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|colspan="2"|{{Admon/note|Using '''&amp;&amp;''' and '''&#124;&#124;''' Conditional Statements|A very useful trick when running several commands in sequence is to use conditional statments. The '''&amp;&amp;''' conditional will run the subsequent command only if the previous command returns a true (0) exit status, for example: <br>'''./configure && make'''. The '''&#124;&#124;''' conditional will run the subsequent command only if the previous command returns a false (non-zero) exit status, for example: <br>'''./configure &#124;&#124; echo "Houston, we have a problem"'''. These conditional can be combined, for example: <br>'''./configure && make &#124;&#124; echo "Houston, we have a problem"'''}}