What Does Core Mean

I need to send mails from our centos server, what are tools required ?

server
CentOS release 6.5 (Final)

How to check if sendmail is installed and configured?

I even tried mutt, I could install but not able to send mails. Is there any configuration required ?

I had used CentOS 6.6(desktop) before now install centos 7(desktop) on my pc.
In centOS 6.6 had “Connect to Server” in the Places menu, select “Public FTP” or “FTP (with login)” as the service type, enter the server name and other parameters (you can define bookmarks in this dialog box too),

But I cannot find it on centOS 7.I need to login Ftp via Connect to Server.

I just download the below files and tried to install it to virtualbox .

CentOS-7.0-1406-x86_64-DVD
CentOS-7.0-1406-x86_64-Everything


When it is booted to the DVD , it pop the below messages .

============================================
Install CentOS 7
Test this media & install CentOS 7
Troubeshooting

Press Tab ...
============================================

I tried to select any option , but the screen become dark , it seems the installation process is stopped ,

I tried Centos 5.x , it works fine , but Centos 7 not work.

would advise what is wrong ? thanks

Hello

I try to install the epel repository so I can install ejabberd.

I do not have epel, it seems :

Code:

[root@serv src]# ls /etc/yum.repos.d/
CentOS-Base.repo  CentOS-Debuginfo.repo  CentOS-fasttrack.repo  CentOS-Media.repo  CentOS-Vault.repo  n2.repo

So I try to install epel :

Code:

[root@serv src]# rpm -Uvh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
Retrieving http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
Preparing...                ########################################### [100]
	package epel-release-6-8.noarch is already installed

But when I try to install ejabberd :

Code:

[root@serv src]# yum install ejabberd
Loaded plugins: downloadonly, fastestmirror
Setting up Install Process
Loading mirror speeds from cached hostfile
 * base: ftp.nluug.nl
 * extras: ftp.nluug.nl
 * updates: ftp.nluug.nl
No package ejabberd available.
Error: Nothing to do

Something is wrong with epel.

I use Centos 7 and have just installed vsftpd to the server , I want to start vsftp service after install , when I tried the command "systemctl |grep vsftp" , it show nothing .

I use previous , all services keep at /etc/rc.d/init.d , what I need to do is /etc/rc.d/init.d/vsftpd start .

Please advise what I need to do for Centos 7 to start vsftpd ?

thanks

useradd -s /bin/bash -d /home/jaydul -m jaydul
[root@tuhin /]# cat /etc/passwd
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin
lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin
sync:x:5:0:sync:/sbin:/bin/sync
shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown
halt:x:7:0:halt:/sbin:/sbin/halt
mail:x:8:12:mail:/var/spool/mail:/sbin/nologin
operator:x:11:0perator:/root:/sbin/nologin
games:x:12:100:games:/usr/games:/sbin/nologin
ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin
nobody:x:99:99:Nobody:/:/sbin/nologin
dbus:x:81:81:System message bus:/:/sbin/nologin
sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin
jaydul:x:1000:1000::/home/jaydul:/bin/bash
[root@tuhin /]# cat /etc/redhat-release
CentOS Linux release 7.0.1406 (Core)

jaydul:x:1000:1000::/home/jaydul:/bin/bash

Why 1000:1000: Group? it will be by default will be 500:500?
I was any mistake?
jaydul:x:500:500::/home/jaydul:/bin/bash

Hello guys, I am new to using Linux and trying to setup telnet server on CentOS 7. After installing with "yum install telnet telnet-server".
I tried editing the /etc/xinetd.d/telnet file which I could not find. Please what am I not doing right?

I'm trying to send all root's mails to an external e-mailaddress, but for some reason I can't get it to work.

I've edited /etc/aliases with the following rule:

root: <myexternal@email.address>

and run newaliasses after, which would run without any errors.

I can run: echo "Testing" | mail -s "Server Testing" <myexternal@email.address>
just fine without any issue and it's being delivered correctly to my external address.

But when I run: echo "Testing" | mail -s "Server Testing" root

I (first) get a "Deferred: 451 Temporary local problem - please try again later" error and when I then run: "Sendmail -OTimeout.hoststatus=0m -q -v" to flush the mailqueue it says everything is ok, but I then get a message saying I have new mail in /var/spool/mail/root and I don't get the mail on my external e-mailaddress.

I have no clue where to look next, hopefully you guys can point me in the right direction.

Just for completeness: I use mageia release 4 (x86_x64).

Hello Experts,
I would like to create a server which can act as a YUM repository of Oracle Linux 6.5 and CentOS 6.5. Also I would like other servers to access this repo via http. I am stucked here to understand how I can bring all "RPMs" in to "/repo/OracleLinux/OEL6/current/x86_64" and always keep it updated. I would appreciate any help on this.
Thanks In Advance

I want to know the approximate maximum memory usage by my process. If I start the process using "time -v <myprocess>", I get the output after it terminates. This works fine in RedHat Enterprise Linux, but not in Centos. There does not seem to be an option "-v" for time. Do I miss anything ? What is the equivalent in Centos to know the peak memory usage by a process ?