Questions about the OS, such as Red Hat Enterprise Linux, should use [rhel] or the like. Red Hat is the developer, the company itself.

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How to save two IPS in single network card

I would like to ask you one question i am using centos 6.6 i am going to configure single network card with two IP address my configuration look like this /etc/sysconfig/network-scripts ...
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6 views

Linux Redhat account claims locked even after unlocking

The local linux account won't allow the user to login even after unlocking it. The following command provides the following output: [userBar@host]$ sudo usermod -U userFoo [sudo] password for ...
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1answer
12 views

System memory is full utilized while using tape drive software

I'm using redhat enterprise linux 6 When using IBM tape drive, It fully utilizes system memory in only two minutes. Here is the result of "free -m" command: total used ...
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What is the default login for Red Hat Enterprise 7.1 KVM guest?

I cannot find this in any Red Hat documentation, but before I call for tech support perhaps someone here knows the answer. Having just installed an evaluation image for RH 7.1, I have my guest VM to ...
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1answer
25 views

Understanding fdisk -l output and calculating storage

I have basic understanding of disk. (Please correct me if i am wrong) I understand on 1 platter, there are 2 heads, 1 on top, and 1 on bottom. Both side of the platter is able to provide storage ? On ...
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20 views

CentOS / RedHat DHCP working, static is not

I have installed CentOS 7 minimal install without GUI when I setup network configuration with Webmin web interface or manually editing files with VI it does not work. When I use e.g. "yum search ...
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1answer
5 views

List package maintainer on Fedora?

I need to contact the package maintainers for Crypto++ to inform them of a commit to fix a CVE. Under Debian and Ubuntu, I can apt-cache show libcrypto++ | grep Maintainer to get current and past ...
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1answer
23 views

How to use Window Manager of Linux inside VirtualBox?

I have the same problem in Redhat Linux and Debian Linux. I cannot use the normal switching between windows. I mean this square window manager: I tried all keys CMD, ALT, CTRL, FN and SHIFT and ...
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1answer
51 views

devices inside /dev - are their naming persistent by default?

Can i check if devices like sda , sdb naming in /dev/ are persistent by default or there are some udev rules in place to create persistent naming for them ? Does udev itself create device naming ...
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1answer
43 views

udev symbolic links - where is /dev/sda pointing to

It is said that udev create symbolic links identifying the actual device and /dev/disk/by-uuid is an example. [root@centos1 by-uuid]# pwd /dev/disk/by-uuid [root@centos1 by-uuid]# ls ...
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2answers
28 views

udev - am i using it, where do i see it?

It is mentioned that udev present devices in /dev for devices that are presented to the kernel and it is use to create persistent naming. I have having 2 harddisk /dev/sda /dev/sdb. How does ...
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SNMP manager to support SNMP v3 [on hold]

I have an application which works as SNMP v1/v2 manager. I want to enhace it to support SNMP v3/v4. Please guide me the impacts on source code and any readymade code for SNMP v3. Platform Linux Redhat ...
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3answers
52 views

Is sendmail a smtp server? Is there any difference between MTA and mail server?

I am new to mail and do not exactly know how it works. I have seen administrators use sendmail to send out email. Is sendmail a smtp server or is it a client that need to relies on smtp server to ...
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1answer
14 views

why do i keep getting the same $SHELL even i am on a different shell already

[oracle@SJOAM ~]$ echo $SHELL /bin/bash [oracle@SJOAM ~]$ sh sh-4.1$ echo $SHELL /bin/bash sh-4.1$ csh [oracle@SJOAM ~]$ echo $SHELL /bin/bash Why am i always in bash !? but the prompt are already ...
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1answer
18 views

using rpm -i in Linux as a normal user

I'm trying to run rpm -i to install an rpm but it fails. I must always use root to do the installation. why ? [alankoh@sjoam2 Downloads]$ rpm -i sqldeveloper-4.0.3.16.84-1.noarch.rpm error: ...
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1answer
22 views

single user vs multi user mode (without networking) init level 1 vs 2

I tried init 1 (single user mode) and i am still able to switch between users. So this leads me to think that maybe other users is not able to login if i have a network (hence single user mode) Then ...
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1answer
29 views

understanding Stats on folder in Linux

This is my stat output on a folder stat Downloads/ File: `Downloads/' Size: 4096 Blocks: 8 IO Block: 4096 directory Device: fd02h/64770d Inode: 259595 Links: 3 What does it ...
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1answer
23 views

