CentOS 5 :: Services That Can Be Safely Turned Off

Apr 4, 2011

I am building CentOs servers on a regular basis.The last one was to be barebones with services. I wasn't sure which ones to turn off in "Setup".I Googled My dilemma and got conflicting info (Imagine that!) The customer complained of too many things running.

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Debian Configuration :: Services That Can Be Safely Disabled With Systemctl

Jul 22, 2015

Have been working most of the day on this usb full install (Jesiie xfce) trying to make it leaner/faster and trying to get rid of minor annoyances like "watchdog: watchdog0 is not shutting down" (couldn't btw), finally managed to disable "You have mail" by commenting out "session optional pam_ mail.so standard" in /etc/pam.d/login. Every little change registers in terms of seconds of boot time saved and how the system responds because, well, i'm booting from a usb 2 drive.Followed some suggestions from "Reduce Debian", removed cups-common, some foreign language locales and man pages. what i can safely do with systemctl.

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Ubuntu Security :: Difference In The Output Of A Port Scan Using Zenmap On The Same System With UFW Turned Off And Then With It Turned On

Feb 16, 2010

This is the difference in the output of a port scan using Zenmap on the same system with UFW turned off and then with it turned on. It is obvious that UFW works.

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Ubuntu Networking :: Wireless Switch Can't Be Turned On Again After Being Turned Off

Feb 2, 2010

The wireless connection works fine. The wireless switch automatically turns itself on every time I start the computer. However, after turning it off, I can't ever turn it on again unless I restart the computer. And because of this, the wireless connection is disabled until the next time I start the computer.I don't think this is a hardware problem because the switch can be turned on and off, although not in the way I expect.

I'm using ubuntu 9.10 on an Acer Aspire 4740G. The command [lspci | grep Network] shows Atheros Communications Inc. AR928X Wireless Network Adapter (PCI-Express) (rev 01). the [rfkill list] command shows (when the switch is on)

0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no

and, as expected, shows (when the switch is turned off)

0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: yes

I just want to be able to turn the switch on or off at any time I want as long as the computer is still on.

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CentOS 5 :: How To Remove Xen Kernel Safely

Jun 2, 2009

I am currently running the xen (64 bit) kernel, but want to move to the non xen kernel(64 bit) while retaining my carefully crafted system. I tried this once before by unticking the "virtualisation" and it removed the xen kernel, leaving me with nothing to boot from.

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CentOS 5 :: Get Numlock To Get Turned On Before Login

Feb 10, 2010

I am running Centos 5 as a server(runlevel 3) without a GUI. Purely Text Interface. The GUI is not even installed.

trying to get numlock to get turned on before login,preferably at GRUB but at least before the login prompt. I have tried numlockx but as I have no GUI it does not work. How do I do this?

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CentOS 5 :: Lenovo 5.6t400 - Can't Get The Wireless Turned On

Aug 25, 2011

Just loaded Centos 5.6 on my old Lenovo t400. Works great with on exception. Can't get the wireless turned on. It's an Intel PRO/wireless 5100 AGN (shiloh).

The external switch is on. FN+F5 does nothing.

It's in the device list but does not appear in Network Connections.

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CentOS 5 :: Major Upgrades Safely Using Logical Volumes?

Sep 9, 2009

Does everybody do major upgrades in place on production servers?Am I over-engineering by creating a new logical volume, syncing my working root volume to it and upgrading the new volume to test services? Then, after a week or 2 or 4, removing the old LV...

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CentOS 5 :: Start A Virtual Machine (VB) When Server Is Turned On?

Apr 7, 2011

I need start a virtual machine (Virtual Box) when when my server centos is turned on or start.

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CentOS 5 :: Starting RSHD Services On Centos 5,3 Box

Dec 18, 2009

I need to copy files over from a Solaris 2.6 box to my machine running Centos 5.3. I have to use RCP since the Solaris box is so old that is the only inter-machine copy command available.How do I enable rshd services on my centos box? Detailed explanation would be apperciated since I am from the ssh generation.

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CentOS 5 :: AFS RPM Not Installed But Ports Used By Services

Oct 7, 2009

I made an standard CentOS 5.3 installation and I didn't install any AFS (Andrew File System) rpm or did any AFS configuration or any additional rpm, but I was going to use several ports between 7000-7009 and then realised that those ports were being used by afs3-* services as for instance, asf3-kaserver (kerberos authentication, which I didn't installed either). I wish to disable or uninstall those services but I don't know how and didn't find too much information about it. Why are those services appearing there?

