strace shows:
open("/var/lib/NetworkManager/timestamps", O_RDONLY) = 20 fstat(20, {st_mode=S_IFREG|0644, st_size=1646, ...}) = 0 read(20, "\n[timestamps]\n3c32aa58-a2ed-44e7"..., 4096) = 1646 read(20, "", 4096) = 0 close(20) = 0 open("/var/lib/NetworkManager/timestamps.EB5H7V", O_RDWR|O_CREAT|O_EXCL, 0666) = 20 fcntl(20, F_GETFL) = 0x8002 (flags O_RDWR|O_LARGEFILE) fstat(20, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f04b964c000 lseek(20, 0, SEEK_CUR) = 0 write(20, "\n[timestamps]\n3c32aa58-a2ed-44e7"..., 1646) = 1646 fstatfs(20, {f_type="EXT2_SUPER_MAGIC", f_bsize=4096, f_blocks=7874279, f_bfree=5238919, f_bavail=4838919, f_files=2003120, f_ffree=1658729, f_fsid={-1107732364, 115902444}, f_namelen=255, f_frsize=4096}) = 0 lstat("/var/lib/NetworkManager/timestamps", {st_mode=S_IFREG|0644, st_size=1646, ...}) = 0 fsync(20) = 0 close(20) = 0
strace shows:
open("/ var/lib/ NetworkManager/ timestamps" , O_RDONLY) = 20 S_IFREG| 0644, st_size=1646, ...}) = 0 \n3c32aa58- a2ed-44e7" ..., 4096) = 1646 var/lib/ NetworkManager/ timestamps. EB5H7V" , O_RDWR| O_CREAT| O_EXCL, 0666) = 20 S_IFREG| 0644, st_size=0, ...}) = 0 PROT_WRITE, MAP_PRIVATE| MAP_ANONYMOUS, -1, 0) = 0x7f04b964c000 \n3c32aa58- a2ed-44e7" ..., 1646) = 1646 "EXT2_SUPER_ MAGIC", f_bsize=4096, f_blocks=7874279, f_bfree=5238919, f_bavail=4838919, f_files=2003120, f_ffree=1658729, f_fsid= {-1107732364, 115902444}, f_namelen=255, f_frsize=4096}) = 0 /var/lib/ NetworkManager/ timestamps" , {st_mode= S_IFREG| 0644, st_size=1646, ...}) = 0
fstat(20, {st_mode=
read(20, "\n[timestamps]
read(20, "", 4096) = 0
close(20) = 0
open("/
fcntl(20, F_GETFL) = 0x8002 (flags O_RDWR|O_LARGEFILE)
fstat(20, {st_mode=
mmap(NULL, 4096, PROT_READ|
lseek(20, 0, SEEK_CUR) = 0
write(20, "\n[timestamps]
fstatfs(20, {f_type=
lstat("
fsync(20) = 0
close(20) = 0