显示文件的行数
sed -n '$=' filename grep '.*' -c filename perl -ne 'END {print "$i"} ++$i' filename perl -ne 'END {print $.."\n"}' filename awk 'END{print NR}' filename awk '{print NR}' filename |tail -n1 grep -n "" filename|awk -F: '{print '}|tail -n1 wc -l filename|awk '{print }' cat filename |wc -l ruby -e 'p open("filename").read.count("\n")'