shell count number of lines
$ wc -l < /dir/file.txt 3272485
Source: stackoverflow.com
linux get lines in file
wc -l <filename>
how to display specific lines from a file in linux
Write a bash script to print a particular line from a file: awk = $ awk '{if(NR==LINE_NUMBER) print $0}' file.txt sed = $ sed -n LINE_NUMBERp file.txt