There are 3 built-in file descriptors: stdin, stdout and stderr (std=standard).
Basic
0/1/2 references stdin/stdout/stderr
>/2> redirects stdout/stderr, where > is taken as 1>
&1/&2 references stdout/stderr
&> redirects everything
> creates or overwrites a file
>> creates or appends to a file
< reads from a file, where < is taken as 0<
Note: You should be pretty sure of what a command is doing if you are going to wipe it's output.
Redirecting Examples
stdout to file: ls -l > ls-l.txt
stderr to file: grep da * 2> grep-errors.txt
one to another: grep da * 1>&2
everything: do_stuff &> /dev/null
combined: command < input-file > output-file, reads from input-file and writes stdout to output-file
- 0 Benutzer fanden dies hilfreich
Verwandte Artikel
Mod PageSpeed
You can install Mod PageSpeed by using following stepswget...
How To Install and Uninstall FrontPage Extensions
This tutorial will show you how to install and uninstall FrontPage extensions. Please note that...
GeoIP
How to get mod_geoip to work on cPanel (Country and City) mod_geoip allows you to look...
How To Set Up A Cron Job via CPanel
This tutorial is going to show you how to setup a cron job in cPanel the easy way. You can set a...
