Learn Linux Shell Scripting - Fundamentals of Bash 4.4

stdout

Most output from commands will be standard output, written to stdout on /dev/fd/1. By using the > symbol, we can redirect this out with the following syntax:

command > output-file

A redirect will always be made to a file (however, as we know, not all files are equal, so after the regular examples, we'll show you some Bash magic where non-regular files are concerned). If the file does not exist, it will be created. If it does exist, it will be overwritten.

In its simplest form, everything that would normally be printed to your Terminal can be redirected to a file:

reader@ubuntu:~/scripts/chapter_12$ ls -l /var/log/dpkg.log -rw-r--r-- 1 root root 737150 Nov  5 18:49 /var/log/dpkg.logreader@ubuntu:~/scripts/chapter_12$ cat /var/log/dpkg.log ...