This is a very short version for creating RPM’s.
# Building a RPM pipeline
[*] Get RPM development packages
[*] setup RPM build environment
[*] Create a signing GPG key
[*] get a source package from somewhere
[*] create a spec file
[*] build the rpm
## Get packages (as root)
yum install -y rpm-build rpm-devel rpmlint rpm-sign rpmdevtools tree
## setup the develop tree (as student)
rpmdev-setuptree
## create RPM signing GPG key
sudo rngd -r /dev/urandom # making sure the system generates entrophy
gpg –gen-key
-> option 1: RSA and RSA (default)
-> 2048 bit
-> 0 (no expiration)
-> user name
-> user email
-> some comment
-> passphrase : secretpass123
### Copy GPG key to rpmmacros file for this user
echo ‘%_gpg_name XXXXXXXX’ >> ~/.rpmmacros
## Export GPG Key
### get the fingerprint for the GPG key just created
gpg –fingerprint
### export to a file where XXXXXX is the 2e part of the public id (2048R/*B1979661*)
gpg –export –armor XXXXXXX > GPG-RPM-XXXXXXX
### Import on another system or in another keyring with
rpm –import GPG-RPM-XXXXXX
## get a source package from somewhere
## Download practice package
wget http://your-url-here/example.1.0.tar.gz
## list content of the package
tar -tf example.1.0.tar.gz
## create a spec file
vim rpmbuild/SPECS/example.spec
## build the rpm
rpmbuild -ba rpmbuild/SPECS/example.spec
### and resolve any issues (rinse and repeat)
## Sign the package and send it into the world
## because you added your GPG key to your keyring and to your .rpmmacros file, you dont need to specify
## the gpg key used for signing
cp rpmbuild/RPMS/x86_64/example-1.0-1.el7.x86_64.rpm .
rpmsign –addsign example-1.0-1.el7.x86_64.rpm
