
votes
1answer
47 views

SSHD working with keys but refuses connection when attempting to implement passwords

I have SSHD working on an EC2 RHEL image using keys. I am trying to enable password-based login for specific users. When I do so using Match User, connections are refused for all users, even those ...
0
votes
0answers
67 views

New EC2 vsftpd installation will not start, giving code=exited, status=2

I am trying to implement an FTP server on an EC2 instance. I cannot get the FTP server to start and it gives me very little idea of what is wrong. I'd appreciate any information on either how to ...
5
votes
3answers
10k views

NTP configuration not recognized?

I'm trying to configure NTP on my machine but it seems that the parameters I set are not being read by the system. Below is my /etc/ntp.conf file. (I applied the most basic configuration to eliminate ...
0
votes
1answer
68 views

Building php v5.6.9 for use with Apache 2.4 on CentOS 6.6

I'm using Webtactic's PHP 5.6.9 src rpm to build a Software Collection version of PHP that I can use with Apache 2.4 on Centos 6.6. Andy Thompson has already written all the SCL RPM macros into the ...
4
votes
6answers
3k views

How to tell if linux disk IO is causing excessive (> 1 second) application stalls

I have a Java application performing a large volume (hundreds of MB) of continuous output (streaming plain text) to about a dozen files a ext3 SAN filesystem. Occasionally, this application pauses for ...
1
vote
1answer
15 views

How to remove installed third party product from root parition and reinstall it on a diferent partition?

I am newbie to linux. I have read about drive/partition/volume of linux for better understanding of what I am about to deal with. Here is the situation. I am a IBM BPM application developer and I ...
0
votes
1answer
40 views

how to force ldap user to change password at first login

I have gone through the similar posts on the same question, yet couldn't find the correct answer to implement. I need to force all LDAP users to change their default password set by administrator at ...
1
vote
1answer
67 views

Own yum repository – strange package naming with Oracle JDK

I just created a custom YUM repository via createrepo on one of our servers and made the other ones aware of it. I have three RPMs in the repository: [foo@one repository]$ ls jdk-7u4-linux-x64.rpm ...
0
votes
0answers
38 views

Two virtual trunk ports on RHEL

Is the following setup doable on Linux? Given one physical interface eth0, I want two virtual interfaces: vnet0 - carries VLANs 1,2 vnet1 - carries VLANs 3,4 Both interfaces should receive the ...
2
votes
2answers
134 views

System refuses to boot RHEL DVD, but will boot other distos

I'm trying to install RHEL7 on a Dell R210. The system was RHEL5, but had shred run against its disk. I tried booting a DVD with the RHEL7 installer, but got nothing, it would not boot. I've ...
0
votes
1answer
24 views

Determine if security software is blocking application process on RHEL Linux [closed]

We deployed a networking application implemented in Java 8 on RHEL 7.1. Periodically, the application gets stuck attempting to communicate on non-standard ports. Is there any way to determine if other ...
2
votes
2answers
295 views

How do I force NetworkManager to update /etc/resolv.conf?

If I add a new DNS server using nmcli connection modify eth0 +ipv4.dns 8.8.8.8, I still have to update /etc/resolv.conf for the resolver to pick up the changes, right? So how do I force the update? ...
1
vote
1answer
94 views

how to bring up network-interfaces and bridges in specific order at boot time

Currently, my setup is having many nodes, each having RHEL 7 installed, with each node having only one single interface. I am using ovs-bridge and a vlan-tagged interface within the host. I use ...
2
votes
0answers
20 views

Can Satellite registration be done in Kickstart's `%pre` stanza?

In a presentation from 2010 RedHat Summit, I saw Satellite registration (rhnreg_ks) done in a %pre stanza, while RedHat's current docs (as well as this answer) do it in %post. Registering in %post ...
2
votes
0answers
28 views

Custom naming a dummy nic on RHEL7.1?

Is there a way to create a dummy network device named, say, "asdf" on RHEL7.1? In other words, I want to custom name NICs and not have them backed by any physical device. Also which one is more ...
0
votes
0answers
97 views

yum install fails with key error

This install fails: yum install osad ... warning: /var/cache/yum/x86_64/7/spacewalk-client/packages/osad- 5.11.57-1.el7.noarch.rpm: Header V4 RSA/SHA1 Signature, key ID 066e5810: NOKEY Public key ...
0
votes
1answer
55 views

Redhat server broken error while loading shared libraries: libz.so.1: cannot open shared object file

My Linux server seems to be broken. I can't do yum, rpm or neither can start any services It throws out following error, everything time I try to do anything related installation. error while ...
1
vote
4answers
1k views

Bring up a virtual interface without checking if it's up elsewhere

Is there a way to bring up a virtual interface without it first sending an arping to check if that IP address is already in use elsewhere? I'm working with a proprietary product that recommends ...
2
votes
1answer
65 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?
0
votes
5answers
412 views

Oracle 10g install on Linux Red Hat 4.0

New to linux redhat and oracle 10g. Having problems creating an Oracle software user. Input as /root /user/sbin/useradd -g oinstall -G dba[,oper] oracle Output useradd: unknown group dba[ useradd: ...
1
vote
1answer
23 views

Apache serving content via smb

So basically, I want to host a network smb share on my Redhat 6.2 Apache httpd server. My basic configuration is outlined below, however, I keep getting errors. So my basic configuration ...
1
vote
1answer
73 views

GitLab redirection with Apache

I am struggling to configure GitLab 8 with Apache 2.4 on RHEL 7. So far, I have two options that are both unsatisfying: either I use the following Apache configuration file and have GitLab working ...
4
votes
3answers
393 views

How to SSH after remotely restarting Redhat and enter recovery mode?

