我可以diff filea fileb看看文件之间的区别。我也head -1 filea可以查看filea 或fileb 的第一行。如何组合这些命令来显示 filea 的第一行和 fileb 的第一行之间的区别?
diff filea fileb
head -1 filea
shell bash diff head
bash ×1
diff ×1
head ×1
shell ×1