**DO NOT USE!** This tag is slated for deletion See this meta discussion: http://meta.superuser.com/q/8402/107240. Questions about the OS, such as Red Hat Enterprise Linux, should use [rhel] or the like. Red Hat is the developer, the company itself.

learn more… | top users | synonyms

0
votes
1answer
290 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 ...
0
votes
1answer
231 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 ...
0
votes
1answer
49 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 ...
0
votes
1answer
40 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 ...
0
votes
1answer
152 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 ...
2
votes
1answer
419 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 -...
0
votes
2answers
55 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 ...
7
votes
3answers
3k 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 ...
0
votes
1answer
25 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 ...
1
vote
1answer
104 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: can'...
0
votes
1answer
539 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 ...
1
vote
1answer
229 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 ...
1
vote
1answer
348 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
1
vote
1answer
388 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 ...
0
votes
1answer
146 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 ...
0
votes
2answers
194 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 - [sudo]...
0
votes
1answer
1k 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 ...
0
votes
0answers
37 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 ...
4
votes
1answer
537 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?
0
votes
1answer
38 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 ...
3
votes
3answers
2k 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 ...
0
votes
1answer
144 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 ...
0
votes
0answers
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 ...
0
votes
1answer
201 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 ...
0
votes
1answer
540 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 ...
3
votes
1answer
1k 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 ...
0
votes
2answers
368 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 ...
1
vote
0answers
17 views

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 ...
5
votes
1answer
944 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 ...
7
votes
3answers
1k 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 ...
0
votes
1answer
47 views

Initial passwords pre-expiration in Red Hat

I need inital passwords which was set by root to be pre-expired. For example: root# useradd user1 root# passwd user1 After that password need to be expired. It can be achieved by command root# ...
0
votes
0answers
65 views

VirtualBox errors out saying it needs more free disk space when space is clearly available

At my work environment we use VirtualBox for testing. It is set up as Windows host and RHEL 6 as client. Now during testing sometimes the error message popping up which says: You need to free ...
1
vote
0answers
270 views

Set up sftp mysql authentication with chroot

How do I set up an openssh SFTP server that authenticates against a MySQL table where the users are jailed? Each user will need to have its own jail: /home/sftp/john /home/sftp/jane etc.. However ...
0
votes
1answer
1k views

cannot open `' for reading: No such file or directory

I am trying to run .sh file on RH6 and getting this error... cannot open '' for reading: No such file or directory The script I am running is internally referencing other scripts, located in same ...
0
votes
2answers
3k views

Using PuTTY private key for new user on AWS EC2 Server

I started an AWS EC2 instance. I can connect to my instance with the user ec2-user using the SSH private key generated by Amazon. I followed the directions at: http://docs.aws.amazon.com/AWSEC2/...
1
vote
1answer
2k views

-bash: export: ''not a valid identifier when logging into terminal

Hi Whenever I log into the terminal I get the following error -bash: export: `/usr/lib64/qt-3.3/bin:/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/...
1
vote
1answer
4k views

Redhat Linux /lib/libc.so.6: version `GLIBC_2.16' not found (required by /lib/libncurses.so.5)

I am running a server RHEL 6.4 which currently has GLIBC 2.12 installed on it. We are trying to run a program which gives this error /lib/libc.so.6: version `GLIBC_2.16' not found (required by /lib/...
0
votes
2answers
290 views

Why doesn't the centos devtools repo work on redhat?

I have RedHat 6 installed and would like to use the Centos 6 devtools. I found instructions for using the repo here. I have tested this method on Centos 6 and it worked fine. However, it doesn't ...
0
votes
1answer
46 views

how to find out if I can use HP secure encryption

I have a server that does not have an order sheet of what all was included when the server was bought. I would like to try and implement HP Secure Encryption (link) but am not sure if I have all the ...
0
votes
1answer
507 views

mod_perl not active on Apache/2.2.15 (Red Hat)

I am using OTRS on a RedHat 6.5 with apache2 and mod_perl2. One of my servers (Sandbox environment) has the following (yum info feedback): Installed Packages Name : httpd Arch : x86_64 ...
0
votes
1answer
1k views

Why Oracle java do not appears in the alternatives command on redhat 6.5?

I have redhat 6.5 x64 and java preinstalled on it. The command java - version shows: java version "1.7.0_45" OpenJDK Runtime Environment (rhel-2.4.3.3.el6-x86_64 u45-b15) OpenJDK 64-Bit Server VM (...
1
vote
1answer
386 views

Putty copy/paste not working in Red Hat outside Putty window

When using Windows, every time I use putty to access a Linux/Unix box, selecting something on the screen or CTRL+INS, it will copy what is selected and outside the Putty window, if I CTRL+V it paste ...
1
vote
2answers
479 views

CentOS 7 installation issue due to unsupported virtualization by my CPU

I need to Install CentOS 7 on my computer for preparation of my RHCSA/RHCE 7 exams. I have a laptop that has a 64 bit CPU (with 64 bit Windows 7 installed on it), but the CPU does not support ...
0
votes
1answer
3k views

How to dual boot Windows 7 and Red Hat Enterprise Linux 7?

I first installed Windows 7. Then I installed RHEL 7 and GRUB is not showing. I cannot boot in Windows 7. I've searched all over the net but the tutorial I've seen is only in RHEL 6. How can I ...
2
votes
1answer
591 views

Initial MySQL 5.7 installation on RHEL Instance Fails to Start

I did a standard MySQL install with Chef on an AMI on AWS. Here's the recipe: mysql_service 'default' do bind_address '0.0.0.0' port '3306' version '5.7' initial_root_password 'hunter2' ...
2
votes
1answer
2k views

Firewalld - allowing ICMP in custom zone (centos 7 / redhat 7)

I want to enable ICMP echo-reply in a zone defined by source. I have a zone MONITORING where I want to permit some services like mysql and echo-reply. Permiting services like mysql is simple, but I ...
1
vote
1answer
158 views

How to extract single file from large tar/tar.gz file

What I want to do is to extract a single file from a huge tar file, instead of extracting the whole tar. I am using RHEL 6.4 I Googled it and tried the following: tar --extract --file=some.tar ./...
0
votes
1answer
802 views

“kdb5_util create” fails with an error

krb5-server 1.10.3-33.el6 on CentOS 6.5. I'm following the Red Hat KDC Instructions. Right there at the start, the instructions give me /usr/sbin/kdb5_util create -s. If I run that, I get this: # /...
1
vote
1answer
26 views

Directory Permission

My server is running redhat and has two users A and B, User A ownes /dirA Now I have created /dirA/dirB and did chown -R B:B /dirA/dirB/ when I su B and cd /dirA/dirB/ it workes fine. But when I ...
1
vote
0answers
51 views

Root access permission in normal user directories?

Short story; I run a setup as root to install a program, which will create some files and directories in home folder of a normal user. The error is I don't have write permission to it. So I go to the ...