Linux Essentials for DevOps | ifconfig, ping, netstat, traceroute Commands | Shell Script Tutorial
Linux Essentials for DevOps | ifconfig ping netstat traceroute commands | Shell Script Tutorial
hostname
server1.in.ibm.com ---- FQDN - Fully qualified domain name
server1.us.ibm.com
server1 --- short name
ssh -l root server2
1) ping server2.in.ibm.com
ping 10.0.1.2 -- to check weather the remote machine is alive
2) netstat -na -- to list out the ports on which application listening
jenkins -- 8080
nexus -- 8081
3)
server1 --- n/w switch -- router -- n/w switch2 -- router2 -- server2
traceroute 192.168.100.101
dpkg -l | grep -i ssh
extension of a package on ubuntu?
chef-12.1.x86_64.deb --
dpkg -i chef.deb
rpm -ivh chef.rpm
chef.rpm --- ruby
abc -- def -- xyz -- gh
rpm -ivh gh.rpm
rpm -ivh xyz.rpm
rpm -ivh def.rpm
rpm -ivh abc.repm
abc -- 1 -- a b c
---2 -- d e f
--3 -- x y z
tools to install the packages / dempndencies
centos/redhat/fedora == yum
ubuntu == apt -get
yum install chef = 100 packages
apt -get install chef
server1 -----------------yum install -y chef -- downloads - installs
repository configuration
rhel/centos/fedora -- /etc/yum.repos.deb
ubuntu -- /etc/apt/sources.list
apt -get install ansible
apt -get install -y ansible
iso -- installattion media
shell properties
-----------------
control+A -- to go to beginning
Control+E -- to go to end
Control+w -- to remove a word
Control+u -- to clear the line
Tab -- auto fill
Control+ R -- Reverse search
mount
------
data center -- 100 machines
ansible
1 server --
1) download ansible
ansible.rpm
rpm -ivh ansible.rpm
2) log files
100 -- /var/xyz.log
space is not available
nfs server -1
nfs -- network file sharing
100 machines
100 gb
10 people -- 10 laptops -- movies / music
1 - 1 tb
nfs - 100 tb mounted nfs server over the internet
map drive
C
D
Z
2 - 100 gb
3 - 500 gb
-
-
10
11 server 100 tb- nfs server -- movies/music
mount - attach
umount - detach
1) 100 server
1 nfs to all 100 servers mount nfs server
mount nfsserver:/b /a
/a local directory
/b -nfs server
epel.repo --
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