Appending to a file using exec command

Shell Programming and Scripting
1

Hi,

I need the data to be appended to the file using exec command in linux.

I am able to add the data to a file using exec command but the file is getting overwritten.

Above exec command is used to overwite in a file.

When I use "exec >>& fileName", getting "syntax error near unexpected token `&' and `exec >>& capture.txt'"

Please someone tell me how to append to a file using exec command.

2

Assuming you are not using a csh-derived shell, then:

exec >> filename
3

I want the errors occured in a script should be appended to the file using exec command.
when i run

, errors are displaying in STDOUT.
I want errors to be appended to a file(say log file).

4

Then just redirect just STDERR:

exec 2>> filename

or if both STDOUT and STDERR:

exec >> filename 2>&1

or if using bash:

exec &>> filename

These are detailed in the man bash (linux) and man ksh (linux) manual pages under 'redirection'