sed -i.bak s/check_http_redirect_temporarily/check_http_redirect/ *

for i in *; do sed s/oldtext/newtext/ < $i > $i.mod; mv $i.mod $i; done;

for i in *; do sed s/check_http_redirect/check_http_redirect_temporarily/ < $i > $i.mod; mv $i.mod $i; done;

Replace some text in multiple files in a directory

Bash