I just found very good links where default Command mode can be converted into GUI mode during system boot.

refer – www.linuxtopia.org/online_books/rhel6/rh…ng-to-gui-login.html

Regards,
Rajesh Kumar
Twitt me @ twitter.com/RajeshKumarIn

The post Converting Red Hat Enterprise Linux booting from CLI to GUI appeared first on scmGalaxy.

Ignore existing files or update only newer files with rsynca

Copying from local to remote

Note that all the examples shown in the post are for copying files from the local computer to a remote server/computer.

Default behavoir

The following command will recursively copy all files from the local filesystem from /var/www to the remote system at 10.1.1.1. Note the following:

Any files that do not exist on the remote system are copied over
Any that have been updated will be copied over, although note that rsync is extremely efficient in that only the changed parts of files are copied and if the file is exactly the same if it is not copied over at all
Any that have been deleted on the local system are deleted on the remote
1 rsync -raz –progress /var/www 10.1.1.1:/var

Ignore existing files

Use the –ignore-existing flag to prevent files from being copied over that already exist on the remote server. By adding this, we eliminate behaviors 2 and 3 in the list above and all that is done is this:

Any files that do not exist on the remote system are copied over
1 rsync –ignore-existing -raz –progress /var/www 10.1.1.1:/var

Update the remote only if a newer version is on the local filesystem

In the case I was talking about, we didn’t want to overwrite any files at the other end. However you may want to copy files over the have been updated more recently on the local filesystem which is done with the –update flag. The behavior is now like this:

Any files that do not exist on the remote system are copied over
Any files that exist on both local and remote that have a newer timestamp on the local server are copied over. (Conversely, any files that have an older timestamp are not copied over).
1 rsync –update -raz –progress /var/www 10.1.1.1:/var

Use –dry-run to see what will be copied

It can be a good idea to test what will be transferred before actually doing it to make sure you aren’t going to copy files that you don’t want to. The –dry-run flag helps you do this:
1 rsync –dry-run –update -raz –progress /var/www 10.1.1.1:/var

Combined with the –progress flag I have included in all the examples, –dry-run will output all the directories it looks at and then all the files that would be copied.

Regards,
Rajesh Kumar
Twitt me @ twitter.com/RajeshKumarIn

The post Ignore existing files or update only newer files with rsync appeared first on scmGalaxy.

Issues

root@rkumar11-usa:~/data/share# sudo mount -t cifs //172.19.165.205/d /home/rkumar11/data/share --verbose -o user=rkumar11
mount: block device //172.19.165.205/d is write-protected, mounting read-only
mount: cannot mount block device //172.19.165.205/d read-only

Solution –

sudo apt-get install cifs-utils

Regards,
Rajesh Kumar
Twitt me @ twitter.com/RajeshKumarIn

The post Mount: cannot mount block device //172.19.165.205/d read-only appeared first on scmGalaxy.

wget -q -O – pkg.jenkins-ci.org/debian/jenkins-ci.org.key | sudo apt-key add –
sudo sh -c ‘echo deb pkg.jenkins-ci.org/debian binary/ > /etc/apt/sources.list.d/jenkins.list’
sudo apt-get update
sudo apt-get install jenkins

Regards,
Rajesh Kumar
Twitt me @ twitter.com/RajeshKumarIn

The post How to add new package to apt-get appeared first on scmGalaxy.

Error while doing ./configure during systemd-217 istall in RHEL 6.5

configure: error: *** ln doesn't support --relative ***

Regards,
Rajesh Kumar
Twitt me @ twitter.com/RajeshKumarIn

The post Error: *** ln doesn’t support –relative *** appeared first on scmGalaxy.

check “disable_ipv6″ file to check if IPv6 is disabled,enter:
[root@devops ~]# cat /proc/sys/net/ipv6/conf/all/disable_ipv6
0
if you get “0” value, it means that IPv6 is enabled and “1” means it is disabled.

How to Disable IPv6 in linux system?
vim /etc/sysctl.conf

Adding the below lines into that file:

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1

Save and close that file, then restart sysctl with the following command:

[root@devops ~]# sysctl -p

Now you can rerun the “ifconfig” command to check if IPv6 lines have been removed.