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OpenSUSE :: Dolphin Services - Get Mount / Umount Option Under Right Click Services Menu

Dec 7, 2010

So I want to get mount/umount option under right click services menu. I went to Dolphin -> Settings -> Configure Dolphin -> Services -> Download New Services and from there I installed KDE CDEmu Emulator and MountISO. But neither of them is showing up in actual context menu. Neither in Dolphin -> Settings -> Configure Dolphin -> Services for that matter. I tried to install them as normal user and as a root. I went to have a peak in /usr/share/kde4/services/ServiceMenus/ but they aren't there as well... It's just me or lots of things seems to be not quite working in 11.3?

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CentOS 5 :: PC / Desktop What Services To Stop And Uncheck?

Jul 29, 2009

Just installed 5.3/gnome.I am on pc/desktop with only wired internet connection via routerto dsl-modem. The OS sets-up the "eth0" automatically.For just this type of setup what services can I disable and uncheck ? In System>Admin.>Services I unchecked and disabled bluetooth,isdn,pcscd and sshd. Should I disable sendmail, avahi-daemon, portmap,rpcidmapd,rpcgssd and.apmd(no laptop)? Goal is to minimize unneeded services and improve security. The wiki article on securing CentOS did not cover this.Under System>Security Level Configuration I allow ftp,Mail(smtp), and WWW(HTTP). Is the ftp allowed ok for my pc/desktop?

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CentOS 5 Server :: Cannot Run Samba - Not Listed In Services

Oct 16, 2009

I recently installed CentOS 5.3. There I select desktop package (Gnome and KDE) didn't select server in CentOS 5.3 installation gui. I want to connect to the windows active directory domain in our company. To do this I want to run the samba service. But it is not listed in the services. (#service --status-all) but I cant see the samba config file smb.conf why I cant run this other services smbd, nmbd is also not listed. But winbind is listed and I started it.

[root@bryan-adams etc]# yum list samba
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: ftp.iitm.ac.in
* updates: ftp.iitm.ac.in
* addons: ftp.iitm.ac.in
* extras: ftp.iitm.ac.in
Available Packages
samba.i386 3.0.33-3.7.el5_3.1 updates

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CentOS 5 :: How To Add Portmap And Nfslock Services To Rc.local

May 27, 2011

I need to run portmap and nfslock service automatically at system start: $ sudo vim /etc/rc.conf. So i should add portmap and nfslock services to the DEAMONS list in the /etc/rc.conf(/rc.local).Can anyone please help me to add portmap and nfslock services to rc.local?

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CentOS 5 :: Entering GUI After Smartd Services Started

Jun 15, 2011

Why after I boot from runlevel 5 and smartd services is started, I've got a black screen. I know that the GUI is exist but it looks like doesn't appear (black screen). I do following actions :
1. First I check /etc/sysconfig/desktop there is no data (empty), then I add to /etc/sysconfig/desktop this line :
DESKTOP=GNOME
DISPLAYMANAGER=GNOME

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General :: How Can Vsftpd Services & Xinetd.d Services Can Be Differentiated

Sep 13, 2010

How can Vsftpd services & Xinetd.d services can be differentiated?

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CentOS 5 :: Unable To Enter In GUI After Smartd Services Started

May 13, 2011

I need help for analyzing why after I boot from runlevel 5 and smartd services is started, I've got a black screen.I know that the GUI is exist but it looks like doesn't appear (black screen).I do following actions : 1. First I check /etc/sysconfig/desktop there is no data (empty), then I add to /etc/sysconfig/desktop this line :

DESKTOP=GNOME
DISPLAYMANAGER=GNOME

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Server :: Start Services Without User Login - Centos 5.5?

Oct 4, 2010

I installed Centos 5.5 on a home PC to be used remotely.

All server daemons work fine but only start if the user is logged in.

How do I set the SSH server to start whenever the PC is turned on, rather than when the user is logged in? I read the chkconfig man page online but couldn't find anything.

Plus I put a script in my startup services to be run whenever the computer boots (I'm guessing when the users logs in). How do I go about setting that to run too whenever the system boots instead?

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CentOS 5 Server :: Integration Services Hyper-V (Error 2)

Nov 4, 2010

I've installed CentOS 5.x (64 bit) on a Hyper-V Server R2. When I trying to install integration serices I get an error:
[root@localhost ~]# cd /opt/linux_ic_v21_rtm/
[root@localhost linux_ic_v21_rtm]# make
Building all modules...
make -C /lib/modules/2.6.18-164.el5/build SUBDIRS=/opt/linux_ic_v21_rtm/src modules
make: *** /lib/modules/2.6.18-164.el5/build: No such file or directory. Stop.
make: *** [all] Error 2

I am using:
Linux localhost.localdomain 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
I did everything as it shows on [URL].

