Record

The command "source" command or "." is to run a command in the current shell (process), instead of spawning a new child ...

In Linux, redirecting input and output of command uses  ">" or "<" characters.  For example,  cat file1 file2 file...

The initialization of bash is different when it is started from login event or started as a shell after login. When user login, Linux starts...

When a server (service) using rpc starts, it registers with rpcbind (portmapper) process. It can either bind to a port it selected itself an...

There are 3 layers.  The layer handles connection, authentication and security  The second layer is the optimizer, execution engine and cach...

Logging allows the changed data to be updated to the table at a later time. Although logging is achieved by writing the data out to log, it ...

Read uncommitted aka dirty read allows reading data that have not been committed by transaction.  Read committed allows only retrieving rows...