What is SELinux and how its SELinux used in Docker?

What is SELinux and how its SELinux used in Docker? There are three popular solutions for implementing access control in Linux: SELinux AppArmor GrSecurity Security-Enhanced Linux (SELinux) is a Linux…

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Configuring NFS to access the files from remote Linux machine as a mount point

I have a 2Tb of storage on a linux box, and i want to use that storage as a mount point from another machine. As a root user on the…

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How To scp, ssh and rsync without prompting for password using OpenSSH

Verify that local-host and remote-host is running openSSH ssh -V OpenSSH_4.3p2, OpenSSL 0.9.8b 04 May 2006 Lets say you want to copy between two hosts host_src and host_dest. host_src is…

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Linux User Management

ac Print statistics about users’ connect time. accton Turn on accounting of processes. To turn it on type “accton /var/log/pacct”. adduser Ex: adduser mark – Effect: Adds a user to…

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Basic RPM Tutorials

Basic RPM Tutorials Introduction: RPM is the RPM Package Manager. It is an open packaging system available for anyone to use. It allows users to take source code for new software and package…

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Good Links about Rsync

scmjobs created the topic: Good Links about Rsync samba.anu.edu.au/rsync/nt.html troy.jdmz.net/rsync/index.html samba.anu.edu.au/ftp/rsync/rsyncd.conf.html samba.anu.edu.au/rsync/features.html samba.anu.edu.au/rsync/examples.html en.wikipedia.org/wiki/Rsync

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Converting Red Hat Enterprise Linux booting from CLI to GUI

rajeshkumar created the topic: Converting Red Hat Enterprise Linux booting from CLI to GUI I just found very good links where default Command mode can be converted into GUI mode…

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Ignore existing files or update only newer files with rsync

rajeshkumar created the topic: Ignore existing files or update only newer files with rsync Ignore existing files or update only newer files with rsynca Copying from local to remote Note…

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Mount: cannot mount block device //172.19.165.205/d read-only

rajeshkumar created the topic: mount: cannot mount block device //172.19.165.205/d read-only Issues Solution – Regards, Rajesh Kumar Twitt me @ twitter.com/RajeshKumarIn

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How to add new package to apt-get

rajeshkumar created the topic: How to add new package to apt-get 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’…

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Error: *** ln doesn’t support –relative ***

rajeshkumar created the topic: configure: error: *** ln doesn’t support –relative *** Regards, Rajesh Kumar Twitt me @ twitter.com/RajeshKumarIn

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Disable IPv6 and Enable IPv4 in Red Hat Linux

rajeshkumar created the topic: Disable IPv6 and Enable IPv4 in Red Hat Linux Disable IPv6 and Enable IPv4 in Red Hat Linux check “disable_ipv6″ file to check if IPv6 is…

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Answer some of Linux admin questions…

scmuser created the topic: Answer some of Linux admin questions… 1. How to send an email | check email | reply email attachment using command line?? 2. How do you…

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How to Limit System Resources Using cgroups on CentOS 6

rajeshkumar created the topic: How to Limit System Resources Using cgroups on CentOS 6 How to Limit System Resources Using cgroups on CentOS 6? Answer – Control groups, or cgroups…

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Automatic stop and restart the Cloud server

pasupuleti2 created the topic: Automatic stop and restart the Cloud server How to scheduling an automatic stop and restart the Cloud server every Saturday. We are using Windows 2012 server…

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web-proxy-on-centos

How to Configure Web Proxy on CentOS | Tutorials | 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…

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proxy-configuratin-in-linux-and-windows

How to Set or Configure Proxy in Linux and Windows System? – scmGalaxy

Setting the proxy configuration in Linux and Windows If you use a proxy server or firewall, you may need to set the http_proxy environment variable in order to access some…

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java-installation-in-linux

Java Installation Process in Linux – Complete guide

Download, Install and Configure JDK 8 & JRE 8 Platfrom – Debian & Ubuntu Platfrom – Fedora, Oracle Linux, Red Hat Enterprise Linux, etc Platfrom – All platforms of Linux,…

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pmap-commands

20 pmap Commands Examples in Linux / UNIX | pmap Commands Tutorial

You can find the memory used by a program (process) by looking into /proc directory or using standard command such as ps or top. However, you must calculate all memory…

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mpstat-commands

20 mpstat Commands Examples in Linux / UNIX | mpstat Commands Tutorial

If you are using SMP (Multiple CPU) system, use mpstat command to display the utilization of each CPU individually. mpstat Report processors related statistics which includes Collecting and displays performance…

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20 iostat Commands Examples in Linux / UNIX | iostat Commands Tutorial

iostat command is a command that used for monitoring system input/output device loading by observing the time the devices are active in relation to their average transfer rates. The iostat…

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vmstat-commands

20 vmstat Commands Examples in Linux / UNIX | vmstat Commands Tutorials

vmstat – Report virtual memory statistics. vmstat is a tool that collects and reports data about your system’s memory, swap, and processor resource utilization in real time. It can be…

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xargs-commands

20 Xargs Commands Examples in Linux / UNIX | Xargs Commands Tutorials

Under Development The xargs command is extremely useful when we combine it with other commands.This tutorials explains the usage of xargs command using few simple examples. 1. Xargs Basic Example…

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partition-commands-in-linux-unix

20 Mount and Unmount Filesystem / Partition commands in Linux / UNIX

Once you create a partition, you should use mount command to mount the partition into a mount point (a directory), to start using the filesystem. You need to add the…

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gsh-run-linux-commands

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

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…

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linux-build-server

If a linux-build-server suddenly starts getting slow, what would you check?

If a linux-build-server suddenly starts getting slow, I would divide my approach / troubleshooting into 3 section as follows; 1. System Level troubleshooting a. RAM related issues b. Disk Space related…

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linux-commands-administrators

Linux Commands for Administrator | Linux Admin Commands Reference

su: Acquiring Superuser Status # su  :- Acquire  Superuser after entering password but home directory does not change # su – l :– Acquire Superuser access after password but home …

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Linux Commands for User | Linux User Commands Reference

General Commands Not Used Frequently cal – The Calender bc – The Calculator file – knowing the file types cmp – Comparing two files. comm – Common in two files…

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linux-performance-monitoring

Linux Performance Monitoring using iostat, mpstat and vmstat | Linux Performance Monitoring Guide

iostat reports CPU, disk I/O, and NFS statistics. mpstat reports processors statictics. vmstat reports virtual memory statistics. vxstat – This Utility can be used as well. iostat reports CPU, disk…

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linux-system-administrators-responsibilities

Main Responsibilities of the Linux System Administrator | What Linux System Administrators do ?

Main Responsibilities of the Linux System Administrator is as follows: Maintaining User Accounts Security Managing the disk space and Backup Provisiom the new Linux Server based on the need Linux…

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