RHEL: Get yum "snapshot" and reuse

Is there a way to get a list of packages installed via yum, piped somehow into a list which can then be used on a different server to install the exact packages ?

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log32

you can certainly do that with shell scripting I guess.
List all installed packages with:

[COLOR=#333333]yum list installed[/COLOR]

you will get something similar to this:

zlib-devel.x86_64 1.2.3-3 installed
zsh.x86_64 4.2.6-5.el5 installed

with that output, you can simply take the first field with:

yum list installed | awk {'print $1'}

redirect it to a text file and run a for loop on it.
good luck

jibbajabba

log32 wrote: »

yum list installed | awk {'print $1'}

Thanks, that was the missing pipe-bit I was looking for.

A lot of people suggest yum-debug-**** and yum-debug-restore but for some reason yum-debug-restore is missing from yum-utils

yum list installed | awk {'print $1'} > installed.txt

then

yum -y install $(cat installed.txt)

worked like a charm - thanks for the hint !!

log32

nice to know it worked as expected

jibbajabba

You just have to be very careful with this. I blindly did that on a system now forgetting its on a different build ... (5.7 as opposed to 5.9) ..

Both really need to be on the same patch level - which might make it a little bit more difficult.

hiddenknight821

I was surprised the awk syntax Log32 used actually worked. I didn't believe it until I tested it. I prefer the single quote outside the bracelets, not within. This is what I see in most examples on the Net.

jibbajabba Can't you just update both systems to the latest patches?