Hi,
I'm getting an error with my filesystems.
After [df -k]
/dev/dsk/c0t0d0s7.......................100%............/export/home

and
[home]#ls -l
drwxr----.......................512......TT_DB
drw..............................8192.....lost+found
drw...............................512......oracle
drw...............................512......test
[home]#cd oracle
[oracle]#ls -l
-rw..............................10..........afiedt.buf
drw.............................512.........app
-rw-------...................857968.....core
drw..............................512........stok


What is the "core" file above? And is it safe to remove?
Please help me now...

In general....

A core file is created when a program terminates unexpectedly, due to a bug, or a violation of the operating system's or hardware's
protection mechanisms. The operating system kills the program and
creates a core file that programmers can use to figure out what went
wrong. It contains a detailed description of the state that the
program was in when it died.

Read more at What Is a "core" File?

I am not aware of oracle related stuff....

a core file is a memory dump of a program the crashed.
feel free to delete.

however it may be good to find out what crashed and why.

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Ooo nooo!
I moved the App directory, and so everything has been down. And then I moved back the directory.
I'm getting this error: "Listener failed to start a dedicated server process"
can not open these files:
libskgxp8.so
libclntsh.so.8.0

What will I do now?
Please help..

Youve lost the links/ or another process still running / or ??...
There is a oracle procedure for relinking oracle DB etc...give it a try.
But before be sure you have nothing oracle running , or still stored somewhere in memory check with ipcs command and remove...

Before we start:
Are you the regular administrator of the server and do you have root access?
How many users on the server?
What is the Operating System and version?
(We need this because there is so much variation in unix commands related to disc storage).

Please post exactly what you typed to "move" the "App" directory and exactly what you typed to move it back.

For your "filesystem full" please post the exact response to:
not edited highlights. An 800 Kb core file is unlikely to to be significant unless this is a tiny filesystem.