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 Kasutajad peavad seda kasulikuks
Seotud artiklid
GeoIP
How to get mod_geoip to work on cPanel (Country and City) mod_geoip allows you to look...
How do I configure a cron job ?
Cron jobs are commands used to schedule tasks that must run periodically, for instance: from...
How To Install and Uninstall FrontPage Extensions
This tutorial will show you how to install and uninstall FrontPage extensions. Please note that...
Mod PageSpeed
You can install Mod PageSpeed by using following stepswget...
How to create custom error pages
This tutorial will teach how to create custom Error Pages. Create error pages for 404 Not Found...
