Netstat command is tool to check the network configure and activity. The default centos 7 and RHEL 7 not found netstat command. How to use netstat command on Centos 7 and RHEL 7 To find out which package provides "netstat" command. yum provides */netstat Or yum whatprovides */netstat The output screen as below net-tools-2.0-0.22.20131004git.el7.x86_64 : Basic networking tools Repo        : @base Matched from: Filename    : /bin/netstat Install netstat command # yum install net-tools The output screen as below: Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile  * base: ftp.jaist.ac.jp  * epel: mirror.ehost.vn  * extras: ftp.jaist.ac.jp  * updates: ftp.jaist.ac.jp Resolving Dependencies --> Running transaction check ---> Package net-tools.x86_64 0:2.0-0.22.20131004git.el7 will be installed --> Finished Dependency Resolution Dependencies Resolved ================================================================================

System Commands Command Description Examples shutdown bring your system down shutdown -h now --> Halt or poweroff after shutdown shutdown -r now --> Reboot after shutdown halt stop your system. halt reboot reboot your system. reboot uptime Tell how long the system has been running. uptime runlevel find the previous and current system runlevel. runlevel printenv print all or part of environment printenv env run a program in a modified environment env hostname show or set the system's your host name hostname --> show the system's host name hostname newhostname -->- set the system's uname print system information uname -a --> print all information locale Displays information about the current locale, or

In this tutorial, How to remind USER notify passowrd expired on zimbra . Bash script have policy 120 days password expired. zimbra notify password expired by bash script To create zimbra_notify_change _pass.sh file to notify password expired for all zimbra accounts. [root@mail ~]# cat zimbra_notify_change_pass.sh The content zimbra notify password expired as below #!/bin/bash # Bash scriptzimbra password expiry email notification. # To be performed as daily cronjob run as zimbra USER. ######################### Set environment ######################### #Todays date, in seconds: DATE=$(date +%s) # Set some vars: # First notification in days, then last warning: FIRST="7" LAST="3" # pass expiry in days POLICY="120" # Sent from: FROM="admin@mail.huuphan.com" # Get all _USERs - it should run once only. _USERS=$(/opt/zimbra/bin/zmprov -l gaa | egrep -v "spam|ham|virus-quarantine|galsync"); # zimbra password variable

Introduction Learn how to recover data from crashed disks using the ddrescue command in Linux . This step-by-step guide will help you rescue valuable data, solve mounting errors, and ensure your filesystem's integrity on CentOS 7. Data loss can be a nightmare, especially when it involves critical files and documents. In the world of Linux, there are powerful tools designed to mitigate such risks. One such tool is `ddrescue`, a command-line utility that specializes in rescuing data from damaged disks. Whether you're dealing with I/O errors or corrupted filesystems, `ddrescue` offers a reliable solution to recover data from crashed disks. In this guide, we will explore how to use the `ddrescue` command to recover data from a failed disk on a CentOS 7 server. We will also address common mounting errors, such as the "wrong fs type, bad option, bad superblock" error, and provide solutions to resolve these issues. What is ddrescue and Why Use It? `ddrescue` is a GNU utility

A reverse DNS lookup or reverse DNS resolution (rDNS) is the querying of the Domain Name System (DNS) to determine the domain name associated with an IP address – the reverse of the usual "forward" DNS lookup of an IP address from a domain name. Zimbra tips, How to Enable PTR/Reverse DNS lookup Incomming Email. More information from Wikipedia . Step 1: Enable zimbraMtaRestriction as command below su - zimbra zmprov mcf +zimbraMtaRestriction "reject_unknown_client_hostname" Step 2: zimbra postfix reload postfix reload Conclusion Thought the article, you can use "Zimbra Enable PTR/Reverse DNS lookup Incomming Email" as above . I hope will this your helpful.

I experienced setup and configure nginx multiple domain on one VPS. In this tutorial, How to using NGINX Multiple ssl certificates on one ip. Multiple SSL Certificates use letsencrypt Web server: Nginx Two domain: domain1.com domain2.cm IP VPS: 111.111.111.222 You buy VPS linux and configure multiple domain on one ip VPS server. I use VPS linode.com cheap 5 USD/month. I love it! Nginx Redirect all HTTP requests to HTTPS server {         listen 80;         listen [::]:80 ipv6only=on;         if ($host = www.domain1.com) {         return 301 https://$host$request_uri;         }         if ($host = www.domain2.com) {         return 301 https://$host$request_uri;         }         server_name www.domain1.com domain1.com www.domain2.com domain2.com;         return 444; } Nginx config for domain1.com server {         listen 443 ssl http2;         listen [::]:443 ssl http2;         server_name www.domain1.com domain1.com;         root /path/to/do