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Tips And Tricks

Unix / Linux : How to print duplicate lines from file

September 12, 2014 by Sharad Chhetri Leave a Comment

In this post I am sharing a small tip which is very useful while for system admins. The tip is about how to print duplicate lines from file. Sometimes we get the big file with lot of contents.And there may be chances of duplicate lines. To find the duplicate lines from file, use the below […]

Filed Under: Linux Commands, Tips And Tricks Tagged With: linux commands

Allow only members of Wheel group to use su command on RHEL/CentOS

March 27, 2014 by Sharad Chhetri Leave a Comment

In this tutorial we will learn,how to allow only members of Wheel group to use su command.Means only members of wheel group can switch to another user by using su command.As we know that in Red Hat based operating system, wheel group is a special administrative group. To allow only Wheel group’s member to use […]

Filed Under: Linux Commands, Tips And Tricks Tagged With: linux command, su command

New XAMPP security concept

March 24, 2014 by Sharad Chhetri 7 Comments

After installing XAMPP, I saw apache Error page “Access to the requested object is only available from the local network.”I have installed XAMPP for Linux version 1.8.3-3 on CentOS 6.5 . After installation of XAMPP, I opened the URL address in web browser.By-default the URL redirected to Alias /xampp and It shown a apache “Error […]

Filed Under: Linux, Tips And Tricks Tagged With: XAMPP

Print double hyphen sign simultaneously in post of Octopress

March 22, 2014 by Sharad Chhetri Leave a Comment

After spending lot of time on this issue.I finally found the solution to print double hyphen sign simultaneously in post of Octopress.Octopress uses markdown as a default text editor.In recent time,Octopress come up as a promising bloging platform.I was working on my staging blog which is based on Octopress. While writing the post in Octopress,I […]

Filed Under: BlogTalks, Linux, Tips And Tricks Tagged With: Octopress

shell-init: error retrieving current directory: getcwd: cannot access parent directories: No such file or directory

March 13, 2014 by Sharad Chhetri Leave a Comment

shell-init: error retrieving current directory: getcwd: cannot access parent directories: No such file or directory While working on setting new squid transparent proxy in network.I faced an unusual error while restarting the Squid service. The getcwd() function copies an absolute pathname of the current working directory to the array pointed to by buf, which is […]

Filed Under: Linux, Tips And Tricks Tagged With: tips

fatal error: error writing to /tmp/ccwAjc9Z.s: No space left on device

February 25, 2014 by Sharad Chhetri 2 Comments

Today,while working in cloud server.I faced an issue.I was copying some files to s3bucket,which I have mounted by using s3fs package. One every copy command(i.e cp),I was getting error – fatal error: error writing to /tmp/ccwAjc9Z.s: No space left on device. The problem was not new for me.I have seen this problem earlier also.The problem […]

Filed Under: Linux, Tips And Tricks Tagged With: troubleshooting

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Sharad Chhetri is an experienced Linux - Cloud Engineer & freelancer. Working on Open Source Technology since RHEL 4.0 (Red Hat Enterprise Linux). He loves sharing the knowledge which earned from real scenarios. Don't be surprised if you find him in technology seminars and meetup groups. You can contact him on email for freelance projects at admin@sharadchhetri.com. Read More…

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