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List of Posts

  • OSCP Review - Proctored Version
  • Setting up PostGresql Replication with Loadbalancing with PGPOOL II
  • Rotate your video with ffmpeg
  • Cut Video file with ffmpeg
  • Configure postfix to use Sendgrid as default Relay
  • Wordpress Admin Security
  • Touch command tips and tricks
  • Bash - Convert a comma separated list to any Array
  • Random Wake up of Windows Machine from Sleep mode
  • Installing newer or multiple version of python on Centos
  • Postfix Queue Management
  • Build 32 bit application or libraries on 64 bit machine
  • Nagios Bash script to monitor Domain Expiration
  • Resize Partition with parted
  • Centos / Redhat 7 Switching back to iptables
  • SELinux Tutorial
  • New Apache : Authz_core:error Client Denied by Server Configuration
  • Postfix - Sender address rejected: User unknown in virtual mailbox table
  • Filtering capture files with wire shark
  • Postfix Spam Control
  • Postfix Commands
  • Samba Share Fedora 20
  • Mounting NTFS Filesystem
  • NTP Reflection Attack
  • VMware ESXI packet capture
  • ZIP tips and tricks in Linux
  • Root Alias with Qmail
  • Chrooting Users with SFTP
  • Iptables initial Configuration
  • Log Messages with specific prefix to a separate file
  • Download RPM Packages with yum
  • Email Server Utilities
  • Block Chinese Spam
  • Php Display only number of characters from string
  • Execute Windows Batch File from php
  • Terminating a windows process with a Batch File
  • Running a query without affecting slave
  • Turn off ethernet negotiation Linux
  • Open SSL commands
  • MySQL root grant permission denied
  • Printing Content past a specific string From a file
  • yum update error: Error: pkgKey doesn't exist in repo base
  • Enabling Passive FTP Connections through IPTABLES
  • Bash Get Extension from filename
  • Configure Postfix as a backup MX
  • Remote Desktop Login Success / Failure Email Notification
  • Accessing a URL protected by htpasswd (Basic Auth) with php
  • Installing Gluster FileSystem in Centos
  • Kamailio Errors and Solutions
  • Kamailio Log Management
  • Centos Net Install URLs
  • Installing PHP Time Zone Database
  • Implementing Disk Quota
  • Disabling SELINUX
  • Crontab Format
  • Starting and Stopping NFS Service
  • Bash script to check for valid IP
  • Bash Command and output History
  • Running interactive command or script over ssh
  • Resize Image with Bash Script
  • Using IFS variable in shell scripts
  • Mounting Windows Share to Linux
  • Linux filesystem check utility
  • SED Tutorial with examples
  • Gluster Filesystem Troubleshooting
  • Apache - Disable script execution upload directory
  • Linux Top Command
  • Sample SPF Record for a single Email Server
  • Shell Script to Check the Status of MySQL Replication
  • Turn on ping response on windows servers with windows firewall turned on
  • Manually Installing vmware remote console plugin
  • cannot start session without errors
  • Configure PPTP VPN Server
  • VLAN
  • Shell Script to Create and Grant Privilege to a new user
  • Extending an LVM With FreeSpace
  • Installing Mono Tools in Centos
  • Mysqldump Tips and Tricks
  • Starting and stopping vmware from linux shell
  • Generate Certificate signing request (CSR) with openssl
  • Permission denied: proxy: HTTP
  • mysql master master replication with ssl encryption
  • Changing ethernet name in Vmware
  • Install OSsec on Centos
  • Spam Filtering with postifx and pcre
  • install rar unrar in centos
  • Adding default gateway outside subnet
  • Shell script to ssh to a remote host without specifying the port
  • Apache rewrite sample rules
  • Debug apache rewrite
  • Bash one liners
  • Samba Tutorial
  • Archiving and compressing tuotorials tar and gzip
  • Shell Script to Backup all tables separately
  • Postfix Tips and Tricks
  • Apache Rewrite Cheat Sheet
  • Apache rewrite tutorials
  • Install Redmine with ruby and thin on Centos
  • bash script to cd to a path
  • Javascript hide element on click
  • Shell script to display recipient email from message id - postfix
  • ftp access to files outside base directory
  • Zabbix Installation guide
  • Installing and configuring lighttpd with php support
  • php tips and tricks
  • Zabbix Tutorials
  • Creating a NFS Share
  • Shell Script to check filesize
  • Shell scripting tutorials
  • Regular Expressions
  • FFMPEG Commands tips and tricks.
  • Call a url from bash script
  • Useful Find Commands
  • Bash Script to check if a host is alive
  • Adding a Start/Stop Script to chkconfig
  • Export Putty Sessions
  • Sample mysql queries
  • Handling arguments in bash
  • Handling parameters in Bash
  • Check Load average
  • Nice and Renice
  • Shell Script to Backup and Rotate Mysql Database
  • Writing Iptables rules by hand
  • Sample Kickstart file for Redhat / Centos
  • write to a file using php
  • shell script to monitor port and notify by email
  • One liner to change ssh port
  • Shell script to run command on multiple servers
  • C,C++ compiler cannot create executables
  • System Monitoring , disk,cpu and memory
  • connect to 127.0.0.1[127.0.0.1]:10024: Connection refused.
  • Using remote mail server with postfix.
