grep a character/word from a string and count number of occurrences in Linux

Question

I like to a grep a character from a string then count it, I don't see from google search. Please advise. I might miss search for it.

node_count=`echo "test1|test2|test3" | grep "|" |wc -l`|echo $node_count

output is always 1 to me.

1

Remember that I don't grep from a file but a line of string. Grep from a file is easy.

Answer 1

You might want to use option -o of grep :

$ node_count=`echo "test1|test2|test3" | grep  "|" -o |wc -l` && echo $node_count
# 2