删除所有以小写字母开头的行

概述删除所有以小写字母开头的行

如果从文件中删除所有行，如果它们以小写字符或标点符号开头？

A bamboo forest is located towards the ruins. a banana . aban Bajramovi was a Serbian-Romani musician. Abancay is a city in southern-central Peru. ! a ban is the strictest punishment.

我想我的输出只是：

A bamboo forest is located towards the ruins. Abancay is a city in southern-central Peru.

我正在尝试sed

sed 's/^[AZ]/d' input

但没有得到预期的结果，任何提示？

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尝试这个：

sed '/^[az[:punct:]]/d' file

或者你也可以像@glennjackman所建议的那样在字符类中使用注释：

sed '/^[[:lower:][:punct:]]/d' file

$ cat file A bamboo forest is located towards the ruins. a banana . aban Bajramovi was a Serbian-Romani musician. Abancay is a city in southern-central Peru. ! a ban is the strictest punishment.

$ sed '/^[az[:punct:]]/d' file A bamboo forest is located towards the ruins. Abancay is a city in southern-central Peru.

$ sed '/^[[:lower:][:punct:]]/d' file A bamboo forest is located towards the ruins. Abancay is a city in southern-central Peru.

我认为你真正想要的是：

$ grep '^[[:upper:]]' file A bamboo forest is located towards the ruins. Abancay is a city in southern-central Peru.

我会使用一个正则表达式来定位你想要省略的行，然后使用grep的-v标志来返回其他的东西 ：

grep -v '^[az[:punct:]]' < input

这是一个awk

awk '!/^[[:lower:][:punct:]]/' file A bamboo forest is located towards the ruins. Abancay is a city in southern-central Peru.

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