"$()" or `` is not properly expanding the linux command in shell script

Question

My code snippet has an echo line as below:

echo "$(wc -l prov_bulk) provisioning commands found between $t_stmp1 of $(head -1 file_list) till $t_stmp2 of $(tail -1 file_list)"

Expected output:

1054721 provisioning commands found between 2017033023 of 170330.AUG till 2017033102 of 170331.AUG

Output getting:

1054721 prov_bulk provisioning commands found between 2017033023 of 170330.AUG till 2017033102 of 170331.AUG

Why the file name "prov_bulk" also shows up ? How to get rid of this ?

The filename is part of the output of your command. It expands perfectly. — that other guy, Apr 02 '17 at 15:57

score 1 · Accepted Answer · answered Apr 02 '17 at 14:32

By simply adding a < should solve your problem. The redirection omits the filename.

echo "$(wc -l < prov_bulk) provisioning commands found between $t_stmp1 of $(head -1 file_list) till $t_stmp2 of $(tail -1 file_list)"

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