diff -r dir1 dir2 | grep dir1 | awk ‘{print $4}’ > difference1.txt
说明:
diff -r dir1 dir2
显示哪些文件仅在dir1中,哪些仅在dir2中,以及两个目录(如果有)中存在的文件的更改。diff -r dir1 dir2 | grep dir1
显示哪些文件仅在dir1中awk
仅打印文件名。

diff -r dir1 dir2 | grep dir1 | awk ‘{print $4}’ > difference1.txt
说明:
diff -r dir1 dir2显示哪些文件仅在dir1中,哪些仅在dir2中,以及两个目录(如果有)中存在的文件的更改。
diff -r dir1 dir2 | grep dir1显示哪些文件仅在dir1中
awk仅打印文件名。