I need to enter recovery mode of my redhat box which is running remotely on a virtual machine. I use RedHat 5 64-bit Enterprise Edition. I am logged into the box using SSH. I can restart using the ...
1
vote
0answers
158 views

Install yum module for Python 2.6

I am running a Red Hat Enterprise 5.11 Server and just installed Python 2.6 in addition to version 2.4, which is system default. Unfortunately, I don't have access to the yum module anymore which I ...
-1
votes
2answers
39 views

Downloading .sh file from git repository [closed]

I am trying to download a file from my git repository onto a VM, and I do so running the following command: curl -O "https://git.com/projects/RENG/repos/test.sh" -k After I run this command I see ...
6
votes
2answers
6k views

What are the disadvantages of disabling tinker panic 0 in NTP?

We sometimes have the problem that new servers have the wrong time in the bios, so there time can be off by a month. When you suspend a VM in VMware and then unsuspend it, the time will be off too. ...
0
votes
1answer
190 views

Mongodb + Kerberos BadValue SASL mechanism GSSAPI is not supported

I am trying to run an instance of mongodb with the authentication mechanism GSS-API. This is the command: mongod --dbpath /home/ec2-user/db/node2/data --auth --setParameter ...
4
votes
1answer
2k views

What is the recommended method to prepare Red Hat/CentOS 7 templates?

If I need to deploy Red Hat 7 from template, I would like to take the recommended steps to make my "golden image" clean. It should boot to the first boot prompt and guide the user through the typical ...
0
votes
2answers
34 views

How can i exclude a package from getting updated in redhat using Yum

I want to exclude the package from being checked while updating the server using yum. Here is the error thrown. ---> Package libstdc++.i386 0:2.8.0-8 will be updated --> Processing ...
5
votes
1answer
7k views

What exactly do --limit 1/s and --limit-burst mean in iptables rules?

I'm using CentOS 5.x trying to wrap my mind around the following iptables rule on one of my servers: -A RH-Firewall-1-INPUT -p icmp --icmp-type echo-request -m limit --limit 1/s -j ACCEPT On ...
40
votes
6answers
4k views

How can you tell what a server actually does? [closed]

I've been handed 3 Linux boxes, 1 front facing with apache on it and another 2 which, as far as I can tell, don't do an awful lot. All running on Redhat. The question is simple: How can I tell what ...
0
votes
1answer
50 views

How to import SSL certificates in a 389 Directory Server using the command line?

I am trying to setup a new 389 Directory Server in a RHEL machine and I am trying to configure SSL for LDAPS using the command line. I have just spent several hours digging through every piece of ...
1
vote
1answer
50 views

How can I trust my self signed root CA on Fedora?

I've generated a root CA certificate and key on my fedora system, using the following command: openssl req -new -x509 -extensions v3_ca -keyout \ /etc/pki/CA/private/cakey.pem -out ...
0
votes
0answers
69 views

RHEL6 No package yum-plugin-fastestmirror available

ELRepo : HomePage - Get started says following: To make use of our mirror system, please also install yum-plugin-fastestmirror. So, I'm trying to install fastestmirror plugin for yum and ...
0
votes
0answers
62 views

Openvpn “TLS ERROR cannot locate hmac in incoming packet”

In server side, the logs were showing that TLS ERROR: cannot locate hmac in incoming packet, whenever I accessing in client laptop.. Please suggest me the possible solutions ....
1
vote
0answers
49 views

Putty connection refused until server login

Our Red hat main host reboots every night and when I try to connect with Putty I get connection refused. Then after I physically go to the server and login to it and go back to my other computer I am ...
0
votes
0answers
15 views

SHA256, OpenSSL 0.9.8q, and HTTPd 2.0.59

I recently had a need to upgrade an old server. The server fulfills a very specific purpose and as such has not been kept up to date. With the recent push for SSL to utilize SHA256 I needed to ...
0
votes
1answer
66 views

RHEL expand disk size

Notice: I know this type of question has been asked (many times) before, but I have some remarks about the provided answers. I run a RHEL (7.1) VM on Hyper-V. The VM has 2 IDE disks attached. I need ...
0
votes
2answers
11k views

Install RAID driver on HP DL380 G9

I'm trying to install RHEL 6.2 on HP DL380 G9, but the I cannot find the storage during the installation. I thought maybe RHEL 6.2 does not support HP P440AR contoller by default, then I go to HP ...
0
votes
1answer
4k 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 ...
1
vote
3answers
144 views

How do I trust a self signed certificate?

I've generated a self signed certificate using openssl - it's entirely self signed and not signed by a self signed CA. I've imported it successfully into the nss database for use by browsers. I now ...
2
votes
1answer
83 views

Redhat to Centos Restore

I feel like this might be a noob question, but I just wanted to verify my suspicions. I have a production environment that is hosted on a Redhat server. I have a copy of the site that is hosed on ...