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This article mainly shows you "how to use the fuser command", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "how to use the fuser command" this article.

So use fuser to view

$fuser / opt/oracle/app/oracle/product/11.2.4/db_1/lib/libclntsh.so.11.1/opt/oracle/app/oracle/product/11.2.4/db_1/lib/libclntsh.so.11.1: 29888m

If you see that the file is indeed occupied, but you don't know which process it is occupied by, use the lsof command

$. / lsof / opt/oracle/app/oracle/product/11.2.4/db_1/lib/libclntsh.so.11.1

After the implementation, there is no result, so there is no way to find out.

So he asked his colleague, who used the root user to execute the lsof command, and only specified to the top directory to check.

# lsof / opt COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAMERaterServ 29888 rate3 mem REG 64,0x6 10800648 85874 / opt/oracle/app/oracle/product/11.2.4/db_1/lib/libnnz11.soRaterServ 29888 rate3 mem REG 64,0x6 121875400 324102 / opt/oracle/app/oracle/product/11.2.4/db_1/lib/libclntsh.so.11.1

From the above output, we can see that there is indeed a process occupied, and the process number is 29888.

Check the process name of 29888 pairs again.

# ps-ef | grep 29888

Find a service that is an application, and after communicating with the test, the process can kill directly, so

Kill-9 29888

The opatch apply was executed successfully again.

The above is all the contents of this article "how to use fuser commands". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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