擅长:python、mysql、java
<p>一行:</p>
<pre><code> echo "src dest"; cat /tmp/air | while read s; do for d in `cat /tmp/air`; do if [ $s != $d ]; then echo $s $d; fi; done; done
</code></pre>
<p>将输出:</p>
<pre><code>src dest
ATQ HYD
ATQ BLR
ATQ GOI
ATQ AMD
ATQ CCJ
ATQ TRV
HYD ATQ
HYD BLR
HYD GOI
HYD AMD
HYD CCJ
HYD TRV
BLR ATQ
BLR HYD
BLR GOI
BLR AMD
BLR CCJ
BLR TRV
GOI ATQ
...
</code></pre>