oktw says to #ysitd
<pcchou>: | mov qword [rbp - 0x20], str.ubuntu ; [0x400687:8]=0x2f0075746e756275 LEA str.ubuntu ; "ubuntu" @ 0x400687 | mov qword [rbp - 0x18], str._bin_bash ; [0x40068e:8]=0x7361622f6e69622f LEA str._bin_bash ; "/bin/bash" @ 0x40068e | mov qword [rbp - 0x10], 0 | mov rax, qwo