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# Send contents of file to command
$ command < file	

# Redirect to file and pipe						
$ command > file | grep -i error	

# Redirect Stderr twice		
$ command 2> file2 > file1 2>&1	

# Text to Stdin (command)
$ command << 'text'				

# Redirect both Stdout and Stderr to file
$ command > file 2>&1		

# Redirect Stdout to one file and Stderr to another
$ command > file1 2> file2	

# Pipe Stdout and Stdin to another process	
$ command 2>&1 | command2			

$ less <(gzip -cd foo.gz)
$ gzip -cd foo.gz && less foo

# Redirect an error
$ echo An Error >&2 2>&1 | sed -e 's/A/I/'