To Enabled IPv4

Edit “/etc/sysconfig/network-scripts/ifcfg-eth0″ file, which is your defualt first NIC configuration file.

If you are using DHCP server to take IP then, edit it like this;

#vi /etc/sysconfig/network-scripts/ifcfg-eth0

ONBOOT=”yes”
BOOTPROTO=”dhcp”

Save & restart networking service,

#service network restart OR
#/etc/init.d/network restart
Regards,
Rajesh Kumar
Twitt me @ twitter.com/RajeshKumarIn

The post Disable IPv6 and Enable IPv4 in Red Hat Linux appeared first on scmGalaxy.

1. How to send an email | check email | reply email attachment using command line??
2. How do you connect to the internet in linux?
4. How can i restrict a aceess of the file? (Add user, add group)

The post Answer some of Linux admin questions… appeared first on scmGalaxy.

How to Limit System Resources Using cgroups on CentOS 6?
Answer – Control groups, or cgroups

Great aricles –
www.digitalocean.com/community/tutorials…-cgroups-on-centos-6

Regards,
Rajesh Kumar
Twitt me @ twitter.com/RajeshKumarIn

The post How to Limit System Resources Using cgroups on CentOS 6 appeared first on scmGalaxy.

How to scheduling an automatic stop and restart the Cloud server every Saturday. We are using Windows 2012 server

-Saritha

rajeshkumar replied the topic: Automatic stop and restart the Cloud server

Please use following tutorials to do that….
www.howtogeek.com/123393/how-to-automati…dows-task-scheduler/

answers.microsoft.com/en-us/windows/foru…-375ce2647148?auth=1

The post Automatic stop and restart the Cloud server appeared first on scmGalaxy.

If your internet connection is behind a web proxy, you need to configure the following on your CentOS server:

System-wide proxy settings – add the following lines to your /etc/environment file:

# vi /etc/environment

http_proxy=”http://proxysrv:8080/”
https_proxy=”https://proxysrv:8080/”
ftp_proxy=”ftp://proxysrv:8080/”
no_proxy=”.mylan.local,.domain1.com,host1,host2″

To apply these settings without restarting the machine run the following commands on the bash shell:

export http_proxy="http://proxysrv:8080/"
export https_proxy="https://proxysrv:8080/"
export ftp_proxy="ftp://proxysrv:8080/"
export no_proxy=".mylan.local,.domain1.com,host1,host2"

You also need to configure yum:

# vi /etc/yum.conf

proxy=http://proxysrv:8080/

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#JRE8 - Package contains just the Java Runtime Environment 8
$ sudo apt-get install openjdk-8-jre

#JKD8 - Package contains just the Java Developement Environment 8
$ sudo apt-get install openjdk-8-jdk

#JRE8 - Package contains just the Java Runtime Environment 8
$ su -c “yum install java-1.8.0-openjdk”

#JKD8 - Package contains just the Java Developement Environment 8
$ su -c "yum install java-1.8.0-openjdk-devel"

$ wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/8u151-b12/e758a0de34e24606bca991d704f6dcbf/jdk-8u151-linux-x64.rpm"

$ wget -c --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-x64.rpm

curl -v -j -k -L -H "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-x64.rpm > jdk-8u112-linux-x64.rpm

$ wget --no-check-certificate -c --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u151-b12/e758a0de34e24606bca991d704f6dcbf/jdk-8u151-linux-x64.tar.gz

$ wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/8u151-b12/e758a0de34e24606bca991d704f6dcbf/jdk-8u151-linux-x64.tar.gz"

$ wget -c --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-x64.tar.gz

$ export JAVA_HOME=/opt/jdk1.8.0_144/
$ export PATH=/opt/jdk1.8.0_144/bin:$PATH;

#JRE7 - Package contains just the Java Runtime Environment 7
$ sudo apt-get install openjdk-7-jre

#JKD7 - Package contains just the Java Developement Environment 7
$ sudo apt-get install openjdk-7-jdk

$ su -c “yum install java-1.7.0-openjdk”

