033-Unit 12 Introduction to String Processiong

head 档案前10行内容

tail 档案最后10行内容 -f

wc 统计行数字数和字节 -l -w -c

uniq 合并相同行 sort -u   uniq -c

Other String Processing Tool:paste 横排粘贴 tr 转换字符

Version Comparison with diff : diff 比较档案 sdiff

Spell Checking with aspell : aspell check   look

Formatting Tools : expand  fmt  pr