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51
Linux Servers Support / Re: Difference between major distros and why?
« Last post by brittocj on January 06, 2013, 01:10:54 PM »
 i want to know the technical differences between distros? Red Hat's network configuration files are in different directory than of Ubuntu, what controls this differences?

When booting any distro what are all files required?

After POST boot loader gets control and passes it to the default or selected kernel and loads kernel image and initrd images and then init process starts loading all services, is this the sequence of booting for all distros? After loading all services a login prompt is provided, when log in to the server the associated shell with the account opens and wait for commands.

So There is KERNEL > INIT > SHELL right then basically what is the difference?
52
Linux Servers Support / Re: Difference between major distros and why?
« Last post by dalek on January 06, 2013, 12:38:30 PM »
The difference depends on the distro.  I use Gentoo and have used it for years and have not messed with other distros to much, other than installing Kubuntu for my brother. 

As for config files, that is usually handled by the package manager.  The package manager is what actually installs files so the package manager does this by where the people developing the distro thinks it should go.  Once installed, there is sometimes a tool to config things or sometimes, it is done by hand. 

With Gentoo, we have a file called a ebuild.  That file tells the package manager what packages it depends on.  It also tells where files go during the install.  It also can set USE flags which changes how a program works or what a program supports.  Gentoo is a source based distro so it depends on the admin to set all this up before hand.  There is another set of files that the user can use to tweak these settings globally or even just for one package. 

A distro like Redhat doesn't give that sort of control.  When you install a package in Redhat, the people at Redhat have done most all that for you.  Basically, they enable most everything whether you need it or not, which is why some people use Gentoo.  At any rate.  Redhat is a binary based system.  Basically, it is faster to install but you have less control of options. 

You are right about the kernel.  Most all distros use the same kernel although some patch kernels in certain ways to either enable things, disable things or just add features that the distro needs. 

I don't generally get into the details of other distros.  I been using Gentoo for a long time but have used Mandrake way back.  I have installed Kubuntu and update it but not expert enough to tell you why they set things up the way they do.  I have found that every distro has something weird about it.  It never fails. 

 :)    :)
53
Linux Servers Support / Re: Difference between major distros and why?
« Last post by brittocj on January 06, 2013, 07:56:49 AM »
 Generally everyone will say the external appearance user interface differences, but what is the actual technical difference? Their kernel is same running shell interpreter is same but the commands and configuration file locations different for each distro why? and what reallly causes this difference? Is kernel or shell? i want to know the technical differences between distros? Red Hat's network configuration files are in different directory than of Ubuntu, what controls this differences?

tx
britto
54
Linux Servers Support / Re: Difference between major distros and why?
« Last post by dalek on January 06, 2013, 02:34:37 AM »
Each distro has some niche that is serves.  Some are bloated and want to be a drop in replacement for people switching from windows.  Some allow you to custom build everything from scratch.  Some are specifically for server or critical uses and others are trying to be bug free but move fairly quick with updates and point toward desktop uses. 

Redhat, mostly for servers but works for desktops too.  It is set up to be stable in a big way.  Less often updates but well tested and stable.  Also offers paid support if needed.

Mandriva, sort of like Redhat but not as stable and while it can be used for servers, it seems to be more desktop driven and the updates are faster. 

*ubuntu, designed for drop in replacement for people switching from windows.  I installed Kubuntu for my brother and he really can't tell much difference, other than no anti-virus. 

Gentoo, can be used for anything where you need serious control of the programs.  It can be used for servers or desktops depending how it is set up. 

The best place to read up on these is here:

http://distrowatch.com/

You can click on hundreds of distros and sort of get a idea what each ones can be used for. 

 :)    :)
55
Linux Servers Support / Difference between major distros and why?
« Last post by brittocj on January 05, 2013, 06:04:26 PM »
Hi,

What are difference between major server distros and what is the advantage?

Kernel (2.6) and bash (4.1) are same for Ubuntu and Red Hat only certain commands are different, file system structure is different and package manager ( deb and rpm) so which program makes this difference ? We cannot use yum and apt inter changeably, why?

thanks in advance.

britto
56
Linux Servers Support / How to Map AD groups to Samba share
« Last post by sunnysthakur on January 04, 2013, 06:42:25 AM »
I am setup a samba share server which is authenticating from Active Directory.

I am able to access the share with AD user but not able to access when group defined in "valid users" parameters.

below are the steps i performed.

