strace log

                                                                  execve("/usr/bin/ip", ["ip", "link", "set", "enp0s20u2", "up"], [/* 27 vars */]) = 0
brk(NULL)                               = 0x15c0000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=194494, ...}) = 0
mmap(NULL, 194494, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fc170008000
close(3)                                = 0
open("/usr/lib/libelf.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\00001\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=96864, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc170006000
mmap(NULL, 2191816, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc16fbfe000
mprotect(0x7fc16fc15000, 2093056, PROT_NONE) = 0
mmap(0x7fc16fe14000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x16000) = 0x7fc16fe14000
close(3)                                = 0
open("/usr/lib/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0 \16\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=14456, ...}) = 0
mmap(NULL, 2109584, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc16f9fa000
mprotect(0x7fc16f9fd000, 2093056, PROT_NONE) = 0
mmap(0x7fc16fbfc000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7fc16fbfc000
close(3)                                = 0
open("/usr/lib/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0000\6\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1977568, ...}) = 0
mmap(NULL, 3815728, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc16f656000
mprotect(0x7fc16f7f1000, 2093056, PROT_NONE) = 0
mmap(0x7fc16f9f0000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x19a000) = 0x7fc16f9f0000
mmap(0x7fc16f9f6000, 14640, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fc16f9f6000
close(3)                                = 0
open("/usr/lib/libz.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360$\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=92640, ...}) = 0
mmap(NULL, 2187656, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc16f43f000
mprotect(0x7fc16f455000, 2093056, PROT_NONE) = 0
mmap(0x7fc16f654000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x15000) = 0x7fc16f654000
close(3)                                = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc170004000
arch_prctl(ARCH_SET_FS, 0x7fc170004b40) = 0
mprotect(0x7fc16f9f0000, 16384, PROT_READ) = 0
mprotect(0x7fc16f654000, 4096, PROT_READ) = 0
mprotect(0x7fc16fbfc000, 4096, PROT_READ) = 0
mprotect(0x7fc16fe14000, 4096, PROT_READ) = 0
mprotect(0x66a000, 4096, PROT_READ)     = 0
mprotect(0x7fc170038000, 4096, PROT_READ) = 0
munmap(0x7fc170008000, 194494)          = 0
socket(AF_NETLINK, SOCK_RAW|SOCK_CLOEXEC, NETLINK_ROUTE) = 3
setsockopt(3, SOL_SOCKET, SO_SNDBUF, [32768], 4) = 0
setsockopt(3, SOL_SOCKET, SO_RCVBUF, [1048576], 4) = 0
bind(3, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 0
getsockname(3, {sa_family=AF_NETLINK, nl_pid=11067, nl_groups=00000000}, [12]) = 0
sendto(3, {{len=32, type=0x10 /* NLMSG_??? */, flags=NLM_F_REQUEST|NLM_F_ACK, seq=0, pid=0}, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"}, 32, 0, NULL, 0) = 32
recvmsg(3, {msg_name={sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, msg_namelen=12, msg_iov=[{iov_base=[{{len=52, type=NLMSG_ERROR, flags=0, seq=0, pid=11067}, "\355\377\377\377 \0\0\0\20\0\5\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...}, {{len=0, type=0 /* NLMSG_??? */, flags=0, seq=0, pid=0}}], iov_len=16384}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 52
access("/proc/net", R_OK)               = 0
access("/proc/net/unix", R_OK)          = 0
socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 4
ioctl(4, SIOCGIFINDEX, {ifr_name="enp0s20u2", }) = 0
close(4)                                = 0
socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 4
ioctl(4, SIOCGIFINDEX, {ifr_name="enp0s20u2", }) = 0
close(4)                                = 0
sendmsg(3, {msg_name={sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, msg_namelen=12, msg_iov=[{iov_base={{len=32, type=0x10 /* NLMSG_??? */, flags=NLM_F_REQUEST|NLM_F_ACK, seq=1492692160, pid=0}, "\0\0\0\0\3\0\0\0\1\0\0\0\1\0\0\0"}, iov_len=32}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0