Executando múltiplos comandos de uma vez só

The three commands in the following example will all execute even if the ones preceding them fail:

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$ make ; make install ; make clean

However, you may want to abort subsequent commands if one fails. You can do this using the && (and) operator as in:

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$ make && make install && make clean

If the first command fails the second one will never be executed. A final refinement is to use the || (or) operator as in:

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$ cat file1 || cat file2 || cat file3

In this case, you proceed until something succeeds and then you stop executing any further steps.