Author Archives: Ahmed Tawfik

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About Ahmed Tawfik

Cybersecurity Professional, Systems Engineer, OSS & Linux Geek

Two Simple Methods to Move/Rename Oracle DB Data Files

Posted on November 7, 2012 by Ahmed Tawfik

First Method (must be done as sysdba): 1. First, shut down the database: “shutdown immediate;” 2. Rename and/or move data files to new destination using OS commands (e.g. mv for linux) 3. Startup DB in mount mode: “startup mount;” 4. … Continue reading →

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SQL Statement to get version of your Oracle DB

Posted on November 6, 2012 by Ahmed Tawfik

> sqlplus / as sysdba SQL> select * from v$version; BANNER ——————————————————————————– Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 – 64bit Production PL/SQL Release 11.2.0.2.0 – Production CORE 11.2.0.2.0 Production TNS for Linux: Version 11.2.0.2.0 – Production NLSRTL Version 11.2.0.2.0 … Continue reading →

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Alternative way to find files with specific extension in a folder on Linux

Posted on November 3, 2012 by Ahmed Tawfik

If you don’t like the “find” command, you can use the following one instead (I prefer it myself): ls -R | grep “\.xml” where “-R” lists all recursively grep is used to filter filename “\.xml” you must put the “\” … Continue reading →

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How to mount CD on Linux

Posted on October 31, 2012 by Ahmed Tawfik

mount -t iso9660 -o ro /dev/cdrom /mount_point

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NFS Mount Issue: chown can’t change membership of nfs filesystem shared from OpenFiler

Posted on October 24, 2012 by Ahmed Tawfik

The problem is the following: I created an NFS share from OpenFiler, and when I tried to mount it using the NFS client on other server, it mounted successfully, but I couldn’t change ownership of the NFS share, as follows: … Continue reading →

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