# vim test2.txt Christian Scott lives here and will put on a Christmas party. There are around 30 to 35 people invited. They are: Tom Dan Rhonda Savage Nicky and Kimerly. Steve, Suzanne, Ginger and Larry.
大写字母开头,总长度为3位。
# cat test2.txt | grep '^[A-Z]..$' Dan
空格开头,第一个字母大写字母开头,总长度为3位。
# cat test2.txt | grep '^ [A-Z]..$' Tom
大写字母开头,包含数字:
# cat test2.txt | grep '^[A-Z]*.*[0-9]' There are around 30 to 35 people invited.
大小写字母开头,包含逗号:
# cat test2.txt | grep '^[A-Za-z]*.*[,][A-Za-z]*.*$' Steve, Suzanne, Ginger and Larry.
目录中以z开头的文件:
# ls -l /bin/ | grep '[0-9] z[a-z]*.*$' # ls /bin/ | grep '^z'
目录中不包含大写字母A-Y,小写字母a-Y及数字0-9的文件:
# ls /bin/ | grep '^[^A-Ya-y0-9]'
目录中以x或者z开头的文件:
# ls /bin/ | grep '^[xz]'
目录中包含8或者6的文件:
# ls /bin/ | grep '[86]'
目录中以gc开头,长度为3个字符的文件:
# ls /bin/bash | grep '^gc.$' gcc
目录中以op结尾,长度为4个字符的文件
# ls /bin/bash | grep '^..op$' htop
目录中以z开头,h结尾,长度为3个字符的文件:
# ls /bin/bash | grep '^z.h$' zsh
目录中以t开头,e或者p结尾,长度为3个字符的文件:
# ls /bin/bash | grep '^to[ep]' toe top
目录中以t开头,以数字6结尾的文件:
# ls | grep '^t[a-z]*6$' tracepath6 traceroute6
[THE END]