CentOS – downgrade to the stable PHP version

everytime something like this happened to me (needing an older copy then what is in repo, or newer) I've found it easier to build my own RPM's from source, and i recommend doing that.

Its not too difficult, just a little more time consuming, and you can ensure your using the latest of everything ELSE on your system, and just the older (or newer) versions of PHP.

http://www.imminentweb.com/technologies/create-centos-php-rpm

should help you with the basics of building your own PHP RPM's on CentOS.

If you continue down the path your headed, your probably going to run into what I call "dependency hell" Old PHP needs old version of X, which is needed by a new version of Y, and if you want the old version of X, you need to downgrade Y as well, so on and so forth. 10-15 dependencies later, your running a reasonably insecure environment because a significant chunk of your system is running old code.

sed '/enabled=1/a\priority=10' /etc/yum.repos.d/epel.repo

Specify an in-place editing option (-i) if you want (makes the backup with .bak extension first):

sed -i.bak '/enabled=1/a\priority=10' /etc/yum.repos.d/epel.repo

Now i want use sed to do the following 1.Find the FIRST occurrence of worker_processes in that conf and replace text with worker_processes 4;

sed '0,/worker_processes [0-9]*;/s//worker_processes 4;/' /etc/nginx/nginx.conf

One last suggestion I used sed -i 's/enabled=0/enabled=1/g' /etc/yum.repos.d/remi.repo to change enabled=0 to enabled=1 under the [remi] section in remi.repo. However i have a feeling that it may modify all enabled=0 in that file , which will wreak the server.Can anyone suggest a better code

Here for you:

sed '/\[remi\]/,/enabled=0/ { s/enabled=0/enabled=1/ }' remi.repo

Another stuff i am not sure of:P I want to edit a file that has this as Text Testing = "0"(Yes it has quotes and i need to keep it) It should be modified from Testing = "0" to Testing = "1"(with quotes)

sed 's/Testing = "0"/Testing = "1"/g'

Also i need to add some text with quotes at the end of a file with sed Like "Thanks Quanta"(with quote) For php you put a \ with echoing quotes , don't know how it is done for bash

sed '$a"Werulz, you are welcome"\'

Another thing I need to modify a line in a conf but i don't remember what is the whole of text to replaced

Like its listen = something; , i want to modify it to listen = /tmp/php5-fpm.sock;

sed 's/listen = .*/listen = \/tmp\/php5-fpm.sock;/'