$ su -c “yum install java-1.7.0-openjdk-devel”

wget –no-cookies –header “Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com” “http://download.oracle.com/otn-pub/java/jdk/7/jdk-7-linux-x64.tar.gz”

wget –no-check-certificate –no-cookies –header “Cookie: oraclelicense=accept-securebackup-cookie” http://download.oracle.com/otn-pub/java/jdk/7u79-b15/jdk-7u79-linux-x64.tar.gz

curl -v -j -k -L -H “Cookie: oraclelicense=accept-securebackup-cookie” http://download.oracle.com/otn-pub/java/jdk/7u79-b15/jdk-7u79-linux-x64.rpm > jdk-7u79-linux-x64.rpm

The post Java Installation Process in Linux – Complete guide appeared first on scmGalaxy.

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Under Development

The post 20 Xargs Commands Examples in Linux / UNIX | Xargs Commands Tutorials appeared first on scmGalaxy.

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Download JIRA package from 

https://www.atlassian.com/software/jira/download?b=j

Linux Installation:

wget https://www.atlassian.com/software/jira/downloads/binary/atlassian-jira-6.4.12-x64.bin

chmod atlassian-jira-6.4.12-x64.bin

Execute the ‘.bin’ file to start the console wizard

stop iptables

service jira start/stop

http://uvo1kievugg76unbcj9.vm.cld.sr:8080/

& follow the instructions

Reference

https://confluence.atlassian.com/jira/installing-jira-on-linux-191501165.html

The post How to Install and Configure Jira in Linux | Jira Tutorial appeared first on scmGalaxy.

gsh – Run linux commands on many other linux server at once

Group Shell (also called gsh) is a remote shell multiplexor. It lets you control many remote shells at once in a single shell. Unlike other commands dispatchers, it is interactive, so shells spawned on the remote hosts are persistent.

GSH is a pluggable version of DSH (Distributed Shell) written in Python. Both a module and a command-line tool for running a shell command over multiple machines are included. GSH can be extended by adding new host loaders as well as hooking into various stages of the runtime.

It requires only a SSH server on the remote hosts, or some other way to open a remote shell.
gsh allows you to run commands on multiple hosts by adding tags to the gsh command.

e.g > gsh tag “remote command”

Important things to remember:
/etc/ghosts contains a list of all the servers and tags. gsh is a lot more fun once you’ve set up ssh keys to your servers

gsh [OPTIONS] SYSTEMS CMD…
SYSTEMS is a combination of ghost macros. See ghosts(1).

CMD is the command to run
-h, –help Display full help
-d, –debug Turn on exeuction debugging reports
-h, –no-host-prefix Does not prefix output lines with the host name
-s, –show-commands Displays the command before the output report
-n, –open-stdin Leaves stdin open when running (scary!)
-l, –user USER SSH’s to the host as user USER
-r, –run-locally Run commands locally (replaces $host with host)
-o, –self-remote Run locally instead of over SSH for local host
-V, –version Report the version and exit

You set up a /etc/ghosts file containing your servers in groups such as web, db, RHEL4, x86_64, or whatever (man ghosts) then you use that group when you call gsh.

How to run the gsh?
> gsh linux “cat /etc/redhat-release; uname -r”

You can also combine or split ghost groups, using cpanel+vps or web-RHEL4, for example.

Here’s an example /etc/ghosts file:

# Machines
 #
 # hostname OS-Version Hardware OS cp security
 linuxbrigade.com debian6 baremetal linux plesk iptables
 linuxbrigade.com centos5 vps linux cpanel csfcluster
 linuxbrigade.com debian7 baremetal linux plesk iptables
 linuxbrigade.com centos6 vps linux cpanel csfcluster
 linuxbrigade.com centos6 vps linux cpanel csfcluster
 linuxbrigade.com centos6 vps linux nocp denyhosts
 linuxbrigade.com debian6 baremetal linux plesk iptables
 linuxbrigade.com centos6 baremetal linux cpanel csf
 linuxbrigade.com centos5 vps linux cpanel csf

Reference url

http://www.linuxbrigade.com/run-the-same-command-on-many-linux-servers-at-once/
http://linux.die.net/man/1/gsh
https://github.com/gmjosack/gsh
http://outflux.net/unix/software/gsh/
http://outflux.net/unix/software/gsh/gsh.html

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