How to check file systems type ?

using  # mount command we can see filesystems type  like as below

ext3,ext4,xfs,nfs or cifs.

rpcapd: Is the server properly installed on connect() failed: Connection refused (code 111)

The rpcapd service is a thin wrapper around libpcap that allows for remote packet capture.Disabling the daemon will get rid of these errors from the logs . however some application may be need this service as pre-req . hence should troubleshoot by application end .  

Error connecting to host using protocol Unspecified

The rpcapd service is a thin wrapper around libpcap that allows for remote packet capture.Disabling the daemon will get rid of these errors from the logs . however some application may be need this service as pre-req . hence should troubleshoot by application end .  

What is metadata journeling ?

metadata journling will helps power outage situations . for example lets say their was power outage while writing data to disk
hence after its back metadata know where to check and where it got corrupted.

what is INODE in LInux ?

Each and every file and directory has inode number .

Inode contrains filesystem entry metadata

metadata contains  owner , permissoins of file/folder and data and time stamps

# ls -li <filename or directory name>       >> You can see inode number