echo bonjour ; |

echo bonjour | |

|

echo bonjour |;

cat Makefile | grep pr | head -n 5 | cd test (mybin)

cat Makefile | grep pr | head -n 5 | cat test (bin)

cat Makefile | grep pr | head -n 5 | hello (NA)

cat | cat | cat | ls

echo hudifg d | | hugdfihd

echo |

| echo

sort | ls

exit 0 | exit 1

exit 1 | exit 0

cat < Makefile | grep gcc > output
ls
rm output

rm output

sleep 1 | exit

ls | cat

cat | ls

ulimit -n

ls /proc/self/fd

ls | ls | ls /proc/self/fd

ls | ls | ls | ls | ls | ls /proc/self/fd