After you login to linuxlab, you can use the command

   psql -h sql.csic.umd.edu

to access PostgreSQL database.  Use "man psql" for detail usage of the commnad.
Then you can use \h for help with SQL commands, \? for help on internal slash
commands and \q to quit.

Below is an example for connecting to PostgreSQL database:
-------------------------------------------------------------------------------

[cs424241@nauseous ~]$ psql -h sql.csic.umd.edu
Welcome to psql 7.3.2, the PostgreSQL interactive terminal.

Type:  \copyright for distribution terms
       \h for help with SQL commands
       \? for help on internal slash commands
       \g or terminate with semicolon to execute query
       \q to quit

cs424241=> \h
Available help:
  ABORT                     CREATE TABLE              EXECUTE                   
  ALTER DATABASE            CREATE TABLE AS           EXPLAIN                   
  ALTER GROUP               CREATE TRIGGER            FETCH                     
  ALTER TABLE               CREATE TYPE               GRANT                     
  ALTER TRIGGER             CREATE USER               INSERT                    
  ALTER USER                CREATE VIEW               LISTEN                    
  ANALYZE                   DEALLOCATE                LOAD                      
  BEGIN                     DECLARE                   LOCK                      
  CHECKPOINT                DELETE                    MOVE                      
  CLOSE                     DROP AGGREGATE            NOTIFY                    
  CLUSTER                   DROP CAST                 PREPARE                   
  COMMENT                   DROP CONVERSION           REINDEX                   
  COMMIT                    DROP DATABASE             RESET                     
  COPY                      DROP DOMAIN               REVOKE                    
  CREATE AGGREGATE          DROP FUNCTION             ROLLBACK                  
  CREATE CAST               DROP GROUP                SELECT                    
  CREATE CONSTRAINT TRIGGER DROP INDEX                SELECT INTO               
  CREATE CONVERSION         DROP LANGUAGE             SET                       
  CREATE DATABASE           DROP OPERATOR CLASS       SET CONSTRAINTS           
  CREATE DOMAIN             DROP OPERATOR             SET SESSION AUTHORIZATION 
  CREATE FUNCTION           DROP RULE                 SET TRANSACTION           
  CREATE GROUP              DROP SCHEMA               SHOW                      
  CREATE INDEX              DROP SEQUENCE             START TRANSACTION         
  CREATE LANGUAGE           DROP TABLE                TRUNCATE                  
  CREATE OPERATOR CLASS     DROP TRIGGER              UNLISTEN                  
  CREATE OPERATOR           DROP TYPE                 UPDATE                    
  CREATE RULE               DROP USER                 VACUUM                    
  CREATE SCHEMA             DROP VIEW                 
  CREATE SEQUENCE           END                       
cs424241=> \?
 \a             toggle between unaligned and aligned output mode
 \c[onnect] [DBNAME|- [USER]]
                connect to new database (currently "cs424241")
 \C [STRING]    set table title, or unset if none
 \cd [DIR]      change the current working directory
 \copy ...      perform SQL COPY with data stream to the client host
 \copyright     show PostgreSQL usage and distribution terms
 \d [NAME]      describe table, index, sequence, or view
 \d{t|i|s|v|S} [PATTERN] (add "+" for more detail)
                list tables/indexes/sequences/views/system tables
 \da [PATTERN]  list aggregate functions
 \dd [PATTERN]  show comment for object
 \dD [PATTERN]  list domains
 \df [PATTERN]  list functions (add "+" for more detail)
 \do [NAME]     list operators
 \dl            list large objects, same as \lo_list
 \dp [PATTERN]  list table access privileges
 \dT [PATTERN]  list data types (add "+" for more detail)
 \du [PATTERN]  list users
 \e [FILE]      edit the query buffer (or file) with external editor
 \echo [STRING] write string to standard output
 \encoding [ENCODING]  show or set client encoding
 \f [STRING]    show or set field separator for unaligned query output
 \g [FILE]      send query buffer to server (and results to file or |pipe)
 \h [NAME]      help on syntax of SQL commands, * for all commands
 \H             toggle HTML output mode (currently off)
 \i FILE        execute commands from file
 \l             list all databases
 \lo_export, \lo_import, \lo_list, \lo_unlink
                large object operations
 \o FILE        send all query results to file or |pipe
 \p             show the contents of the query buffer
 \pset NAME [VALUE]  set table output option
                (NAME := {format|border|expanded|fieldsep|null|recordsep|
                tuples_only|title|tableattr|pager})
 \q             quit psql
 \qecho [STRING]  write string to query output stream (see \o)
 \r             reset (clear) the query buffer
 \s [FILE]      display history or save it to file
^[[7m--More--^[[m
 \set [NAME [VALUE]]  set internal variable, or list all if no parameters
 \t             show only rows (currently off)
 \T [STRING]    set HTML <table> tag attributes, or unset if none
 \timing        toggle timing of commands (currently off)
 \unset NAME    unset (delete) internal variable
 \w [FILE]      write query buffer to file
 \x             toggle expanded output (currently off)
 \z [PATTERN]   list table access privileges (same as \dp)
 \! [COMMAND]   execute command in shell or start interactive shell
cs424241=> \q
[cs424241@nauseous ~]$