strace -v -e trace = desc ls
open ("/ etc / ld.so.cache", O_RDONLY | O_CLOEXEC) = 3
fstat (3, {st_dev = makedev (8, 1), st_ino = 1311343, st_mode = S_IFREG | 0644, st_nlink = 1, st_uid = 0, st_gid = 0, st_blksize = 4096, st_blocks = 176, st_size = 88205 , st_atime = 2018/08 / 30-07: 23: 57.086001060, st_mtime = 2018/08 / 30-07: 23: 55.777347107, st_ctime = 2018/08 / 30-07: 23: 56.357637086}) = 0
mmap (NULL, 88205, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f76831d6000
close (3) = 0