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Special Forums UNIX Desktop Questions & Answers Cat/tac displays nothing but vi does Post 302820205 by Yoda on Wednesday 12th of June 2013 10:52:06 AM
Old 06-12-2013
I guess there are non-printing characters in your input file.

Use -v option with cat to show non-printing characters:
Code:
cat -v file

For further reference check the man page:
Code:
man cat

This User Gave Thanks to Yoda For This Post:
 

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TAC(1)								   User Commands							    TAC(1)

NAME
tac - concatenate and print files in reverse SYNOPSIS
tac [OPTION]... [FILE]... DESCRIPTION
Write each FILE to standard output, last line first. With no FILE, or when FILE is -, read standard input. Mandatory arguments to long options are mandatory for short options too. -b, --before attach the separator before instead of after -r, --regex interpret the separator as a regular expression -s, --separator=STRING use STRING as the separator instead of newline --help display this help and exit --version output version information and exit AUTHOR
Written by Jay Lepreau and David MacKenzie. REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report tac translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
rev(1) Full documentation at: <http://www.gnu.org/software/coreutils/tac> or available locally via: info '(coreutils) tac invocation' GNU coreutils 8.28 January 2018 TAC(1)
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