Red Hat Enterprise Linux (RHEL) is a commercially supported Linux distribution.

learn more… | top users | synonyms (1)

2
votes
0answers
64 views

Detect attached monitors when X is not running

I'm working with machines that are running RHEL6. I need to detect whether a monitor is plugged in when X is either not running or has not started yet, for example during bootup. Is there any way to ...
2
votes
0answers
508 views

Run a command before services are started

I have a Oracle Linux 6.3 system on which I would like to run a command when the machines starts up before any other services are started. The reason for this is to try and work around a bug in RHEL 6....
2
votes
0answers
753 views

How to switch user if the Screen is Lock

Sometime this happen that when I had to do something on server I find that the screen is lock and I dont know the password of that user to unlock it and switch the user. So i need to know that How to ...
2
votes
0answers
2k views

Printing failure at a network printer in linux

I added a network printer to my network by the RedHat Enterprise workstation 6 linux GUI. It seemed that the printer setting did find the network printer. However, whenever I tried to print, the job ...
2
votes
0answers
925 views

“Remote function call interrupts” (CAL in /proc interrupts). What is it?

I'm running a test program which generates a large number of threads and asynchronous I/O. I'm seeing very high counts of these interrupts in /proc/interrupts, the program cannot scale beyond a ...
1
vote
0answers
11 views

removing spare from array using hpacucli

Whilst configuring a new array I have somehow accidentally added the same disk to 2 arrays: => ctrl all show config Smart Array P400 in Slot 1 (sn: PAFGK0P9SX036K) array A (SAS,...
1
vote
0answers
29 views

How to test new user login?

I've done some searching on Google and SE and have not found what I need using my search terms. Accessing RHEL 5.10 (Tikanga) from Windows 7. I am making a new user and need to make sure their ...
1
vote
0answers
29 views

Installing RHEL to multiple-boot with Windows and two other Linux distributions

Alright, so I made an earlier attempt to install RHEL 7.2 with automatic partitioning, and it turned into a mess since I have 3 other operating systems installed (windows + 2 Debian based Linux ...
1
vote
0answers
16 views

Xvfb stuck at “built-in extension GLX” on Amazon Linux

I started to use AWS EC2 with Amazon Linux a few days ago. I am running java with selenium webdriver over firefox to get some data from websites, and it works well when running on my windows computer. ...
1
vote
0answers
20 views

Changing CentOS 7 machines disables terminal access during background task

Based on this other posting, I typed the following command into a CentOS 7 terminal on a devbox that has the gnome GUI, and was able to continue to use the terminal for other commands while the ...
1
vote
0answers
70 views

Why is my network unreachable in virtual machine with RHEL 7.2?

I got a 30-Day evaluation of RHEL 7.2. I installed into a VirtualBox machine, and tried to register my subscription: # subscription-manager register Registering to: subscription.rhn.redhat.com:443/...
1
vote
0answers
29 views

Cannot add group on RHEL desktop

Question: why does the groupadd fail here? Is it related to SELinux or maybe a bug? I found the mv /etc/group+ /etc/group problem via strace groupadd.. [root@notebook ~]# groupadd testing groupadd:...
1
vote
0answers
23 views

Should DNS (PTR Records) be configured differently for different ipv6 networks?

I am configuring DNS forward and reverse lookup for IPv6(Redhat). For both /64 and /120 prefix i am using below configuration for PTR records. for address 6b00:8a00:a000:11a1::a2b:1c9f (Only a ...
1
vote
0answers
34 views

rhel - file modification logs

I found a strange file in my /home/user named FireZeMissiles1111.tmp. I am the sole user and did not create it, so it is kind of suspicious. It may have been left there by a program who's programmer ...
1
vote
0answers
19 views

Using mail spool file for an entry in /etc/aliases gives errors in EL7

For years (with EL6 and before), I have successfully used entries like this in my /etc/aliases file: bugs: /var/spool/mail/bugs The idea being mail to a non-user can be shoved into a file for ...
1
vote
0answers
49 views

YUM: updating repo's GPG key

Haven't found the answer for this in docs: how often Yum refreshes the GPG key of a repo, if it was obtained from the net? For instance, I've got this repo config: [myrepo] name=myrepo baseurl=http:/...
1
vote
0answers
19 views

Prevent loop device partitions from being detected

I'm moving a work project from RHEL 6 (Kernel 2.6.32) to RHEL 7 (Kernel 3.10.0). The project involves the building of a raw disk image files to be used on virtual machines, these are representative ...
1
vote
0answers
11 views

Adding fcontext to unconfined application

This feels like the most horrid twist of fate ever... A user is having me setup tomEE (apache-tomee-jaxrs-1.7.4). This is on a RHEL6 machine. I've installed from the tarball available from apache's ...
1
vote
0answers
42 views

What does TCPRcvCoalesce, TCPAutoCorking and TCPHystartTrainCwnd in netstat mean?

