How to use instantclient to connect to an oracle database
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Many times when you connect to oracle, you don't want to install the client, so you can connect with instantclient.
Download address. This is for the linux x86 platform.
Https://www.oracle.com/technetwork/topics/linuxx86-64soft-092277.html
It is subdivided into many packages, as follows:
Instant client Package-Basic all the files needed to run OCI,OCCI and JDBC-OCI applications.
Instant client Package-Basic Lite: contains only English error messages and only supports unicode,ascii, Western European character set.
Instant client Package-JDBC Supplement adds xa, internationalization and RowSet operations to jdbc.
Instant Client Package-SQL * Plus contains sqlplus and required library files.
Instant client Package-SDK uses Instant Client to develop header files and sample makefile for Oracle applications.
Instant client package-the libraries that ODBC needs when using odbc, not available on all platforms.
You must choose between Basic and Basic Lite, and the other packages are optional.
I downloaded Basic, SQL * Plus and put it in a folder, create the file tnsnames.ora in this folder, set the environment variables LD_LIBRARY_PATH and TNS_ADMIN to point to the unzipped directory, and you can use sqlplus.
Examples of environment variables:
[root@demoserver] # more .bash _ profile# .bash _ profile# Get the aliases and functionsif [- f ~ / .bashrc]; then. ~ / .bashrcfi # User specific environment and startup programsPATH=$PATH:$HOME/binexport PATHTNS_ADMIN=/root/instantclient_11_2LD_LIBRARY_PATH=/root/instantclient_11_2export TNS_ADMINexport LD_LIBRARY_PATH
Note:
First, Instant Client does not include tnsping,exp/imp,rman, netca and other tools; if you need these tools, you need to install oracle client.
Second, you don't need oracle users, you can just use root users.
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