Some of my systems are logging this error:
su: pam_env(su:session): Unable to open env file: /etc/default/locale: No such file or directory
I already had the “locales” package installed, to create the file:
dpkg-reconfigure locales
Follow the prompts to choose your locale(s). Result:
cat /etc/default/locale
# File generated by update-locale LANG=en_US.UTF-8
Let’s say we’ve got:
$ cat file.txt1 2 3 4 5 6 7 | blah blah blah append after me blah bleh! append after me blah blah blah bleeeh |
This will add “new stuff” after every line that says “append after me”:
$ sed -i '/append after me/a new stuff' file.txt
Bingo:
$ cat file.txt1 2 3 4 5 6 7 8 9 | blah blah blah append after me new stuff blah bleh! append after me new stuff blah blah blah bleeeh |