How to recover my deleted history in terminal using #history -c

I have cleared all my history in terminal using #history -c. Now I want to recover all my commands which are cleared. please give me a reply
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1answer
27 views

xclock not showing (traditional X without X11 forwarding)

Server A -> 192.168.1.25 Server B -> 192.168.1.26 Both running Centos 6.6 with iptables off. No firewall in between. A$echo $DISPLAY :0.0 A$xclock -- Able to see xclock popup on the A screen ...
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0answers
8 views

Managing rpms and spacewalk on osx?

Does anyone know if rhnpush exists for osx? I am generating some RPM's that need to be deployed to linux but am developing on a mac. I can't seem to find where to find rhnpush and other spacewalk ...
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1answer
33 views

Using xhost, display and startx - confused

I have a client A (192.168.1.1)(vncviewer) accessing Server B (192.168.2.1) (RHEL6) to run a installer. The installation pre-requisite is to set the xhost and DISPLAY properly. Q1) Please correct me ...
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2answers
27 views

Logging into sudo with a hashed password

I am curious as to whether or not I can pass the sudo password prompt the hashed sha512(?) password and log in to root that way. So it might look something like this: [user@device ~]$ sudo su - ...
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16 views

Install ypbind in Oracle Linux 7

I need to install ypbind in order to set the NIS settings at an Oracle Linux client. So I downloaded a red hat version of this package (since OL7 is just an rhel clone) and I tried the following: ...
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1answer
50 views

Openvswitch: multiple virtual bridges over one bonding interface

My ultimate goal is to configure a RedHat 6.6 server with Openvswitch as shown in the following image: Interfaces configuratión files are: ifcfg-eth0 DEVICE=eth0 ONBOOT=yes NM_CONTROLLED=no ...
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40 views

Yum update fails [Errno -1] Metadata file does not match checksum (RedHat 5.11)

The server I'm working with is running the RedHat Entreprise : [root@xxxxxx ~]# lsb_release -irc Distributor ID: RedHatEnterpriseServer Release: 5.11 Codename: Tikanga I'm ...
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25 views

Special characters are not displayed in terminal and vim

I'm using redhat release 5.6 (Tikanga). Recently I installed a patched font that support some special characters. I'll describe what I did. Installed the font in the ~/.fonts directory Run fc-cache ...
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0answers
15 views

How to filter Remote Syslog messages on Red Hat?

I'm using a unified log on a server running Red Hat 6, receiving directed log messages from others servers and managing them with RSyslog. Until now, the /etc/rsyslog.conf have this rule: if ...
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0answers
18 views

Cannot access my port from other systems in same network

My machine is running in Red Hat Linux OS. I have setup a server using apache in port 8060. I am able to access in localhost but not is other systems for the same network. I am able to ping the ...
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1answer
52 views

landscape-sysinfo for CentOS?

I've been using /usr/bin/landscape-sysinfo on Ubuntu, and I'm now looking for a good alternative to use on a CentOS machine. Is there anyway to install the requirements to make this work on CentOS?
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25 views

Apache Spark Building Memory Issue for JVM Initialization

I am currently building Spark on my linux Red Hat 5 VM just for experiment. However, when running the mvn script or sbt script inside the spark 1.3 version source code (downloaded from the github), it ...
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33 views

Exchange Server 2013 with Linux domain controller

Consider the scenario: in DMZ LAN, a company is willing to replace Zimbra mail server (running in Linux server) with Exchange Server (running in Windows server) in LAN, employees use Windows in ...
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10 views

CentOS 7 how to set guest port to jumbo packet automatically

I'm running libvirt on CentOS7. I have an internal virtual bridge setup. Only the guest virtual ports are members of the virtual bridge, and no physical ports are members of the virtual bridge. By ...
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1answer
23 views

Identify last linux shutdown time

We have a server running RHEL 5. Sometimes the power cuts and the server is down (the UPS handles only 30 min). I want to be able to to identify the time of the shutdown, in an other term the last ...
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3answers
108 views

