move doc to readme

README.md

@@ -1,33 +1,84 @@
-# Build OpenSSH RPM for Centos
+# Upgrade OpenSSH for CentOS
+
+---
+
+## Build RPMs
 
 ```bash
-yum install -y pam-devel rpm-build rpmdevtools zlib-devel openssl-devel krb5-devel gcc
+rhel_version=`rpm -q --queryformat '%{VERSION}' centos-release`
+version="8.0p1"
+yum install -y pam-devel rpm-build rpmdevtools zlib-devel openssl-devel krb5-devel gcc wget
 mkdir -p ~/rpmbuild/SOURCES && cd ~/rpmbuild/SOURCES
 
-wget -c http://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-7.7p1.tar.gz
-wget -c http://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-7.7p1.tar.gz.asc
+wget -c https://mirrors.tuna.tsinghua.edu.cn/OpenBSD/OpenSSH/portable/openssh-${version}.tar.gz
+wget -c https://mirrors.tuna.tsinghua.edu.cn/OpenBSD/OpenSSH/portable/openssh-${version}.tar.gz.asc
+wget -c https://mirrors.tuna.tsinghua.edu.cn/slackware/slackware64-current/source/xap/x11-ssh-askpass/x11-ssh-askpass-1.2.4.1.tar.gz
 # # verify the file
 
 # update the pam sshd from the one included on the system
-# the default provided doesn't work properly on centos 6.5
-tar zxvf openssh-7.7p1.tar.gz
-cp /etc/pam.d/sshd openssh-7.7p1/contrib/redhat/sshd.pam
-mv openssh-7.7p1.tar.gz{,.orig}
-tar zcpf openssh-7.7p1.tar.gz openssh-7.7p1
+# the default provided doesn't work properly on CentOS 6.5
+tar zxvf openssh-${version}.tar.gz
+yes | cp /etc/pam.d/sshd openssh-${version}/contrib/redhat/sshd.pam
+mv openssh-${version}.tar.gz{,.orig}
+tar zcpf openssh-${version}.tar.gz openssh-${version}
 cd
-tar zxvf ~/rpmbuild/SOURCES/openssh-7.7p1.tar.gz openssh-7.7p1/contrib/redhat/openssh.spec
+tar zxvf ~/rpmbuild/SOURCES/openssh-${version}.tar.gz openssh-${version}/contrib/redhat/openssh.spec
 # edit the specfile
-cd openssh-7.7p1/contrib/redhat/
+cd openssh-${version}/contrib/redhat/
+chown root.root openssh.spec
 sed -i -e "s/%define no_gnome_askpass 0/%define no_gnome_askpass 1/g" openssh.spec
 sed -i -e "s/%define no_x11_askpass 0/%define no_x11_askpass 1/g" openssh.spec
 sed -i -e "s/BuildPreReq/BuildRequires/g" openssh.spec
 #if encounter build error with the follow line, comment it.
 sed -i -e "s/PreReq: initscripts >= 5.00/#PreReq: initscripts >= 5.00/g" openssh.spec
+#CentOS 7
+if [ "${rhel_version}" -eq "7" ]; then
+    sed -i -e "s/BuildRequires: openssl-devel < 1.1/#BuildRequires: openssl-devel < 1.1/g" openssh.spec
+fi
 rpmbuild -ba openssh.spec
+cd /root/rpmbuild/RPMS/x86_64/
+tar zcvf openssh-${version}-RPMs.el${rhel_version}.tar.gz openssh*
+mv openssh-${version}-RPMs.el${rhel_version}.tar.gz ~ && rm -rf ~/rpmbuild ~/openssh-${version}
+# openssh-${version}-RPMs.el${rhel_version}.tar.gz ready for use.
+```
+
+---
+
+## Update with RPMs
+
+```bash
+cd /tmp
+mkdir openssh && cd openssh
+timestamp=$(date +%s)
+if [ ! -f ~/openssh-${version}-RPMs.el${rhel_version}.tar.gz ]; then 
+    echo "~/openssh-${version}-RPMs.el${rhel_version}.tar.gz not exist" 
+    exit 1
+fi
+cp ~/openssh-${version}-RPMs.el${rhel_version}.tar.gz ./
+tar zxf openssh-${version}-RPMs.el${rhel_version}.tar.gz 
+cp /etc/pam.d/sshd pam-ssh-conf-${timestamp}
+rpm -U *.rpm
+mv /etc/pam.d/sshd /etc/pam.d/sshd_${timestamp}
+yes | cp pam-ssh-conf-${timestamp} /etc/pam.d/sshd
+#sed -i 's/#PermitRootLogin yes/PermitRootLogin yes/g' /etc/ssh/sshd_config
+if [ "${rhel_version}" -eq "7" ]; then
+    chmod 600 /etc/ssh/ssh*
+    systemctl restart sshd.service
+else
+    /etc/init.d/sshd restart
+fi
+cd
+rm -rf /tmp/openssh
+echo "New version upgrades as to lastest:" && $(ssh -V)
 ```
 
+---
+
+More information please refer `build-RPMs-OpenSSH-CentOS.sh` script.
+
+The [release page](https://github.com/Junyangz/upgrade-openssh-centos/releases) has some RPMs that I built, feel free to use it.
+
 ## Reference
 
 [Build OpenSSH RPM for Centos](http://www.arvinep.com/2015/12/building-rpm-openssh-71p1-on-rhelcentos.html)
-
 [gist](https://gist.github.com/tjheeta/654a246d18fea65b2da0)