Linux - DbAppWeb.com

April 25, 2018 Linux, Web Servers

How to make your website in maintenance mode through Apache

Problem We need to show the maintenance page to the outside users of our application/website during the deployment of codes or hardware maintenance. We can show the maintenance page or downtime message to the users by making some changes to apache configuration files. But for internal testing, …

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April 12, 2018 Linux

Linux: Count number of files inside a directory including its subdirectories

If you need to count the number of files in a directory as well as all the files in its subdirectories then use the below command. Count Number of Files in Current Directory Use the find . -type f | wc -l command to count the …

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March 23, 2018 Linux

IP Address changed to local after restarting the network services in Linux

Problem I have installed the RHEL 6.8 on a server and after assigning the IP address to the system when I restarted the network services IP address changed to local IP. # service network restart Shutting down interface eth0: Shutting down loopback interface: Bringing up loopback interface: …

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March 21, 2018 Linux

mount: mount to NFS server ’10.xx.x.xx’ failed: timed out (giving up)

Problem I had an NFS server from which some folders were shared with client servers. Shared folders were mounted on the client servers. Due to some hardware problem in the NFS server, the server suddenly becomes dead and after that, I created and configured a new …

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March 18, 2018 IBM WebSphere Application Server, Linux

Switching to JAVA SDK 8.0 from JAVA SDK 7.1 on WAS 8.5.5.x

Before trying to update/upgrade the running JAVA SDK on WAS 8.5.5.x you need to check whether your setup is fulfilling the minimum requirements or not. Fix Pack 9 or higher should be applied to your WAS to switch the JAVA SDK 8.0 from JAVA SDK 7.1. In …

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March 16, 2018 Linux

Transfer file using scp: Permission denied

Problem I tried to copy a file from one Linux server dbappweb to another Linux server dbappweb1 but got the error ‘Permission denied’. I tried to copy the file using the SCP command over ssh. # scp -p PKIServer.zip user1@dbappweb1:/home/user1/ user1@dbappweb1's password: scp: /home/user1/PKIServer.zip: Permission denied Reason I got …

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March 12, 2018 IBM WebSphere Application Server

How to Check JAVA SDK installed on WAS 8.5.5.x and running JAVA SDK

There may be more than one JAVA version installed on a WebSphere Application Server but only one JAVA version will be active at a time. Use the command managesdk to check and manage the JAVA SDK on WAS 8.5..5.x. List all installed JAVA SDK Use the below command …

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March 8, 2018 Linux

NFS mount points unreachable and df hangs

Problem I had an NFS server from which some folders were shared with the client-server. Shared folders were mounted on the client server. Due to some hardware problem in the NFS server, the server suddenly becomes dead and after that when I tried to access the …

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February 23, 2018 IBM WebSphere Application Server

exception: java.lang.ClassNotFoundException: DSRA8000E: Java archive (JAR) or compressed files do not exist in the path or the required access is not allowed. Path: /ojdbc6.jar.

I have installed WebSphere Application Server 8.5 on a new RHEL 6.8 server. After WAS installation I created the data source but when I tried to test the database connection for this data source it becomes failed with the message given below. Problem I got the below error message …

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February 22, 2018 Linux

How to create tar archive and remove original files

Sometimes we need to remove or delete the files after creating the tar archive to increase the free space. Use the tar command with –remove-files option to remove/delete the files after creating the tar archive. List the files # ll total 1015088 -rw-r--r-- 1 root root 810695 Dec 31 04:00 …

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Tag: Linux