Tagged Questions

CentOS is an Enterprise-class Linux Distribution derived from Redhat Enterprise Linux sources freely provided to the public.

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Possibly Compromised - ./brute xml2014 user x08 300?

I have a long list of a process called "./brute xml2014 user x08 300" when I type in "ps aux". What does this mean? Does this mean my server is being used as a DDoS bot? Here's a screenshot of what ...
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16 views

Giving a user SFTP access only with access to subdirectory outside of home?

I have user [USER A] account which contains scripts and a downloads folder. I would like to create a new account [USER B] so that the user has read/write (SFTP and not full SSH) access to their home ...
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1answer
25 views

Is there an init.d start log?

I am experiencing a problem with an init.d script (the service won't start), so I'm wondering if a log is available so I can fix the problem.
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0answers
33 views

Learning differences between Fedora and Redhat [closed]

Background: I have a fairly decent background in linux and am currently using Arch as my primary OS. However, I am going to start working at a new job that requires using and administrating Redhat ...
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1answer
20 views

Backup Mails to new server

I have a custom domain hosted with Microsoft Outlook mail service. now they are not offering creating new accounts under my domain and I decided to move new server. so I configure all the things with ...
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1answer
140 views

CentOS 7 boots too fast and network is not ready when executing cron scripts

I have just upgraded from CentOS 6.5 to 7.0 and I am not too happy as the new systemd is probably giving me problems. It seems it is just simply booting too fast, starting up processes asynchronously ...
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1answer
63 views

disable persistent network device naming [duplicate]

I have CentOS-6.5 running in qemu-based virtual machine, with a single ethernet interface, which surprisingly is being renamed by udev from eth0 to eth1 for whoever knows reason (!) So I want to to ...
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1answer
40 views

Installing packages on multiple Centos machines

I have to install standard package like java 1.7 in 40 of my lab machines which are connected over a LAN. I know I can simply write a shell script to install something in user space of each system, ...
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1answer
82 views

How did my default file permissions get changed from 666 (before umask settings) to 04501

I have an installation of CentOS 6.5 that suddenly started having issues with dealing out file permissions on new or recreated files. when I create a file with touch, instead of the usual 644 or ...
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0answers
54 views

Why would whois take up 100% of the CPU?

Running top on my CentOS web server shows an instance of whois running from 99-100% of one of the CPUs. I've not knowingly used whois on this server before, would it be safe just to kill this ...
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0answers
13 views

Http taking all swap [closed]

I have a dedicated server running centos&cpanel with 2 GB of ram where I host several websites. All are wordpress + 1 opencart. Every 2 days or so the swap memory get consumed and server load ...
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1answer
139 views

Interdependent conflicting packages in CentOS 6.5

I've been using CentOS 6.5 as my OS for quite a while. Usually I don't have many problems with Linux installations, but as they new CentOS 6.6 was released I found myself in a bit of a problem. There ...
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91 views

Unable to use yum repos whether with baseurl or mirrorlist in CentOS 6.5

Since a couple of days, I'm unable to retrieve repositories data with Yum, in my CentOS 6.5 server. I did yum clean all a dozen of times, it emptied all but didn't solved the problem. I tried to ...
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0answers
8 views

Huawei(e303s) installation in centos 6.4

I have installed CentOS 6.4 in my system. I connected Huawei(e303s) with airtel 3g,tried installing the driver provided with Huawei its getting installed with some error. It shows error like : The ...
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0answers
50 views

Tor install on CentOS server

I have followed the instructions provided here: https://www.torproject.org/docs/rpms.html.en However, when running yum install tor, i get the following dependency error: Error: Package: ...
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1answer
30 views

Fatal Error while trying to detect swap signature

I've installed CentOS 6.5 On VMWare Workstation. I added a SCSI Virtual Disk (.vmdk) to this Machine when it was Powered On. I decided to store the Disk as a single file & allocated all disk space ...
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0answers
100 views

compiling broadcom wlan driver on centOS 7

my wireless is not working on Cent OS 7. My device was manufactured by Broadcom BCM43142 802.11b/g/n. I am trying to compile the driver with the information given here. ...
2
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1answer
57 views

