我一直在阅读其他有关ls不返回结果或冻结和停止终端会话的 SF 线程，看来它们通常是网络问题造成的。但我的问题既发生在远程 SSH 会话中，也发生在我亲自在服务器本身时……
我刚刚在我们的一台服务器上安装了 CentOS 5.4。我正在设置一些 rdiff-backup 脚本，当我下载 librsync 并解压它时，我开始看到一些奇怪的行为ls -l。
wget http://sourceforge.net/projects/librsync/files/librsync/0.9.7/librsync-0.9.7.tar.gz/download /tmp
cd /tmp
tar -xzf librsync-0.9.7.tar.gz
很简单。要查看此目录中的文件，我执行以下操作：
ls
结果：
librsync-0.9.7 librsync-0.9.7.tar.gz
现在，如果我ls -l，我的终端就会冻结。我必须重新 ssh 才能继续。阅读 SF 线程后，我认为这与网络有关。
所以我非常惊讶地坐下来在服务器本身并看到完全一样的事情发生...所以这显然不是网络问题。
即使我ls /tmp/librsync-0.9.7，我的终端还是会冻结......
接下来我进行了 strace 并得到了这个（警告：即将出现大量文本......）：
strace ls -l /tmp
execve("/bin/ls", ["ls", "-l", "/tmp"], [/* 21 vars */]) = 0
brk(0) = 0x1c521000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b8582cc0000
uname({sys="Linux", node="massive.ourdomain.com", ...}) = 0
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=71746, ...}) = 0
mmap(NULL, 71746, PROT_READ, MAP_PRIVATE, 3, 0) = 0x2b8582cc1000
close(3) = 0
open("/lib64/librt.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 \"\200\2730\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=53448, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b8582cd3000
mmap(0x30bb800000, 2132936, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x30bb800000
mprotect(0x30bb807000, 2097152, PROT_NONE) = 0
mmap(0x30bba07000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x7000) = 0x30bba07000
close(3) = 0
open("/lib64/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\0\31@\2740\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=28008, ...}) = 0
mmap(0x30bc400000, 2120992, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x30bc400000
mprotect(0x30bc406000, 2093056, PROT_NONE) = 0
mmap(0x30bc605000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x5000) = 0x30bc605000
close(3) = 0
open("/lib64/libselinux.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`E\300\2730\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=95464, ...}) = 0
mmap(0x30bbc00000, 2192784, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x30bbc00000
mprotect(0x30bbc15000, 2097152, PROT_NONE) = 0
mmap(0x30bbe15000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x15000) = 0x30bbe15000
mmap(0x30bbe17000, 1424, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x30bbe17000
close(3) = 0
open("/lib64/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\220\332\201\2720\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1717800, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b8582cd4000
mmap(0x30ba800000, 3498328, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x30ba800000
mprotect(0x30ba94d000, 2097152, PROT_NONE) = 0
mmap(0x30bab4d000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x14d000) = 0x30bab4d000
mmap(0x30bab52000, 16728, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x30bab52000
close(3) = 0
open("/lib64/libpthread.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\220W\0\2730\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=145824, ...}) = 0
mmap(0x30bb000000, 2204528, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x30bb000000
mprotect(0x30bb016000, 2093056, PROT_NONE) = 0
mmap(0x30bb215000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x15000) = 0x30bb215000
mmap(0x30bb217000, 13168, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x30bb217000
close(3) = 0
open("/lib64/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\0\320\17\300\2750\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=17888, ...}) = 0
mmap(0x30bdc00000, 2110728, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x30bdc00000
mprotect(0x30bdc04000, 2093056, PROT_NONE) = 0
mmap(0x30bde03000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x30bde03000
close(3) = 0
open("/lib64/libdl.so.2", 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\20\16\300\2720\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=23360, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b8582cd5000