  • Common Ports
  • Iptables tutorial and examples
  • Awk Tutorials and examples
  • Using TcpDump to monitor network activity
  • Adding colors to shell scripts
  • Bash Tutorials and snippets
  • Compile error : undefined reference to pthread_once and dlopen
  • Shell Script to Calculate Memory Usage by A Process
  • Bash Add numbers output in a shell
  • Php Session Timeout
  • Additional Yum Repositories
  • Mysql Tips and Tricks
  • Css Cheat Sheet
  • Finding and optimizing fragmented tables in mysql
  • Reset Postfix Admin password
  • Shared Libraries
  • Grep Tutorials
  • Find Dell service tag
  • cut awk
  • Wget Tutorials
  • Delete Master Boot Record (MBR)
  • Compression Utilities
  • Nagios Installation on Centos
  • Apache Security
  • Rootkit Hunter--check if your system has been compromised
  • Securing Server with Iptables ( Block Except )
  • Block Ports in IPtables
  • Redirect or forward ports in iptables
  • Optimize MySQL From my-large.cnf
  • Monitoring Mysql Variables
  • Password Protected tar files
  • MySql Performance Tuning and utilities
  • Clear network share password
  • Create a swap file
  • Css Quick Notes
  • Delete all files except
  • Mysql Troubleshooting
  • php compile error configure: error: Cannot find libmysqlclient under /usr
  • Rename mutiple files
  • Shell script to backup/restore an existing svn repository
  • PHP basic compile options when buidling from source
  • Compile individual php module
  • Compile mysql client library with utf 8 support
  • Copy preserving symlinks
  • Xuggler
  • Label an Additional Parition
  • Vmware Rescan Hard Drives
  • Apache force use https
  • Utilities Download
  • Server Security Verification Tips and Tricks
  • Using TCP Wrappers
  • View Cronjobs For All Users
  • Centos Testing Repo
  • Mysql Master Master Replication
  • List Installed perl modules
  • Central Log Server with Rsyslog and Php Log Con with TLS/SSL with TCP
  • Add new mysql slave to an existing replication
  • Replicating An Existing Database MySQL
  • MySQL Replication Switch Master/Slave
  • apache init script
  • Compiling an additional module for apache
  • Uninstall Perl Module
  • Yum Tips and Tricks
  • View Last failed login attempts
  • Tutorial on logrotate
  • Shared Library errors
  • Email Piping with Postfix
  • Set server logs to be sent to an email address
  • View Disk Usage for all directories
  • Shell script to delete files and folders older than x days
  • Test Hard Drive Health Status (SMART)
  • Force Unmount busy drive
  • Rebuild RPM Database
  • Strange characters in pstree
  • Putty Tips and Tricks
  • Add Delete ip address to interface
  • Email Notification on Login On Linux Machines
  • Asterisk Tips
  • Repair broken MySQL Replication
  • Default Gateway issue with Multiple Network Cards
  • Citrix Xen Center Tutorials
  • Flush mail queue with various mail servers
  • Install Postfix,mysql,Dovecot in Centos
  • Remount Filesystem in Maintenance Mode (RW)
  • Installing Cygwin
  • String Manipulation in bash script
  • Password Change Plugin with roundcubemail
  • mysql grant privileges
  • Add hard drive in xen center
  • Split into array in bash
  • Check Null string in bash
  • asterisk convert sound to g729
  • Php AGI For Asterisk
  • Crontab Format
  • Share a bash Shell using screen
  • SSH Neat Tips and Tricks
  • Password protect using htaccess
  • Apache Deny access to files or extensions
  • Deny Access from an IP
  • Useful Find Tips and Tricks
  • Load balancing in Apache
  • Apache Prevent Directory Listing
  • php preg match
  • Export CSV Php
  • Read post variables
  • Block Sites by IP
  • Rsync to synchronize directory
  • Shell Script Disk Usage Notification
  • Common Sendmail Issues
  • Create an ISO image in linux
  • View Extensions with Call forwarding enabled
  • Cisco ACL - Insert New line
  • Backup restore mysql database
  • Sudo Tips and Tricks
  • Vsftpd With Mysql backened
  • Setting default group permission on a directory
  • Set Time zone In Linux
  • SCP
  • Ip Authentication in Kamailio
  • Create View for simplifying LCR tables
  • Iptables Neat Tips
  • Kamailio Nat Traversal using RTPProxy
  • Using LCR with kamailio
  • Compiling additional modules kamailio
  • Using Ngrep To capture network activity
  • Install kamailio from source Centos
  • Rest Mysql root Password
  • Using grep to display line that doesnot start with a pattern
  • Use cron to sync time using ntp
  • Sed Find a value between pattern
  • Delete leading spaces vi
  • Block by url and url keywords in squid
  • Configure DNS Server With Views
  • Substract file 1 content from file 2
  • Remove Files from a List
  • Vi editor Tutorial and examples
  • Configure Linux As a router
  • Cloning disk image in Vmware Server via Command
  • Configuring a Dynamic DNS Server
  • Passwordless SSH
  • Change login background in windows 7
  • Adding a machine to samba
  • Creating Alternating colors in a table
  • Asterisk Log to A File
  • IO Redirection In Linux
  • Installing A Custom Repo
  • Asterisk VoiceMail DialPlan
  • Asterisk Greetings Based on Time and Date
  • Time based Dial Plans in Asterisk
  • Asterisk–Creating an Auto Attendant
  • RPM Uninstall error–multiple matches
  • Accessing Microsoft SQL Database from Linux Boxes
  • Export MySQL data to csv using php script
  • Import CSV file to database using PHP
  • Export result of MySQL Query to CSV Format
Amit's Blog © 2021
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