Tracing down all the service info on a LINUX system ???

Hello Experts,

I got this production server to manage and I'm planing to deploy a new identical server and discontinue with the existing one.

But I'm confused to understand and trace current service versions and all inside this BOX. This is highly customized server. Can you help me with commands to identify below services versions and further more details ?

Apache
PHP
MySQL
Ruby on Rails (Rakefile.rb file are running)
etc..

Thanks a lot for time !
 
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Shakthi777Asked:
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Monis MontherConnect With a Mentor System ArchitectCommented:
For apache try

httpd -v

I would check for all system packages that are installed. Under debian you can check this info from dpkg command. Sorry but I am not very experienced with dpkg. But I know you can do something called dselect and you can get a full list of everytihng installed and export this list to the new server and have  them all installed from the debian repos by using apt-get.

I would check

1- Kernel and Arch
2- Disk size and partitioning
3- Memory and CPU info
4- Packages installed and their versions
5- User accounts
6- Data size
7- FIrewall rules if any apply
8- Ask the last system admin that was working on this server for any specific info or unusual things he had working that might not appear from simple tests on the server
9- Check what scripts are running if any (You have to check logs, search the system or ask as they dont have a specific place)
10- Check the cron system for any system crons.
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tsteensCommented:
Apache: httpd -V
PHP: php --version
MySQL: mysql --version

I'm not sure about Ruby, but the man pages will probably help you. Usually there are either a -V or --version switch to tell you versions.

There might be a lot of dependencies as well. You could use ldd to somehow track those, but that is no guarantee that you will catch them all. Many of the popular Linux distros uses package managers to handle dependencies. What kind of system are you? What kind of information to you need, if any, apart from what you get from my suggestions above?
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Monis MontherConnect With a Mentor System ArchitectCommented:
Is this RHEL/CentOS/Fedora or Ubuntu/Debian or something else

From your post I  can see its debian

To find disk size and paritions

fdisk -l

and

df -h

To find Memory info

free

For Versions

php -v  (This  will give you php version)
mysql -V (This is an upper case V and will give you mysql version)
apache2 -v (This will give you apache version)

Dont forget to check kernel and architecture

uname -a

Record all this information. Good Luck
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Shakthi777Author Commented:
thanks  alot !

user1@16438-39591:~$ apache2 -v
-sh: apache2: command not found

when we deploying a identical second server, what are the other information we need ? except application data and the DBs ?
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tsteensCommented:
If you do not have apache2 available. Use httpd -V as I said earlier. Be sure to use capital V. What kind of system are you on?
Deploying an identical server could be very hard because that would include making sure everything is in the exact same version. However from what you hav given so far this seems to be a web server. As long as you get the versions for php, mysql, apache and any other package you use (frameworks, ruby) right you shouldn't have any problems if you use a package manager such as yum or aptitude. Make sure to copy all configuration files though. They should be in your /etc directory.
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mccrackyConnect With a Mentor Commented:
for debian, you can also get a listing of what all packages are installed on the system with

dpkg -l

you can pipe it into a file for reference for when you set up the new system.
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Shakthi777Author Commented:
something happened when I'm trying to assign points and it's now in close mode. ???
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Shakthi777Author Commented:
tnx !
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