Shaaf's blog

While running fedora, if you want to change the port for your ssh, just changing the firewall rules will not make a difference. If you are running selinux its important that you change the policy to allow a different port as well. I did learn it the hard way though, hopefully the following guide should be helpful.

Lets start by an introduction to semanage.

From man

Description

semanage is used to configure certain elements of SELinux policy without requiring modification to or recompilation from policy sources. This includes the mapping from Linux usernames to SELinux user identities (which controls the initial security context assigned to Linux users when they login and bounds their authorized role set) as well as security context mappings for various kinds of objects, such as network ports, interfaces, and nodes (hosts) as well as the file context mapping. See the EXAMPLES section below for some examples of common usage. Note that the semanage login command deals with the mapping from Linux usernames (logins) to SELinux user identities, while the semanage user command deals with the mapping from SELinux user identities to authorized role sets. In most cases, only the former mapping needs to be adjusted by the administrator; the latter is principally defined by the base policy and usually does not require modification.

I just wanted to find the number of lines of java code in a directory i.e. recursively..

find . -type f -name '*java' -print0 | wc -l --files0-from=-

Output:
.
.
56 ./App.java
550 total