Dev {Tricks}

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Linux edquota Command Examples to Edit User and Group File Quota

By default, edquota will open up the quota file in an Vi editor, from where you can change the values.

Edit User Quota

edquota -u username

This will edit the quota for user “username”.

Edit Group Quota

To edit group quota, use -g.

edquota -g groupname

This will edit the quota for group “groupname”

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wget Cron Jobs

The wget command is used for downloading files from remote servers. It’s also used to triggers server side scripts using the cron jobs.

To download a single file

wget https://domain.com/filename.zip

This command will download a file, and name it filename.zip(which is after the last / )

Use -O to specify the target local file name, like this

wget -O /home/useraccount/public_html/targetname.zip https://domain.com/filename.zip

This command will download a file, and name it targetname.zip

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How to change the IP Address of CWP Server

  • If you have CWPpro licence, first change IP to new one at https://support.centos-webpanel.com/clientarea.php and then follow following steps
  • Create/update reverse DNS in your VPS provider. That would be your new hostname.
  • Create nameservers with new IP in Domain registrar.
  • Go to CWP Settings and then IP Manager and add the new IP address with Netmask and Gateway. Note that you have to configure the VPS with new IP and test it accordingly.
  • Go to Server Settings and then Change Hostname and replace New Hostname with rDNS/PTR records of your Default/New IP. Confirm that everything here looks ok.
  • Go to User Accounts and then List Accounts and you need to go to “Edit Account” section of all accounts on your server and replace IP field with Default/New IP Address (you also must check the “Update DNS Zone” checkbox). Test one account first and if it works then go for all accounts. SSL may cause but will be resolved automatically. You may have to use VPN to test.
  • Go to CWP Settings and then Edit Settings and replace Shared IP field with Default/New IP Address. Check the “Rebuild vHosts” check box and save changes.
  • Go to DNS Functions and then Edit Nameservers IPs and replace all NS1 and NS2 IPs with Default/New IP Address.
  • After completing all of the above, rebuild WebServer in order to prevent future issues , So you need to Go to Apache Settings and then Apache Re-Build and recompile your apache webserver
  • If you were using Varnish Cache or Nginx Reverse Proxy you must have to Go to Apache Settings and then Select WebServers and select Default Web Servers which you were using and Click on “Save & Rebuild Configuration“.
  • if you were using MailServer you should Rebuild your MailServer. Go to Email and then MailServer Manager and Rebuilt Mail Server. If you need to restart all mail server services (Postfix, ClamAV, Amavis, Spamassassin, Dovecot) you can do that here. 
  • Reboot your server
  • Enjoy!

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OJS Email Sending Problem

  • There was a problem sending an email message. Please try again later, or contact your system administrator.

At first, check whether Principal Contact details were added in Journal. Then go for Step One.

Step One

Turn on SMTP in config.php

[email]

; Use SMTP for sending mail instead of mail()
 smtp = On

; SMTP server settings
 smtp_server = mail.example.com
 smtp_port = 25

; Enable SMTP authentication
; Supported smtp_auth: ssl, tls (see PHPMailer SMTPSecure)
 smtp_auth = ssl
 smtp_username = username
 smtp_password = password
;

You contact hosting provider to get the SMTP details

NB: If the above setting does not work anyway, then go for adding envelop sender.

Step Two

Allow envelop sender

; Allow envelope sender to be specified
; (may not be possible with some server configurations)
 allow_envelope_sender = On

; Default envelope sender to use if none is specified elsewhere
 default_envelope_sender = my_address@my_host.com

; Force the default envelope sender (if present)
; This is useful if setting up a site-wide no-reply address
; The reply-to field will be set with the reply-to or from address.
 force_default_envelope_sender = On

Make sure to match the domain in your default_envelope_sender with the domain of OJS installation. If it doesn’t match this increases the spam rating.

 

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Centos 7 with DirectAdmin installation checklist

Install the following prerequisite

Step One

  • Run yum update command 
    yum update
  • Run wget update command 
    yum install wget

Step Two

  • For CentOS 7 
    yum install psmisc net-tools systemd-devel libdb-devel perl-DBI
  • For CentOS 6 
    wget gcc gcc-c++ flex bison make bind bind-libs bind-utils openssl openssl-devel perl quota libaio libcom_err-devel libcurl-devel gd zlib-devel zip unzip libcap-devel cronie bzip2 cyrus-sasl-devel perl-ExtUtils-Embed autoconf automake libtool which patch mailx db4-devel

DirectAdmin Installation

  1. Disable SELinux. Disable the firewall. 
    setenforce 0
  2. Download DirectAdmin installation script. 
    wget http://www.directadmin.com/setup.sh
  3. Change the downloaded setup file permission 
    chmod 755 setup.sh
  4. Now run the installation script. 
    ./setup.sh
  5. Enter your License Key. Installation Completed. Login to DirectAdmin 
    http://serverip:2222

For more Configuration: [Visit]