#Lesson3 contents:

#TO mail someone a file use the "mail" command follow by the user's email address
#Remember to redirect "<" to the file as follow:
	mail rserna2 < .alias

#To find any file with EXCATLY 100 bytes use the "find" command with the option 
#"-size n" where "n" is the size of the file, follow by the letter "c". Note 
#that this will find ALL files that has exactly 100 bytes.
	find -name "*.ksh" -size 100c -print

#To find ALL files that has more than 100 bytes, use "-size +n: where n=number of 
#bytes follow by the character "c" as follow:
	find . -name "*.ksh" -size +100c -print

#To find ALL files that has less than 100 bytes, use "-size -n: where n=number of 
#bytes follow by the character "c" as follow:
	find . -name "*.ksh" -size -100c -print

#To find out all the users who logged on to the subnet 130.182.166.* do as follow:
	who |grep "130.182.168.*"

#To find out how many users who logged on to the subnet 130.182.166.* do as follow:
	who |grep "130.182.168.*" | wc -l

#TO create a email file with the email addresses of all users who logged on to the
#subnet 130.182.168.*, do as follow:
	who |grep "130.180.168.*"|awk '{print $1 "@calstatela.edu"}' > cs345F03.txt

#TO create a email file, WITHOUT any DUPLICATE, with the email addresses of all 
#users who logged on to the subnet 130.182.168.*, do as follow:
	who |grep "130.182.168.*"|awk '{print $1 "@calstatela.edu"}' | sort -u > cs345F.txt

#To ftp from the command prompt, use the command "ftp" follow by the server's name as
#follow:
	ftp neptune.calstatela.edu
#Some commonly used FTP commands: (Make sure that you are in FTP mode NOT Unix mode) 
#       help : To display all ftp commands.
#	dir  : display the contents of the current directory.
#	cd   : change directory
#	hash : display the download/upload status. (this FTP-command has to be issued#              BEFORE the "mget" or "mput" command.
#       mget : to download a file(s) to the current directory. (whereever you are 
#              when you issue the ftp command is your downloading directory.
#   	mput : to upload a file(s) to the directory of your ftp directory.
#	quit : quit the ftp mode.
#	binary : to download/upload a non text file. This command has to be issued
#                BEFORE the mget/mput command.

#To use the awk command to operate on a csv file (comma seperated variable) we use
#the AWK command with the option -F follow IMMEDIATELY by the field seperator (in
#this case it is a comma) as follow:
	awk -F, '{print $2}' Orders.csv 

#To obtain a desired date format use the "date" command with the "+" option follow
#by these choices: "%m" for month, "%d" for date and "%y" for year.
	date '+ %m/%d/%y'
#This will give us:  10/11/03