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Shell Programming and Scripting

Command <<EOT ?

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# 1  
Old 01-19-2010
Command <<EOT ?
I saw someone use this line and sometimes I see it interchanged with EOF which I understand to mean end of file. What is the purpose of this usage?
Code:
cat something <<EOT
something else
EOT

# 2  
Old 01-19-2010
the actual term is "here documents" which is used to redirect input to an interactive program (cat in this case)
It doesn't have any relation with EOF. its just a kind of label. you can use any word in that place.

some popular usage are ftp, database processing etc.

Code:
ftp -inv $host << FTP ## start of label, below command will be treated as ftp command not the shell commans
user $user $passwd
bin
put $file
bye
FTP # end of ftp commands
ls ## shell commands again

# 3  
Old 01-19-2010
Or "here text".
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