Oracle InstantClient: TNSNAMES.ORA location
When you install the InstantClient binaries, you often want to use your existing TNSNAMES.ORA file containing all your databases. So how do you specify the location of your TNSNAMES.ORA file?
Oracle 11g R2 response file example
After installing the Operating System (in my case usually Red Hat Enterprise Linux or Oracle Enterprise Linux) and configuring all necessary parameters, one has to install the Oracle software. It is usually a good idea to use a response file to do this.
ORA-00845: MEMORY_TARGET not supported on this system
There is always something that gets in the way. One problem I regularly stumble upon when installing a new Oracle 11g R2 installation is the following error when I try to start the database:
SQL> startup nomount;
ORA-00845: MEMORY_TARGET not supported on this systemSo I keep this post mainly for my own reference when installing a new database on a Linux system.
SQL*Plus on Debian
In this article, I will describe the steps necessary to install Oracle SQL*Plus on a Debian host. I am using Debian 6.0.5 and will install the “Instant Client” package from Oracle (version 11.2.0.3). First, we will prepare the system for the installation, download the installation package, set all the necessary variables, start SQL*Plus and connect to an instance. So let’s get started…
Linux tar: Cannot change ownership to [..]: Permission denied
In a script I was working on, the tar command always reported the following error when I tried to extract an archive:
Cannot change ownership to uid 1000 , gid 1000: Permission denied
WMIC on Linux examples
In a previous post I showed how to install the Windows Management Instrumentation (WMI) client for Linux. In this post, I wish to show a few ways on how to query a Windows-based host using the WMI client.
insserv: script vzreboot: service vzreboot already provided
With Debian 6, the Debian distribution made the jump to a dependency based boot sequence using LSB tags. So when you update your current Debian installation, you might encounter some problems when your scripts are not properly prepared. Such as the following message:
insserv: script vzreboot: service vzreboot already provided!
Debian: Script for SFTP users
When using a server with multiple external users, one thing that regularly comes up is that users want to access a folder on the server, such as the root folder for a webserver. This way every user can manage their files and upload new content. This can be achieved securely with SFTP, which uses the SSH protocol for file transfers.
In this article, I provide a simple script to create new users with minimal preparation and all correct settings. The text is based on the following article on debian-administration.org: OpenSSH SFTP chroot() with ChrootDirectory.
Linux LVM How-to: Adding a new partition
Since I started out with Linux (so about six years ago), I always used the Linux Logical Volume Manager (LVM) to partition my tables. First it was just because it seemed easier to configure my harddisks with it (also, the installer usually provided a nice option to do so), but in the last few months I had the possibility to work more with LVM and got to know some nice features.
One thing I regularly have to do is to extend an existing logical volume on a server. This article focuses on extending a logical volume with the help of LVM.
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BASH: here-document at line n delimited by end-of-file (wanted `EOF’)
On one of our Debian hosts, we use bash scripts and cron jobs to automate certain tasks. One of these bash scripts downloads files from an FTP server and archives them. After upgrading the host machine to Debian 6.0.4, one of the bash scripts suddenly showed warnings:
/srv/foo/bar.sh: line 146: warning: here-document at line 140 delimited by end-of-file (wanted `EOF')