Centos 6.5 not able to login with public key and login is sloooooow

I set up a new system with CentOS 6.5. I copied my public key key with: ssh-copy-id root@192.168.1.202 It took 15+ seconds for the password prompt to show, but then it copied. However ssh to ...
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1answer
46 views

Auto code completion in GEdit and VIM, for C++

Being a Visual Studio fan, I am just wondering if I can have same feature in GEdit and VIM. PS : I’m new to VIM and currently using CentOS and Ubuntu.
3
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1answer
72 views

Using X-Windows from Windows 8.1

I have a Linux box that I don't have physical access to, but I do have SSH access. I'd like to know is if there is something similar to SSH or Telnet that would allow me to use Gnome or KDE instead of ...
3
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0answers
48 views

Setting up domain with multiple servers

I am setting up a small web hosting service for my clients. I have my dedicated server which will be the shared server to host clients websites using WHM/cPanel. I have a separate VPS server that I ...
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1answer
90 views

How to remote install CentOS/RHEL 7 using a rescue image like GRML?

Assuming a remote machine where you can PXE boot into a GRML image that also provides ssh access. Now the question is how to install CentOS in such an environment. Something like KVM access is not ...
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1answer
136 views

Nslookup: command not found error on RHEL/CentOS 7

During linux installation I selected "minimal" option: When I went to run the nslookup command to look up an IP address I got the error message nslookup: command not found as shown in the example ...
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1answer
116 views

CentOS 7 cpupower not setting the CPU's to maximum

On my machine, i have power savings disable on the BIOS. When I run Ubuntu on this machine, the CPU's are running maximum at 2100 MHz. However, when I'm running CentOS 7, even with the scaling ...
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34 views

CentOS 7 and howto extend my current WIFI network

I am running CentOS 7 and I have both a wired cable and a WIFI on my box. The WIFI on my CentOS box I would really like to use to extend my current WIFI network if this is possible. My current network ...
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0answers
16 views

Stopping postfix - are messages queued when postfix is idle?

I am running some scans on my server tonight and would like to disable email notifications since there is a chance for a LOT of them to be sent out. I am planning to issue service postfix stop ...
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1answer
49 views

How can I manually reset RX / TX counters in ifconfig output without impacting data delivery?

CentOS 5.9 I'd like to reset the RX/TX counters in ifconfig output for an interface. My understanding is that these counters get reset during a reboot but I'd like to avoid rebooting. Is there ...
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1answer
41 views

CentOS machine keeps “losing” active directory membership

All of our CentOS 6 machines have been joined to our active directory domain. Each of these machines eventually "loses" their domain membership, which breaks authentication for AD users. I created a ...
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0answers
22 views

Download & install Report Lab on CentOs

I am following this link to install report lab and download parts of googlebooks as pdf. However, I am on CentOs 5, can not use apt-get, probably I need to use yum, but I do not know how. Any ...
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0answers
39 views

CentOS invalid system activity files

CentOS 6.5 server has a cron job that converts system activity files to system activity reports once per day. Periodically, sometimes as a one-off, sometimes every day for a week or more, the cron job ...
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0answers
61 views

tmux unable to start a new session? “1;2c”

Introduction I just installed tmux onto my CentOS 7 machine, but I have encountered a bewildering issue. Whenever I try to attempt to start up a session using tmux or tmux new -s session-name, it ...
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2answers
60 views

How to use sudo to delete the contents of a directory

I have a legitimate need to empty a directory to which my account does not have access (it is a cache directory used by an application, and is owned by the account that runs the application.) My ...
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0answers
53 views

nameservers erased after systemctl restart network.service

I'm working on centos 7, and having problematic behaviour when setting network interface from dhcp to static ip configuration. I edit /etc/resolv.conf, and run systemctl restart network.service The ...
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36 views

problem installing oracle instant client on my centOS machine

I have downloaded and extracted the rpm package instantclient-basic-linux.x64-12.1.0.1.0.zip from oracle website and extracted it in /usr/lib/ where the current path is: ...
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32 views

Why don't I hear audio playing from my CentOS 6.5 Vagrant box?

