diff问题 -- 生成patch文件

astar

如果比较两个文件,可以通过 diff -u a.txt.orig a.txt > a.txt.patch
如果只有一个文件, 如何使用diff

diff -N a.txt > a.txt.patch    //提示diff: missing operand after `a.txt`

thanks

zhy2111314

diff - find differences between two files