Installing Red Hat based OS on mbr disk

I currently have installed Windows XP and Linux Mint 17 on my laptop. My disk is MBR type because of Windows XP. I have installed linux mint without any problems, but now I am trying to install Red ...
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85 views

how to disable screensaver at login screen in RHEL 7

I am using gnome v3.8.4 for login screen in RHEL 7. I have tried setting false for following dconf settings(gsettings) [org/gnome/desktop/session] idle-delay=0 [org/gnome/desktop/screensaver] ...
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1answer
61 views

ping error two nic cards in linux pc

The problem I'm having is two NIC in my RHEL 6 server with different IP-addresses. PC1 eth0 - 10.10.0.1 eth1 - 192.168.1.1 The other computer is setup the same way. PC2 eth0 - 10.10.0.2 ...
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15 views

create double partition on cd/dvd [duplicate]

Is there any tool that can create a double partition cd/dvd ? We have clients who uses Linux or Windows and I want to create a cd that contains a partition for linux and another one for windows. If a ...
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1answer
34 views

How to include a call to ncat to a bash script?

I need to flush a memcached instance from a bash script, I found the following command which do the job: echo 'flush_all' | ncat localhost 11211 But my problem is that the script doesn't continue ...
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14 views

How to install package with locale dependencies?

I've built my own PHP5.5 on my RedHat6.6 two month ago in order to support Sybase database connections. Today I want to enable memcached support. I tried yum install php55-php-pecl-memcache.x86_64 ...
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1answer
56 views

Unable to open display to specific user in Red Hat 6.4

I am trying to install Oracle database 11g in my Red Hat 6.4 and the installer aborts with a warning followed by an error message: Warning ">>> Could not execute auto check for display ...
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15 views

Grub Fallback Not Working in Redhat 6.5

I'm trying to set up a grub fallback system in grub.conf, but none of the settings in the grub 0.97 documentation have any discernible effect. Also, there is no grub-set-default command present. This ...
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1answer
209 views

How do I get Linux to notify me about failed login attempts?

I have seen it before when you log into a Linux box wrong, when you do successfully log on, it notifies you that someone attempted to log on as you and didn't succeed. What do I need to do to make ...
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15 views

after installing Red Hat Developer Toolset 1.1 which gcc will be default old one or new gcc 4.7.2

After installing Red Hat Developer Toolset 1.1 can i compile my old source code with old gcc? which gcc will be default old one or new gcc 4.7.2
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14 views

Please I need some help in filtering out an output in the format below:

Please I need some help in filtering out an output in the format below: blah blah blah blah (loads of logs before from 08:00:00) access_log.2015-03-12-10_08_04:99.211.30.0 - - [12/Mar/2015:10:12:08 ...
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18 views

Redhat 6 Set Default NTP Arguments

I'm advised to launch ntpd with the "-g" argument to avoid having the daemon shut down if there is a gross mismatch between system time and the time NTP comes up with; this is needed because we're ...
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2answers
70 views

Copy files from Solaris to redhat via SCP command run on RedHat console

I have to copy several GB of little files (from few bytes to < 1MB). These files resides on a file system of a Solaris system. No rsync and rdiff software is available on Solaris and cannot be ...
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RHEL 5 box constantly displaying NIC statistics on console screen, how can I disable this?

I have a RHEL 5 box that is constantly displaying nic statistics on the console screen when using the KVM. This makes it very hard to do any troubleshooting when the box goes down as these statistics ...
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1answer
124 views

What happens when I truncate a file that is in use?

Around the web many people say you can truncate a file using > filename or truncate -s0 filename while file begin used I know everytime a process write in a file, the process uses a offset for ...
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76 views

Why default useradd variables aren't taken into account, when create user in GUI mode?

I'm trying to configure users password policy on RHEL 6.6 and my /etc/default/useradd file contains: # useradd defaults file GROUP=100 HOME=/home INACTIVE=-1 EXPIRE=0 SHELL=/bin/bash SKEL=/etc/skel ...
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0answers
245 views

How to configure linux to enforce new users to change their password on first login

I'm trying to configure users password policy on RHEL 6.6 and I want system to ask newly created users to change initial password on first login. Note, that I tried to set EXPIRE variable to 0 and ...