Author name: Jobin Joseph

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CentOS 7 / RHEL 7 – AWS ec2 – how to set hostname persistent across reboots

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Issue how to set hostname persistent across reboots in CentOS 7 / RHEL 7 on AWS ec2 CentOS 7 / RHEL 7 Hostname changes after reboots in aws ec2 Solution Set the hostname with the below command hostnamectl set-hostname hostname.yourdomainname.com Now run the below to change the cloud.cfg echo “preserve_hostname: true” >> /etc/cloud/cloud.cfg Reboot the …

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Copy and CudaDrive services will be discontinued

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Copy.com (an alternative to Dropbox) by Barracuda announced today that the Copy and CudaDrive services will be discontinued on May 1, 2016. You can migrate your existing data from copy.com to Ondrive though Mover.io Blog Link on How to migrate : https://techlib.barracuda.com/COPY/MoveData Below is the official announcement from copy.com Copy and CudaDrive have provided easy-to-use …

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OpenSSH – Information-leak vulnerability (CVE-2016-0777)

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Vulnerability Since version 5.4, the OpenSSH client supports an undocumented feature called roaming. If a connection to an SSH server breaks unexpectedly, and if the SSH server supports roaming as well, the client is able to reconnect to the server and resume the interrupted SSH session. The roaming feature is enabled by default in OpenSSH …

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CentOS / RHEL – 7 How to set hostname permanently

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Issue How to set hostname in CentOS-7 / RHEL-7 persistent across reboots. – I have changed /etc/hostname and it changes after reboot. Solution In CentOS / RHEL-7 you need to use the hostnamectlcommand line tool to update the hostname – To set the hostname permanently, issue the below command, hostnamectl set-hostname server1.jobnix.in To view the …

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RBL Blacklist check script with email alert – cPanel / WHM – Mail Servers

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Issue How to check my cPanel / WHM server IPs against RBL ? How to prevent my mail server IPs from being blacklisted ? My cPanel server IP is blacklisted. I need an email alert on blacklisting my IPs ! Solution You can install the below script in /etc/cron.hourly or via crontab entry. Make sure …

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Git doesn’t work after upgrading Mac OS X El Capitain

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Issue – Git doesn’t work after upgrading Mac OS to X El Capitain – Output when you run git xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun Solution – run the following command as a user xcode-select –install – This will pop-up a window and continue with it. – Once finished, run …

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