How To Reset Root Password On CentOS 7

Posted in Linux Servers on Jan 24, 2019

To get started, turn on the machine that you’ve forgotten the root password on. For CentOS 7 devices, you’ll be given 5 seconds at the boot menu to select the operating system kernel to boot into.

That 5 seconds is important, because allows for admins to select different kernels or edit existing kernel parameters before booting.

At the boot menu, press e to edit the existing kernel (Core) as shown below.

Next, scroll down to the list until you see the line underlined below ( ro ) . What we need to do is change that ro to rw and start into a bash shell. It should look like this rw init=/sysro...

How to manage csf via command line in linux server

Posted in Linux Servers on Jan 02, 2019

We can install the csf firewall to secure the Linux servers. We can manage the firewall via command line easily. Please read our the following article and command structure.

Start the firewall rules

Csf -s

Example: #csf -s

Flush/Stop firewall rules (note: lfd may restart csf)

csf -f

Example: #csf -f

Restart the firewall rules

csf -r

Example: #csf -r

Deny an IP and add to /etc/csf/csf.deny

csf -d 

Example: #csf -d 103.129.97.14

Flush all IPs from the temporary IP entries

csf -tf

Example: #csf -tf

Remove an IP from the temporary IP ban or allow list

csf -tr

Example: #csf -tr 103.129.97.14

All...[Read more...]

Wishing you and your family a Merry Christmas

Posted in Linux Servers on Dec 24, 2018

We would like to make the better use of this opportunity and congratulate our partners, who are benefited from our work. Hope for a better performing season in the new year.

How to export import a MySQL database via SSH

Posted in Linux Servers on Nov 16, 2018

In this article, we will cover exporting and importing a database via SSH. Make sure that you replace the following variables in the commands below:

USERNAME - the MySQL user assigned to your database.

DATABASE - the name of your MySQL database.

Exporting a MySQL database

To export a MySQL database, you need to use the mysqldump command. Here is the full command for exporting your database:

mysqldump -uUSERNAME -p DATABASE > backup.sql

You will be prompted for a password - this is your MySQL user's password.

The MySQL database will be exported to a file named "backup.sql" in your current direc...

How to Schedule a Backup of All MySQL Databases on Ubuntu

Posted in Linux Servers on Nov 16, 2018

Step 1: Create the Backup Script

Create a folder to store your backup script in. I suggest /scripts for this example: sudo mkdir /scripts

Create a file called mysql-backup.sh inside the scripts folder:

sudo vim /scripts/mysql-backup.sh

Add the following code to the file and save it:

#!/bin/bash
#----------------------------------------
# OPTIONS
#----------------------------------------
USER='root'       # MySQL User
PASSWORD='webdev' # MySQL Password
DAYS_TO_KEEP=0    # 0 to keep forever
GZIP=1            # 1 = Compress
BACKUP_PATH='/backups/mysql'
#----------------------------------------

#...

How to Schedule a Backup of All Websites Hosted on Ubuntu

Posted in Linux Servers on Nov 15, 2018

Step 1: Create the Backup Script

The first thing we need to do is create a simple backup script that will backup websites located in /var/www. The script will change into the directory and then loop through archiving each folder into /backups/www. It will also be able to cleanup backups older than X days.

Create a folder to store your backup script in. I suggest /scripts for this example:

sudo mkdir /scripts

Create a file called www-backup.sh inside the scripts folder:

sudo vim /scripts/www-backup.sh

Add the following code to the file and save it:

#!/bin/bash
#---------------------------------...

CentOS Web Panel Installation

Posted in Linux Servers on Nov 14, 2018

First, we prepare the server or VPS for CentOS Web Panel

yum -y install wget

yum -y update

reboot

Set Hostname

After the reboot is finished you would need a hostname for the server you are installing CWP on.

To do that log into your server and type in the following:

hostname srv.cloudtechtiq.com

Downlaod & installation steps for CentOS 7 server

cd /usr/local/src
wget http://centos-webpanel.com/cwp-el7-latest
sh cwp-el7-latest

After the screen has stopped moving which takes around 30-40 minutes you need to reboot your server to complete the installation:

reboot

That is it now you have CentO...

How to Set or Change Hostname in CentOS 7

Posted in Linux Servers on Oct 31, 2018

to change or set a CentOS 7 machine hostname, use the hostnamectl

hostnamectl set-hostname your-new-hostname

hostname command you can also use hostnamectl command to display a Linux machine hostname

hostnamectl

New hostname, a system reboot is required, issue one of the below commands in order to reboot a CentOS 7 machine

init 6
systemctl reboot
shutdown -r

How to extend the volume size on ec2 instance aws

Posted in EC2-Hosting, Linux Servers on Oct 30, 2018

1. Confirm the kernel.

   # uname -r

2.6.32-431.29.2.el6.x86_64

2. Confirm the initial allocated size

   # df -h

   Filesystem Size Used Avail Use% Mounted on

   /dev/xvda1 7.9G 797M 6.7G 11% /

   tmpfs 498M 0 498M 0% /dev/shm

   # lsblk

   NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT xvda 202:0 0 15G 0 disk └─xvda1 202:1 0 8G 0 part /

3. Install EPEL6 Repo

   # wget http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
   # rpm -ivh epel-release-6-8.noarch.rpm

4. Install the dracut & cloud-utils growpart modules-growroot

   # yum install -y dracut-modules-growroot cloud-utils-growpart

5. The initrd needs...

Check Apache concurrent Connections using Netstat command

Posted in Linux Servers on Oct 12, 2018

When your server is hitting high & overload, you might want to check, how many active connections are there and which IP take maximum of hit/connection from apache.

To Count Apache concurrent connection’s, use any of the below commands.

netstat -nt | grep :80 | wc -l

netstat -plan|grep :80 | wc -l

netstat -an | grep 'EST' | wc -l

netstat -ant | grep ESTABLISHED | grep :80 | wc -l

ps -A | grep httpd | wc -l

ps -ef | grep http | wc -l

ps aux | grep httpd | wc -l

ps aux | grep http | grep -v "\(root\|grep\)" | wc -l

To print the active Internet connections to the server at port 80 and sort...[Read more...]