Вот тут нашел как сделать отладку при такой ошибке:
samba.anu.edu.au/rsync/issues.html
На удаленном сервере сделал файл rsync-debug:
#!/bin/sh
ulimit -c unlimited
strace -f rsync "${@}" 2>~/tmp/rsync-$$.out
Запустил rsync с опцией --rsync-path=~/rsync-debug
В результате получился файл с отладочной инфой от strace:
execve("/usr/bin/rsync", [«rsync», "--server", "-e.Lsf", ".", "/home/un1t/tmp/test"], [/* 12 vars */]) = 0
brk(0) = 0x1198000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5af6383000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=43482, ...}) = 0
mmap(NULL, 43482, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f5af6378000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libacl.so.1", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360\36\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=30472, ...}) = 0
mmap(NULL, 2125648, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f5af5f61000
mprotect(0x7f5af5f68000, 2093056, PROT_NONE) = 0
mmap(0x7f5af6167000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0x7f5af6167000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libpopt.so.0", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340\"\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=41984, ...}) = 0
mmap(NULL, 2137264, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f5af5d57000
mprotect(0x7f5af5d61000, 2093056, PROT_NONE) = 0
mmap(0x7f5af5f60000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x9000) = 0x7f5af5f60000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0`\355\1\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1432968, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5af6377000
mmap(NULL, 3541032, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f5af59f6000
mprotect(0x7f5af5b4e000, 2093056, PROT_NONE) = 0
mmap(0x7f5af5d4d000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x157000) = 0x7f5af5d4d000
mmap(0x7f5af5d52000, 18472, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f5af5d52000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libattr.so.1", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0p\24\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=17808, ...}) = 0
mmap(NULL, 2112952, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f5af57f2000
mprotect(0x7f5af57f6000, 2093056, PROT_NONE) = 0
mmap(0x7f5af59f5000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7f5af59f5000
close(3) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5af6376000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5af6375000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5af6374000
arch_prctl(ARCH_SET_FS, 0x7f5af6375700) = 0
mprotect(0x7f5af5d4d000, 16384, PROT_READ) = 0
mprotect(0x7f5af6385000, 4096, PROT_READ) = 0
munmap(0x7f5af6378000, 43482) = 0
rt_sigaction(SIGUSR1, {0x41ab20, [], SA_RESTORER|SA_NOCLDSTOP, 0x7f5af5a281e0}, NULL, 8) = 0
rt_sigaction(SIGUSR2, {0x41b450, [], SA_RESTORER|SA_NOCLDSTOP, 0x7f5af5a281e0}, NULL, 8) = 0
rt_sigaction(SIGCHLD, {0x41b4a0, [], SA_RESTORER|SA_NOCLDSTOP, 0x7f5af5a281e0}, NULL, 8) = 0
geteuid() = 1041
umask(0) = 022
brk(0) = 0x1198000
brk(0x11b9000) = 0x11b9000
open("/usr/lib/locale/locale-archive", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2942400, ...}) = 0
mmap(NULL, 2942400, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f5af5523000
close(3) = 0
open("/usr/etc/popt", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/etc/popt", O_RDONLY) = -1 ENOENT (No such file or directory)
stat("/etc/popt.d", 0x7fff5ac491b0) = -1 ENOENT (No such file or directory)
open("/home/un1t/.popt", O_RDONLY) = -1 ENOENT (No such file or directory)
rt_sigaction(SIGINT, {0x40b0e0, [], SA_RESTORER|SA_NOCLDSTOP, 0x7f5af5a281e0}, NULL, 8) = 0
rt_sigaction(SIGHUP, {0x40b0e0, [], SA_RESTORER|SA_NOCLDSTOP, 0x7f5af5a281e0}, NULL, 8) = 0
rt_sigaction(SIGTERM, {0x40b0e0, [], SA_RESTORER|SA_NOCLDSTOP, 0x7f5af5a281e0}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [HUP INT USR1 USR2 TERM CHLD], NULL, 8) = 0
rt_sigaction(SIGPIPE, {SIG_IGN, [], SA_RESTORER|SA_NOCLDSTOP, 0x7f5af5a281e0}, NULL, 8) = 0
rt_sigaction(SIGXFSZ, {SIG_IGN, [], SA_RESTORER|SA_NOCLDSTOP, 0x7f5af5a281e0}, NULL, 8) = 0
getcwd("/home/un1t", 4095) = 13
fcntl(0, F_GETFL) = 0 (flags O_RDONLY)
fcntl(0, F_SETFL, O_RDONLY|O_NONBLOCK) = 0
fcntl(1, F_GETFL) = 0x1 (flags O_WRONLY)
fcntl(1, F_SETFL, O_WRONLY|O_NONBLOCK) = 0
fcntl(0, F_GETFL) = 0x800 (flags O_RDONLY|O_NONBLOCK)
fcntl(1, F_GETFL) = 0x801 (flags O_WRONLY|O_NONBLOCK)
select(2, NULL, [1], [1], {60, 0}) = 1 (out [1], left {59, 999997})
write(1, "\36\0\0\0", 4) = 4
select(1, [0], [], NULL, {60, 0}) = 1 (in [0], left {59, 966985})
read(0, "", 4) = 0
write(2, «rsync: connection unexpectedly c»..., 74rsync: connection unexpectedly closed (0 bytes received so far) [receiver]) = 74
write(2, "\n", 1
) = 1
rt_sigaction(SIGUSR1, {SIG_IGN, [], SA_RESTORER, 0x7f5af5a281e0}, NULL, 8) = 0
rt_sigaction(SIGUSR2, {SIG_IGN, [], SA_RESTORER, 0x7f5af5a281e0}, NULL, 8) = 0
write(2, «rsync error: error in rsync prot»..., 88rsync error: error in rsync protocol data stream (code 12) at io.c(600) [receiver=3.0.6]) = 88
write(2, "\n", 1
) = 1
select(0, NULL, NULL, NULL, {0, 100000}) = 0 (Timeout)
exit_group(12) =?
Чесно говоря не особо понятно, кроме того что не моет найти какой-то файл /etc/ld.so.nohwcap
