sed returns “sed: command garbled”

Question

I have this data in file.txt:

1234-abca-dgdsf-kds-2;abc dfsfds 2
123-abcdegfs-sdsd;dsfdsf dfd f
12523-cvjbsvndv-dvd-dvdv;dsfdsfpage

I want

Answer 1

sed replacement commands are defined as (source):

's/REGEXP/REPLACEMENT/[FLAGS]'

(substitute) Match the regular-expression against the content of the pattern space. If found, replace matched string with REPLACEMENT.

However, you are saying:

sed "s/-.*;/;"

That is:

sed "s/REGEXP/REPLACEMENT"

And hence missing a "/" at the end of the expression. Just add it to have:

sed "s/-.*;/;/"
#            ^