How to Echo Bash Command to a File

If you want to save the output of a command to a file, then you can make use of the redirection operators.

Redirection Operators:

Operator	Description
>	It redirects standard output to a file. Note that it will overwrite the file's content if it exists.
>>	It redirects standard output to a file. Note that it will append the output to the end of the file.
<	It redirects standard input from a file by providing input to a command from the contents of the file.
2>	It redirects standard error (file descriptor 2) to a file, overwriting the file's content if it exists.
2>>	It redirects standard error (file descriptor 2) to a file, appending the output to the end of the file.
&>	It redirects both standard output and standard error to a file, overwriting the file's content if it exists.
&>>	It redirects both standard output and standard error to a file, appending the output to the end of the file..
>&	Redirects one file descriptor to another file descriptor. For example, 2>&1 redirects standard error to standard output.

Now let us see a few simple examples of how to redirect a bash command output to a file.

bash-3.2$ ls -ltrh > /Users/c2ctechtv/Desktop/ls_command_output.txt

bash-3.2$ cat /Users/c2ctechtv/Desktop/ls_command_output.txt
total 0
drwxr-xr-x    5 root  wheel   160B Aug  5 11:51 standalone
drwxr-xr-x   42 root  wheel   1.3K Aug  5 11:51 share
drwxr-xr-x  229 root  wheel   7.2K Aug  5 11:51 sbin
drwxr-xr-x  357 root  wheel    11K Aug  5 11:51 libexec
drwxr-xr-x   32 root  wheel   1.0K Aug  5 11:51 lib
drwxr-xr-x  981 root  wheel    31K Aug  5 11:51 bin
lrwxr-xr-x    1 root  wheel    25B Aug  5 11:51 X11R6 -> ../private/var/select/X11
lrwxr-xr-x    1 root  wheel    25B Aug  5 11:51 X11 -> ../private/var/select/X11
drwxr-xr-x    5 root  wheel   160B Aug 11 07:36 local