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or, a fancier way: {{{ date &> file }}} |
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[[http://wiki.bash-hackers.org/syntax/redirection|More discussion]] [[http://wiki.bash-hackers.org/howto/redirection_tutorial|In-depth: Illustrated Tutorial]] ---- CategoryShell |
How can I redirect the output of multiple commands at once?
Redirecting the standard output of a single command is as easy as
date > file
To redirect standard error:
date 2> file
To redirect both:
date > file 2>&1
or, a fancier way:
date &> file
In a loop or other larger code structure:
for i in $list; do echo "Now processing $i" # more stuff here... done > file 2>&1
However, this can become tedious if the output of many programs should be redirected. If all output of a script should go into a file (e.g. a log file), the exec command can be used:
# redirect both standard output and standard error to "log.txt" exec > log.txt 2>&1 # all output including stderr now goes into "log.txt"
Otherwise command grouping helps:
{ date # some other command echo done } > messages.log 2>&1
In this example, the output of all commands within the curly braces is redirected to the file messages.log.
In-depth: Illustrated Tutorial