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  • vim
    Linux

    vi / vim : Remove space at beginning and end of each lines

    BySharad Chhetri November 3, 2015December 18, 2024

    In this article, we will learn in vi / vim editor how can we remove all the spaces at the beginning or end of the file. Recently, we have encountered the problem where contents where copied from one file to another file with new file extension. There we found too many uneven spaces in each line at beginning and end.

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  • Nagios AWS
    Linux

    Nagios monitoring on AWS Autoscaling group instances

    BySharad Chhetri October 31, 2015December 19, 2024

    Setting Nagios monitoring alerts on instances behind the AWS Elastic Load Balancer (ELB) is always tricky part. In this post, we will learn how we can monitor the instances which are created by autoscaling policy and running behind the ELB. We expect our reader do have good knowledge on scripting, nagios and AWS comptuting. This…

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  • postfix
    Linux

    Postfix + SES : SASL authentication failed

    BySharad Chhetri September 26, 2015December 19, 2024

    After configuring AWS SES service with Postfix, you may have found error in logs – SASL authentication failed . The error will not allow you to send email from server by using AWS SES service.

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  • nagios email pdf
    Linux

    Send nagios report as pdf file email

    BySharad Chhetri August 26, 2015December 19, 2024

    The tutorial will give an idea, how you can send Nagios Report as pdf file via email. We will achieve this requirement, with the help of script and using wkhtmltopdf command line tool

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  • Convert website page to pdf and image
    Linux

    Convert website page to pdf and image

    BySharad Chhetri August 23, 2015December 10, 2024

    To convert website page to pdf and image is very useful for various reasons. This kind of requirement you may have seen while making any report and we need to convert website page to pdf or image. Recently, we got requirement to create website page to pdf for some report. Actually the report was displaying…

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  • python
    Linux

    Python headers are required to build Mercurial but weren’t found

    BySharad Chhetri August 18, 2015December 20, 2024

    Python headers are required to build Mercurial but weren’t found

    Read More Python headers are required to build Mercurial but weren’t foundContinue

  • Install Ansible in Ubuntu , Red Hat and CentOS
    Linux

    2 Methods to Install Ansible on Ubuntu, CentOS and RHEL

    BySharad Chhetri July 19, 2015December 10, 2024

    Learn what is Ansible and its features. How to install Ansible on Ubuntu. Red Hat and CentOS in various versions. The Article will help you to provide basic understanding on Ansible and help you to get started.

    Read More 2 Methods to Install Ansible on Ubuntu, CentOS and RHELContinue

  • postgresql
    Linux

    Set postgres password on PostgreSQL 9.4

    BySharad Chhetri July 15, 2015December 24, 2024

    Learn how to set password on Potgresql database server.

    Read More Set postgres password on PostgreSQL 9.4Continue

  • postgresql
    Linux

    Install postgresql 9.4 on Ubuntu 14.04 LTS server

    BySharad Chhetri July 14, 2015December 24, 2024

    Learn how to install postgresql 9.4 on Ubuntu server

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  • Install webmin on Ubuntu 14.04 LTS Server
    Linux

    Install webmin on Ubuntu 14.04 LTS Server

    BySharad Chhetri July 10, 2015December 10, 2024

    Webmin which is a web based system administration tool for unix based servers . The post will guide you to install latest webmin on Ubuntu 14.04 LTS Server. The webmin has list of modules to manage the unix / linux servers. One of the well known module is Virtualmin which will talk later on our…

    Read More Install webmin on Ubuntu 14.04 LTS ServerContinue

  • print new line character in Unix / Linux
    Linux

    print new line character in Unix / Linux

    BySharad Chhetri July 9, 2015December 10, 2024

    This is quick post on print new line character in Unix / Linux. Here, we will share two methods of print / echo new line character. Generally , when we do bash/shell scripting most of the time we require this. Let’s start this essential basic of bash/shell scripting. echo command : new line character In…

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  • jemalloc/jemalloc.h: No such file or directory – Redis
    Linux

    jemalloc/jemalloc.h: No such file or directory – Redis

    BySharad Chhetri July 7, 2015December 10, 2024

    Recently while installing redis from source, met with error – zmalloc.h:50:31: fatal error: jemalloc/jemalloc.h: No such file or directory . It seems the jemalloc is the dependency which is not allowing redis to compile. NOTE: We have already install redis 3.0 from source on Ubuntu 14.04 / CentOS 7 / RHEL 7 , where we…

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  • Install redis 3.0 from source on Ubuntu 14.04 / CentOS 7 / RHEL 7
    Linux

    Install redis 3.0 from source on Ubuntu 14.04 / CentOS 7 / RHEL 7

    BySharad Chhetri July 5, 2015December 10, 2024

    In this tutorial we will learn, how to install redis 3.0 from source on Ubuntu 14.04 / CentOS 7 / RHEL 7. In our previous post we wrote tutorial on, install redis on CentOS 7 with yum command . Redis is a an Open Source advanced key-value cache and store . To know more about…

    Read More Install redis 3.0 from source on Ubuntu 14.04 / CentOS 7 / RHEL 7Continue

  • wget : continue download of the file
    Linux

    wget : continue download of the file

    BySharad Chhetri July 2, 2015December 10, 2024

    Wget command is generally used by many Linux/Unix users. GNU Wget is a free utility for non-interactive download of files from the Web. It supports HTTP, HTTPS, and FTP protocols, as well as retrieval through HTTP proxies (The definition taken from man wget command). If you are internet user, you many times have faced with…

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  • Print grep command output without seperator
    Linux

    Print grep command output without seperator

    BySharad Chhetri July 1, 2015December 10, 2024

    I am working with grep command and found two dashes ( — ) in output. How can I print grep command output without two dashes ( — ) that is also called separator. Answer : To print grep command output without separator , you can use the option –no-group-separator with grep command. How to print…

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