[oracle] Connect to Oracle DB using sqlplus

Easy way (using XE):

1). Configure your tnsnames.ora

XE =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = HOST.DOMAIN.COM)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = XE)
    )
  )

You can replace HOST.DOMAIN.COM with IP address, the TCP port by default is 1521 (ckeck it) and look that name of this configuration is XE

2). Using your app named sqlplus:

sqlplus SYSTEM@XE

SYSTEM should be replaced with an authorized USER, and put your password when prompt appear

3). See at firewall for any possibilities of some blocked TCP ports and fix it if appear

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