I want to play a wave file from my CentOS 6.5 Vagrant box using aplay and of course I want to hear the sound. This is what I do: > aplay sine.wav Playing WAVE 'sine.wav' : Signed 16 bit Little ...
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1answer
28 views

Why are --older-than and --younger-than killall options missing in RHEL/CentOS?

I've experienced this issue in cleaning up scripts written by developer who were writing for Ubuntu systems, as well as ServerFault questions like this. Is there any reason the -o, -y (--older-than ...
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1answer
14 views

Get summary count of all patches applied to a server?

Is there an easy way to get a count of the total number of patches applied to a server over a time frame, or even in summary?
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11 views

What means “removing packages from package profile” in up2date in RHEL?

What does "... removing packages from package profile: ['package1', 'package2']" mean in RHEL, in the /var/log/up2date log? I thought it was dependencies, but the software is still present.
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27 views

OpenVPN service on CentOS7

I installed openvpn through the RHEL repo on a CentOS 7 machine. Problem is openvpn is not installed as a service (ie nothing in /etc/init.d/ or available through systemctl). I could install from ...
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2answers
32 views

CentOS - how to look for dropped connections from NIC

I'm running CentOS 5 and sendmail. Sendmail serves as an MTA for a webserver on the same LAN segment. Most emails go through, but I do get several errors in /var/log/maillog that read: Oct 20 ...
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1answer
30 views

Why does my tunneled IPv6 connectivity drop after a short period of time?

I correctly setup a Hurricane Electric tunnel on a CentOS 6.5 VPS server (KVM). I use CSF (ConfigServer Security & Firewall) which acts as a wrapper for iptables and ip6tables, the default ...
2
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1answer
213 views

What is the purpose of avahi on a RHEL 7 server?

Running a server machine with CentOS 7, I've noticed that the avahi service is running by default. I am kind of wondering what the purpose of it is. One thing it seems to do (in my environment) is ...
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0answers
33 views

System not responding and ttyS0 (ttyS0) main process (1627) killed by INT signal

The system is not responding(Unable to do SSH or Telnet, even scheduled cron job is not running) if it runs for more than 5 days. The scenario is "the ssh session is opened and console is opened from ...
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1answer
31 views

Unable to Configure Quotas in RHEL6 & CentOS6- quotecheck returns error message

Unable to Configure Quotas in RHEL6 & CentOS6- quotecheck returns error message I've created new partition(/dev/sda6) and mounted it(on /hulk). Edited /etc/fstab file to give quotas on the ...
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0answers
20 views

How do I set kernel-ml default in CentOS?

I have installed kernel-ml package from http://elrepo.org/tiki/kernel-ml Now I have both the original CentOS kernel and kernel-ml. How do I set kernel-ml as default on boot? Thank you!
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1answer
93 views

IPTABLES comment: No chain/target/match by that name

Faced with error when adding new rule with 'comment': # iptables -I INPUT 1 --source 66.***.***.78 -j REJECT -m comment --comment "Some" iptables: No chain/target/match by that name. Without ...
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0answers
39 views

Ext3 file system became read-only and server reboots spontaneoulsy

We noticed ext3 file system in our CentOS 4.9 server became read-only. We got the following error in dmesg: EXT3-fs: INFO: recovery required on readonly filesystem. EXT3-fs: write access will ...
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1answer
92 views

How to expand an iSCSI lun with targetcli on CentOS7?

I have a CentOS 7 machine with iSCSI configured. see ls output from targetcli below. I want to add disk02 to lun0 so that to the iSCSI client can see a total 869.16GB instead of 392.2GB Question: Is ...
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0answers
115 views

Setting up a wireless connection on CentOS 6.5 without NetworkManager

I'm trying to set up a wifi connection from my CentOS 6.5 system to a wireless AP, without using NetworkManager. This is a fresh installation, but yet I don't see any ifcfg-* files in ...
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0answers
53 views

Show Plymouth Boot Screen failed

I am not getting proper information about how to solve this thing. I am using Centos 7 i've installed one open source called OpenERP. all services are running now. I have one issue i.e. ...