Episode 9 Redirection and substitution

We explore some more shell basics including redirection to and from files, and command substitution. This feature allows the output of one command to be used as parameters of another command.

22 September 2015

Time Jump Topic or command
00:30  

apt-get update
00:33  

apt-get upgrade
01:31  

package
01:41  

apt-get remove
02:30  

apt-get purge
03:05  

apt-get autoremove
03:35  

apt-get install -f (force)
04:33  

redirection
04:51  

standard input
04:57  

standard output
05:06  

standard error
07:00  

> (redirect stdout)
07:47  

>& (redirect stdout and stderr)
08:51  

cat (concatenate files)
09:28  

^D (end of input)
10:59  

>> (append stdout)
11:57  

set -o noclobber
12:27  

.bashrc
13:18  

< (redirect stdin)
17:26  

command substitution
17:30  

` (command substitution)
18:59  

grep -l (files-with-matches)
21:41  

mogrify (process image in-place)
23:35  

$() (command substitution)
blog comments powered by Disqus