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CentOS 5 :: Httpd Services Dead But Subsys Locked

Nov 12, 2010

I have centos 5.5 64bit installed. When I start the httpd service I get the above message. The message is bogus because the server is running and web pages work. Is there a fix out there to resolve this?

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CentOS 5 Server :: Disable Unwanted Services In Other Than Squid?

Mar 5, 2011

I have installed squid using CentOS 5. The server is dedicated only for squid proxy server. I want to know how can I disable unwanted services which load at booting time. Like sendmail,samba,etc etc. These services take memory and are not in use. I does not know how can I make my server only for squid proxy service by removing unwanted services?

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CentOS 5 :: Solution Cluster Fail To Start Virtual Services After Upgrade To 5.5?

May 16, 2010

After upgrading Centos 5.4 cluster nodes to 5.5 all virtual services failed to start. All virtual services are marked as 'failed'. The reason: new /usr/share/cluster/vm.sh requires 'which', but this is not reflected in rgmanager-2.0.52-6.el5.centos.

Solution: run 'yum -y install which' on all nodes, and reboot cluster. Hope that will save somebody hours of downtime.

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CentOS 5 Server :: Connect With SMTP / IMAP And POP3 Using Email Services?

Oct 2, 2010

Having my Diploma Final Project on setting up a virtual mail server within Local Area Network (LAN) only. I had follow this how-to [URL] and complete up to squirrealmail web mail. I added two new user to try on sending and receiving mail. It works. I run CentOS on VMplayer. I using my laptop to do all the stuff, the laptop default OS is windows 7, I install VM player on it and run CentOS inside the VM Player.

I want to do testing on Windows 7 side by installing Thunderbird email client program, I want to connect to mail server with SMTP, IMAP/POP3 using the email service. I have problem while setting up user account on Thunderbird, Thunderbird seems like cannot detect my CentOS mail server. How? Do I have to do any other configuration on CentOS? Any DNS? Port number for IMAP, POP3 or SMTP?

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CentOS 5 Server :: Show All Services Running / Installed In The Command Line?

May 6, 2011

Howto show all services running/installed in the command line under Centos 5.6 Server?

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General :: Services Work Nicely With Connection Tracking - Port Range For Centos?

Dec 18, 2010

On my CentOS 5.4 box I run dns, ssh, and smtp servers. This box also has to be able to resolve and browse websites. So basically it needs iptable rules for

TCP 22 25 80 443
UDP 53

My question is, which of these services work nicely with connection tracking? I'm a little confused about how connection tracking works. For example say this iptables rule for smtp

Code:
iptables -A INPUT -s 0/0 --sport 513:65535 -d $myip --dport 25 -j ACCEPT
versus

Code:
iptables -A INPUT -s 0/0 --sport 513:65535 -d $myip --dport 25 -m state --state NEW,ESTABLISHED -j ACCEPT
So with connection tracking what exactly does it do that my first iptables rule does not do?

Also for centos is that port range correct? 2.6 Linux kernel randomly chooses a port 513-65535 when it connects to an external smtp server or say browses a site.

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CentOS 5 Server :: LDAP Client - Nss_ldap: - Authenticate SSH And Sudo And Not Services Like Httpd - Nrpe - Xinetd

Aug 9, 2011

When ever I have an issue with our LDAP server (which I was able to fix) we see the following errors in /var/log/messages and it causes problems with our services running on that box, e.g. httpd, nrpe, xinetd, etc. Aug 8 17:44:42 hostname httpd: nss_ldap: failed to bind to LDAP server ldap://serveraddress/: Can't contact LDAP server Aug 8 17:44:42 hostname httpd: nss_ldap: reconnecting to LDAP server (sleeping 64 seconds)... I am only wanting to authenticate SSH and Sudo and not services like httpd, nrpe, xinetd etc.

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OpenSUSE Install :: "System Services (Runlevel)" Deos Not List Any Services On 11.3?

Oct 21, 2010

I can see this phenomenon on 2 different systems running 11.3 .In simple mode and also in expert mode.

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General :: Terminal Command / Centos Server Starts Mysqld, Httpd And Ftpd Services At Boot Time Automatically?

Dec 27, 2010

Can anyone tell me what command can be used so that the Linux Centos Server starts mysqld, httpd and ftpd services at boot time automatically?

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CentOS 5 Server :: Start Nfs Services And Get Error "Starting NFS Daemon: [FAILED]"

Aug 29, 2011

When I want to start nfs services ,I get this error, Starting NFS daemon: [FAILED]

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