We have some RHEL7 Apache reverse proxies that experienced a performance degradation event. After a few hours, restarting Apache restored performance to normal levels. We are trying to determine the ...
1
vote
0answers
24 views

Realtime Scheduling and hanging processes

This may be a "you are dumb" question, but at this point I'm hoping for just a new avenue to look down. We run some software on various systems at realtime priority (SCHED_FIFO, Priority: 99) To hit ...
1
vote
0answers
11 views

GNOME-SHELL tray with several rows

How can I make the tray use several rows, not just one? Using RHEL7.2
1
vote
0answers
25 views

Invalid script entry point, A callable suffix is required

I'm trying to install btrfs-sxbackup on RHEL7. It says: Installation: pip install btrfs-sxbackup Required: python3 I installed python34 from epel. There's no pip for it, so I installed it, ...
1
vote
0answers
45 views

Red Hat vNIC(Virtual NIC) association to physical NIC

I have a virtual network interface named bond0.700 connected to a vlan (ID 700), and 6 physical NIC (eth0 to 5) on RHEL 5.5. Hint : [root@rhle ~]$ cd /sys/devices/virtual/net [root@rhle net]$ ls -...
1
vote
0answers
50 views

Methods to find out what remounts /sys readonly (RHEL 6.7)

A few colleagues intermittently have issues with suspending/hibernating their computers (running RHEL 6.7, normal workstation install, nothing special). As it turned out, the problem was that /sys was ...
1
vote
0answers
22 views

Google map api and rhel proxy server

I have a RHEL virtual server that connects to our corporate environment via a proxy server. Using a Google Map API from my desktop, which sits within the corporate environment, retrieves data ...
1
vote
0answers
15 views

Recreating local selinux contexts after OS Reinstallation

We have added a few specific contexts to our SELinux via the "semanage fcontext ..." command. The patterns are stored in /etc/selinux/targetd/contexts/files/file_contexts.local. Assuming that we ...
1
vote
0answers
27 views

Permanently Configure two X Servers

I'm trying to permanently configure a second X server to start at runtime on RHEL 7. I am aware that I can start a second x server using startx -- :1 vt 2, but I'd much rather integrate it to the xorg....
1
vote
0answers
59 views

sar/sysstat output logs to a 2nd directory

We're running RHEL on one server and I need to report some stats about the machine. sysstat/sar does a great job but I need the logs to report starting with 6am until next morning at 6am and output ...
1
vote
0answers
79 views

gdm Pop-Up Window on Login

So I was using a bit of bash script to get a popup window to appear on login for our RHEL 7 machines. I put the following code in "/etc/gdm/PreSession/Default". /usr/bin/zenity --warning --title="...
1
vote
0answers
392 views

Redhat error while loading shared libraries: libkeyutils.so.1: cannot open shared object file: Permission denied

I just installed and am trying to start rpcbind on my redhat 7 machine. I'm new to linux so I'm having some trouble figuring out what to do next. I'm running all of these commands as the root user. ...
1
vote
0answers
307 views

RHEL 7 Still CPU Frequency Scaling

When machine is imaged with: RHEL6.x CPU speeds report full 3.3Ghz speed for all CPUs cpupowerutils is not installed RHEL7.x CPU speeds vary (shown in example below) cpupowerutils is installed ...
1
vote
0answers
28 views

Identifying disk drives during RHEL/CentOS/Fedora Installation

What steps are followed in order to identify a connected disk drive during Linux installation ? I am interested RHEL/CentOS/Fedora procedures. Is it entirely depends on the Kernel package and drivers ?...
1
vote
0answers
77 views

problem while using “ yum groups ”

