我正在尝试结合grep并grep -v一起搜索.输出应显示所有以？结尾的行.xml,但要排除以？开头的行$.
这是我试过的命令; 没有工作:
grep *.xml file1.txt | grep -v '$' file1.txt > output
grep *.xml | grep -v '$' file1.txt > output
grep *.xml grep -v '$' file1.txt > output
grep *.xml '$' file1.txt > output