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Top Forums UNIX for Dummies Questions & Answers Help understanding a simple command in BASH Post 302502030 by Scott on Sunday 6th of March 2011 03:39:07 PM
Old 03-06-2011
2>&1 will redirect standard error to wherever you pointed standard output (i.e. the screen by default) to - but in your case, you wrote it to newfile.

ls will print errors to standard error, by redirecting it to the same place (newfile) as standard output the error output will also go to the file (newfile)

Code:
ls > newfile      # write the output of ls to newfile, errors will go to the screen
ls > newfile 2>&1 # write the output of ls to newfile, copy standard error to standard output, which also goes to newfile

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aha(1)								 Ansi HTML Adapter							    aha(1)

NAME
aha - Ansi HTML Adapter SYNOPSIS
aha [options] [-f datei] DESCRIPTION
aha takes SGR-colored Input and prints W3C conform HTML-Code. aha reads the Input from a file or stdin and writes HTML-Code to stdout. OPTIONS
--help , -h , -? A help like this --black , -b Black Background and white "standard color" --pink , -p Pink Background --iso X , -i X Uses ISO 8859-X instead of utf-8. X must be 1..16 --title X , -t X Gives the html output the title --line-fix , -l Uses a fix for inputs using control sequences to change the cursor position like htop. It's a hot fix, it may not work with any pro- gram like htop. (See EXAMPLE) EXAMPLE
aha --help | aha --black --title "the awesome aha help"> aha-help.htm Creates an HTML file with the help of aha with black background colordiff oldfile.c newfile.c | aha > colordiff.htm Creates an HTML file with a colorful diff-output of two files "oldfile.c" and "newfile.c" with white background ls --color=always | aha --pink > ls.htm Creates an HTML file with a colorful ls-output with pink background. echo a | htop | aha --black --line-fix > htop.htm Creates an HTML file with the output of htop. You have to use --line-fix due the other new-line-commands htop uses. AUTHOR
Copyleft Alexander Matthes aka Ziz 2011 zizsdl@googlemail.com SEE ALSO
http://ziz.delphigl.com/tool_aha.php August 31, 2011 aha(1)
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