It is used to show that which file is open by which process. In this article, you will learn that how to use lsof command.

Some useful command are as below:

If “lsof” is not working on your system, simple run below command in order to install it.

yum install -y lsof

1- List all open files

run following command to list all open files.

lsof

Command: The name of the command associated with the process that opened the file.
PID:           Process ID of the process that opened the file.
TID:           Task or thread Identification number. if its blank it means, it is not a task. it is a process.
User:          User ID or the owner name of the process.
FD:            Shows the file descriptor of the file.
Type:         type of node associated with the file.
Device:      Contains device numbers.
Size/Off:   Shows the size of the file in bytes.
Node:        Shows the node number of a local file.
Name:       Shows the name of the mount point and file system on which the file placed.

Show Files Opened By a User

So, below command will show the list of all opened files of user “osradar”

lsof -u osradar

Print all Network Connections

lsof -i

See files based on IPv4 Address

lsof -i 4

list files based on IPv6 Address

lsof -i 6

List Processes of TCP Specific Port

To show all running process of a specific port, use -i option with lsof command. In below command we will show running process of port 22

lsof -i TCP:22

List Processes of TCP Ports range

Below command will show you all the files processes from port 1 to port 1024

lsof -i TCP:1-1024

See who is Looking What Files and Commands

lsof -i -u osradar

List files by PID

below command will show you who is running on process 1326

lsof -p 1326

I hope you will learn much about lsof command, if you want to go deeper see man pages by running command “man lsof“

The post How to Use lsof Command appeared first on Linux Windows and android Tutorials.

In this article, you will learn how to install Plex on CentOS/RHEL 8 (64-bit) server.

Prerequisites

• RHEL or CentOS 8 Server.
• Root Access.
• A static IP address.

Step 1: Add Plex Repository

vi /etc/yum.repos.d/plex.repo

Add below lines in this file.

[Plex]
name=Plex
baseurl=https://downloads.plex.tv/repo/rpm/$basearch/
enabled=1
gpgkey=https://downloads.plex.tv/plex-keys/PlexSign.key
gpgcheck=1

Step 2: Installation on Plex media server

Use below command to install plex:

dnf install plexmediaserver -y

Now enable plex service on boot and start it.

systemctl enable plexmediaserver
systemctl start plexmediaserver

Step 3: Configure Firewalld for Plex

create new firewalld service configuration “plex.xml” for plex using below command.

vi /etc/firewalld/services/plex.xml

Now add below configuration in this file.

<?xml version="1.0" encoding="utf-8"?>
<service>
<short>plex</short>
<description>Ports required by Plex.</description>
<port protocol="tcp" port="32400"></port>
<port protocol="tcp" port="32469"></port>
<port protocol="tcp" port="8324"></port>
<port protocol="tcp" port="3005"></port>
<port protocol="udp" port="32414"></port>
<port protocol="udp" port="32413"></port>
<port protocol="udp" port="32412"></port>
<port protocol="udp" port="32410"></port>
<port protocol="udp" port="1900"></port>
<port protocol="udp" port="5353"></port>
</service>

Save changes and exit.

So, add “plex” service in firewalld list and restart the firewall.

firewall-cmd --add-service=plex --permanent
firewall-cmd --reload

Step 4: Access Plex Media Server

Then, you can access your Plex using below link and you will see welcome screen provided in the image below.

http://SERVER-IP:32400/web/

Now complete the registration and you will be redirected to your dashboard.

And that is it. So, enjoy it.

Als you can read our post about cezerin. Or, all our posts about CentOS.

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The post How to install Plex Media Server on RHEL 8 AND CENTOS 8? appeared first on Linux Windows and android Tutorials.