In smb.conf

[global]
workgroup = QASLABS
password server = WIN-60I6H2BG237.qaslabs.net
realm = QASLABS.NET
preferred master = no
security = ADS
idmap backend = ad
idmap uid = 100-20000000
idmap gid = 100-20000000
winbind separator = +
template shell = /bin/bash
winbind use default domain = true
winbind offline logon = false
preferred master = no
server string = Linux Test Machine
encrypt passwords = yes
log level = 3
log file = /var/log/samba/%m
max log size = 50
printcap name = cups
printing = cups
winbind enum users = yes
winbind enum groups = yes
winbind use default domain = yes
winbind nested groups = yes
netbios name = smbad
hosts allow = 127.0.0.1 192.16.17.0/24
passdb backend = tdbsam
template homedir = /home/%U
winbind nss info = rfc2307

[Data]
[COLOR="RoyalBlue"]comment = Directory for storing Data
path= /opt/data
valid users = @NETWORK+itadmin NETWORK+testadmin
#valid users = @"QASLABS.NET\\itadmin"
writeable = yes
browseable=yes
create mask = 775
directory mask = 775
hosts allow = 127.0.0.1 192.16.17.0/24[/COLOR]

In /etc/nsswitch.conf

passwd: files winbind
shadow: files winbind
group: files winbind
hosts: files dns wins
bootparams: nisplus [NOTFOUND=return] files
ethers: db files
netmasks: files
networks: files
protocols: db files
rpc: files
services: files
netgroup: files
publickey: nisplus
automount: files
aliases: files nisplus

On executing the wbinfo -u i am getting the user list from AD

[root@smbad ~]# wbinfo -u
administrator
guest
krbtgt
testdev
testadmin
testhr
testqa
testit
testcmt
testsupp
testituser

On executing the wbinfo -u i am getting the user list from AD. But groups i created on AD is not displaying in this list [i.e itadmin]

[root@smbad ~]# wbinfo -g
BUILTIN+administrators
BUILTIN+users
SMBAD+itadmin
domain computers
domain controllers
domain admins
domain users
domain guests
group policy creator owners
read-only domain controllers
dnsupdateproxy
cert publishers
ras and ias servers
allowed rodc password replication group
denied rodc password replication group
dnsadmins
schema admins
enterprise admins
enterprise read-only domain controllers

Please help on how to map AD group to samba so that group permissions can be setup on samba
57
Linux Servers Support / FTP authenticate using LDAP
« Last post by zabidin2 on December 20, 2012, 05:51:56 AM »
Hi,

My client required to access FTP and authenticate using LDAP. Server using Centos 5.2 64bit(ZIMBRA LDAP) and Centos 6.3 (FTP). Ftp server and LDAP server is a separate server. Still investigate what wrong because in /var/log/message it not show any complete error . Here is diagram.

http://postimage.org/image/8i0ehgv3j

Hope you guy here can give some hint.

Thanks.
58
Linux Servers Support / Re: What are Inodes and how to increase them?
« Last post by sumit1203 on December 19, 2012, 10:10:41 AM »
If you are keeping huge number of small files in your disks, this may one day cause running out of available inodes because of which even though you might have sufficient disk space, file system cannot create new files. Lets see how it works in my 1GB disk partition.

The parameter “-i” allows us to play with the number of inodes we can have in a partition. It is called “bytes-per-inode”. The bigger it is less number of inodes you will have. I have set a relatively big size “163840″ bytes per inode and the result is I have 6768 inodes. What this means indeed is I can’t create more than 6768 file.

In order to increase the number of inodes, format the partition again and specify the size.

#mkfs.ext3 -i 163840 /dev/sdb1

In order to check,use the command:
#df -i

59
Linux Servers Support / Re: Linux Remote Installation
« Last post by itguy on December 14, 2012, 02:09:07 PM »
check out how to configure PXE server in Linux environment...
http://redhatserverconfiguration.blogspot.in/2012/12/pxe-server-configuration_12.html
60
Forum Suggestion & News / Unexpected forum downtime
« Last post by LS-Admin on December 14, 2012, 10:20:04 AM »
Dear members,

Recently LinuxSolved.com was not available for few hours , it was due to problem in current server however issue has been resolved. We have moved forum to a new temporary server and will monitor how it works here, if it is good then will remain on this server. If you faces any issue then let us know.

Thank you!
Admin
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