Shell: read a file and echo it's contents to another file

Question

I have a Makefile that is supposed to echo aliases from another file to your local .zshrc file.

I need to read the contents of the file aliases.sh, and echo it's contents to ~/.zshrc, how is this possible?

Answer 1

Depending on permissions, I prefer the following:

$cat aliases.sh | sudo tee ~/.zshrc

If you dont want to overwrite the contents on the destination file use the -a.
This option tells tee to append to the given file instead of overwriting it.

$ cat aliases.sh | sudo tee -a ~/.zshrc

Answer 2

cat aliases.sh >> ~/.zshrc