Solved: Install and use rsync in Linux and Solaris – Tips and Tricks

rsync is a very useful utility which can be used to take backup or copy data from one filesystem to other. The best part with rysnc is that it considers incremental data while copying and syntax is easy.

rsync is popular with Linux and included in most versions by default. If you don’t have rsync in machine you can simply install it by following commands:-

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Ubuntu / Debian

sudo ap-get update
sudo apt-get install rsync

RHEL / CentOS

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yum install rsync

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Solved: How to use nmcli for adding new IP and managing network in Redhat Linux

In our last post we have seen how to use nmtui for network management. In this post we will see how to use nmcli for doing the same activity.

“nmcli” is a command line interface. Benefit with both nmtui and nmcli is that you don’t have to update the network configuration files manually. All the required changes are done by nmtui and nmcli themselves.

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Good thing with nmcli is that you don’t have to install any extra package like nmtui. nmcli is generally included with NetworkManager.

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In what sequence startup and shutdown RC scripts are executed in Solaris

We can use RC (Run Control) scripts present in /etc/rc* directories to start or stop a service during bootup and shutdown.

Each rc directory is associated with a run level. For example the scripts in rc3.d will be executed when the system is going in Run Level 3.

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What are the maximum number of usable partitions in a disk in Linux

Linux can generally have two types of Disks. IDE and SCSI.

IDE

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By convention, IDE drives will be given device names /dev/hda to /dev/hdd. Hard Drive A (/dev/hda) is the first drive and Hard Drive C (/dev/hdc) is the third.

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Solved: How to add swap space in Redhat or Ubuntu Linux

In this post  we will see how we can add a file as swap space in Linux. Same steps are to be followed for Redhat and Ubuntu Linux.

Type the following command to create 100MB swap file (1024 * 100MB = 102400 block size):

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dd if=/dev/zero of=/swap1 bs=1024 count=102400

Secure swap file

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