Basic Commands in Unix

1.pwd: This command gives you the print working directory : Which means it will give you the path where you are currently standing.

$ pwd
/usrdev/username/ENV4/eodbatch/prd
username@servername:/usrdev/username/ENV4/eodbatch/prd


2.uname: This command will give you the flavor name ,which is Sun Solaris in this case
$ uname
SunOS

3.whoami: will tell you the username with which you are logged in
username@servername:/usrdev/username/ENV4/eodbatch/prd
$ whoami
username

4.uname -a will give you all the details of the flavor in this case its Solaris 
username@servername:/usrdev/username/ENV4/eodbatch/prd
$ uname -a
SunOS servername 5.10 Generic_150400-09 sun4u sparc SUNW,SPARC-Enterprise Solaris

5.ls will list down the files and directories in the current path
$ ls
Run_PreviousDay_Batch.sh     log4j.properties                     quantum.batch.runtime.props.ITD-ENV4  startEODScheduler.NB.AU-ENV4   temp
jfe_properties.txt           logs                                 startEODScheduler                     startEODScheduler.NB.ITD-ENV4  temp1
jfe_properties.txt.AU-ENV4   nohup.out                            startEODScheduler.AU-ENV4             stopScheduler.AU-ENV4          tep
jfe_properties.txt.ITD-ENV4  quantum.batch.runtime.props.AU-ENV4  startEODScheduler.ITD-ENV4            sybinit.err


6.users:will tell you all the users who are currently looged into this server
$ users
imagined imagined imagined username username username username username username mwang10 mwang10

7.who:will give you the details of all the users on the server
username@servername:/usrdev/username/ENV4/eodbatch/prd
$ who
username pts/1        Aug 12 15:41 (ntsydasp1834.pc.internal.macquarie.com)
imagined pts/2        Aug  7 18:25 (aa850026.pc.internal.macquarie.com)
username pts/3        Aug 12 15:10 (ntsydasp1834.pc.internal.macquarie.com)
username pts/5        Jul 23 15:24 (aa903078.pc.internal.macquarie.com)
mwang10  pts/8        Jul 30 15:34 (aa849147.pc.internal.macquarie.com)
mwang10  pts/9        Jul 30 15:35 (aa849147.pc.internal.macquarie.com)
username pts/10       Aug 12 15:41 (ntsydasp1834.pc.internal.macquarie.com)
username pts/11       Aug 12 02:49 (aa878339.pc.internal.macquarie.com)
username pts/12       Aug 12 09:43 (aa104691.pc.internal.macquarie.com)
imagined pts/17       Aug 12 13:15 (msghkapd01.macbank)
imagined pts/18       Aug  8 16:21 (aa850685.pc.internal.macquarie.com)