shell [ find / grep 的基本使用 ]

find . -newer han2.sh -print | wc -l

find . -newer han2.sh -type f -print | wc -l

find . \( -name "*1*" -or -newer eval.sh \) -type f -print

grep 的初步使用    grep 是 通用正则表达式解析器

grep in words.txt

in there inthi I am good
Tom cintheschool fowloer

hp@ubuntu:~/shel$ grep -c in words.txt
2
hp@ubuntu:~/shel$ grep -v in words.txt
hello world!
hp@ubuntu:~/shel$ grep -cv in words.txt
1
hp@ubuntu:~/shel$ more words.txt
hello world!
in there inthi I am good
Tom cintheschool fowloer

hp@ubuntu:~/shel$ 

grep e$ words2.txt
grep a[[:blank:]] words2.txt
grep Th.[[:space:]] words2.txt
grep -E [a-z]\{10\} words2.txt