When i am trying to use yum groups commands in RHEL 7 it is giving me following output. #yum groups list There is no installed groups file. Maybe run: yum groups mark convert (see man yum) I have ...
1
vote
0answers
109 views

Memory Leak trackdown

I have a server running Red Hat Enterprise Linux Server release 6.7. The server runs a number of java processes including a tomcat server with nginx webserver. The server has 12 GB of ram allocated ...
1
vote
0answers
24 views

Connecting a Redhat virtual machine to the host NIC that uses network bonds

I'm running Redhat 6.6 on severs with multiple interfaces. And I am successfully using network bonds on the interfaces to connect with the different VLANs on the existing network. The servers are ...
1
vote
0answers
20 views

Virtualbox Guest Additions packages?

As I move to look at virtualbox for the small/medium business where I've used vmware previously, I'm interested in a proper kickstart for my RHEL5/6/7 hosts. I'm used to using proper vmware guest ...
1
vote
0answers
160 views

Mounting Sharepoint folders in Linux

We are using DAVfs to load a Share Point folder in our environment. We installed both neon and davfs libraries to try mounting. On mounting, we are running into the below. Any suggestions? Could not ...
1
vote
0answers
102 views

Are docker container security limits limited by the host's security limits?

Lets say that I have a host which has max locked memory set to 64kb: [root@host]# ulimit -l 64 and a docker container running in that host with no limits: [root@container]# ulimit -l ...
1
vote
0answers
49 views

RHEL 5 Kernel Panic

I performed some fdisk operation on vmdisk. After rebooting I got the following error: unmounting old /dev unmounting old /proc unmounting old /sys switchroot: mount failed: No such file or directory ...
1
vote
0answers
171 views

Java related error met when installing COMSOL

I would like to install a software called COMSOL on Redhat (Red Hat Enterprise Linux Server release 6.4 (Santiago)) cluster. COMSOL is designed as a Windows software, and its installation requires X ...
1
vote
0answers
41 views

Can't determine where umask is being changed

On my RHEL system, my /etc/login.defs has the line UMASK 077. I have one user who has a .cshrc which changes his umask to 022. I also have a second user who does not have a .cshrc or .bashrc or any ...
1
vote
0answers
16 views

enabling and accessing multiple comports in RHEL 6.6

I am using a motherboard with The Intel Haswell platform I have installed RHEL 6.6 in it the board is having six comports. I am unable to access more the 2 comports. What kind of setting do I need to ...
1
vote
0answers
36 views

How do I get new filesystem formats to use in mkfs?

I am currently attempting to run some benchmark tests using different filesystem formats. However, I can only use the ext family, cramfs, and msdos formats with mkfs since those are the only formats ...
1
vote
0answers
124 views

lp prints blank pages for pure text file

Printing a text file through lp result in blank page while printing same file through gedit works fine. lp is able to print pdf and jpg image files, but not text file. On further looking in to ...
1
vote
0answers
53 views

Get window name on Red Hat GNOME

Is it possible to get the title of a window (e.g., gnome-terminal) via a terminal command, without installing any outside packages such as xdotool, xprop or wmctrl? Much appreciated.
1
vote
0answers
108 views

Recover VG after Adding Disks and Rebooting

I had an old 1.5 TB NTFS formatted disk I wanted to use in by RHEL 7 box, so I put it in my desktop booted, and proceed to delete the partition table using fdisk. I created a physical volume on it ...
1
vote
0answers
687 views

receiving error message while trying to register for subscription for rhel6

I am trying to subscribe to redhat from the terminal. I have registered an account at https://access.redhat.com/labs/registrationassistant/ . So I am using those credentials to register my ...
1
vote
0answers
29 views

Getting some unwanted message in linux os

When Linux (RHEL) OS is booted I am getting a message as beiscsi_ep_connect shost is null What does it mean?
1
vote
0answers
3k views

Installing custom RPM says “does not update installed package”

I've inherited some servers which have previously always had its software as custom compiled versions (apache, perl, mod_perl etc). I was thinking than rather than compile every time, it may be better ...
1
vote
0answers
795 views

turn on numlock at login screen. GDM

GDM is turning off numlock key. I have tried following: a) installing numlockx and inserting following lines at /etc/gdm/Init/Default if [ -x /usr/bin/numlockx ]; then /usr/bin/numlockx on fi b)...