know the linux version

how to know the linux version.
for kernel level.
1) uname -a
2) to know the redhat version then use.
cmd : cat /etc/redhat-release.

Failed to connect to repository : Could not init /tmp/hudson

Failed to connect to repository : Could not init /tmp/hudson

1) There's no such executable git in PATH: /sbin, /usr/sbin, /bin, /usr/bin.
In the jenkins job section.
Advanced...
Source Code Management.
got git.
2) Failed to connect to repository : Could not init /tmp/hudson

solution : please install git(as below ) or provide the git exe file path (/usr/bin/git).  

Install git on linux.

command : sudo yum install git-all

ref : https://git-scm.com/book/en/v2/Getting-Started-Installing-Git

now check the git version.
cmd : git --version

Install maven on redhat linux

Install maven on redhat  linux

wget : to retrieve content from server

REF : maven mirror

1) wget http://mirror.olnevhost.net/pub/apache/maven/binaries/apache-maven-3.2.1-bin.tar.gz

1.1)
create the apache-maven if not exist.
command :
sudo mkdir -m a=rwx /usr/local/apache-maven

1.2) Go to apache-maven directory and execute the command.
maven

1.3) extract the file
command : tar xvf apache-maven-3.2.1-bin.tar.gz

1.4) export the path
1.4.1) export M2_HOME=/usr/local/apache-maven/apache-maven-3.2.1
1.4.2)export M2=$M2_HOME/bin
1.4.3) export PATH=$M2:$PATH

1.5) verify maven version
mvn -version

output :

Maven home: /usr/local/apache-maven/apache-maven-3.2.1
Java version: 1.8.0_45, vendor
Java home: /usr/java/jdk1.8.0_45/jre
Default locale:
OS name: "linux",

REF : 1) stackoverflow
           2) linux