mmap(0x30bac00000, 2109696, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x30bac00000
mprotect(0x30bac02000, 2097152, PROT_NONE) = 0
mmap(0x30bae02000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x30bae02000
close(3) = 0
open("/lib64/libsepol.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\0=\0\2740\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=247496, ...}) = 0
mmap(0x30bc000000, 2383136, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x30bc000000
mprotect(0x30bc03b000, 2097152, PROT_NONE) = 0
mmap(0x30bc23b000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3b000) = 0x30bc23b000
mmap(0x30bc23c000, 40224, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x30bc23c000
close(3) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b8582cd6000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b8582cd7000
arch_prctl(ARCH_SET_FS, 0x2b8582cd6c50) = 0
mprotect(0x30bba07000, 4096, PROT_READ) = 0
mprotect(0x30bab4d000, 16384, PROT_READ) = 0
mprotect(0x30bb215000, 4096, PROT_READ) = 0
mprotect(0x30ba61b000, 4096, PROT_READ) = 0
mprotect(0x30bae02000, 4096, PROT_READ) = 0
munmap(0x2b8582cc1000, 71746) = 0
set_tid_address(0x2b8582cd6ce0) = 24102
set_robust_list(0x2b8582cd6cf0, 0x18) = 0
futex(0x7fff72d02d6c, FUTEX_WAKE_PRIVATE, 1) = 0
rt_sigaction(SIGRTMIN, {0x30bb005370, [], SA_RESTORER|SA_SIGINFO, 0x30bb00e7c0}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {0x30bb0052b0, [], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x30bb00e7c0}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=10240*1024, rlim_max=RLIM_INFINITY}) = 0
access("/etc/selinux/", F_OK) = 0
brk(0) = 0x1c521000
brk(0x1c542000) = 0x1c542000
open("/etc/selinux/config", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=448, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b8582cc1000
read(3, "# This file controls the state o"..., 4096) = 448
read(3, "", 4096) = 0
close(3) = 0
munmap(0x2b8582cc1000, 4096) = 0
open("/proc/mounts", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b8582cc1000
read(3, "rootfs / rootfs rw 0 0\n/dev/root"..., 4096) = 577
close(3) = 0
munmap(0x2b8582cc1000, 4096) = 0
open("/selinux/mls", O_RDONLY) = 3
read(3, "1", 19) = 1
close(3) = 0
socket(PF_FILE, SOCK_STREAM, 0) = 3
connect(3, {sa_family=AF_FILE, path="/var/run/setrans/.setrans-unix"...}, 110) = 0
sendmsg(3, {msg_name(0)=NULL, msg_iov(5)=[{"\1\0\0\0", 4}, {"\1\0\0\0", 4}, {"\1\0\0\0", 4}, {"\0", 1}, {"\0", 1}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 14
readv(3, [{"\1\0\0\0", 4}, {"\1\0\0\0", 4}, {"\0\0\0\0", 4}], 3) = 12
readv(3, [{"\0", 1}], 1) = 1
close(3) = 0
open("/usr/lib/locale/locale-archive", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=56413824, ...}) = 0
mmap(NULL, 56413824, PROT_READ, MAP_PRIVATE, 3, 0) = 0x2b8582cd8000
close(3) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, TIOCGWINSZ, {ws_row=65, ws_col=137, ws_xpixel=0, ws_ypixel=0}) = 0
open("/usr/share/locale/locale.alias", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2528, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b85862a5000
read(3, "# Locale name alias data base.\n#"..., 4096) = 2528
read(3, "", 4096) = 0
close(3) = 0
munmap(0x2b85862a5000, 4096) = 0
open("/usr/share/locale/en_US.UTF-8/LC_TIME/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en_US.utf8/LC_TIME/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en_US/LC_TIME/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en.UTF-8/LC_TIME/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en.utf8/LC_TIME/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en/LC_TIME/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
lstat("/tmp", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=4096, ...}) = 0
getxattr("/tmp", "system.posix_acl_access", 0x0, 0) = -1 ENODATA (No data available)
getxattr("/tmp", "system.posix_acl_default", 0x0, 0) = -1 ENODATA (No data available)
socket(PF_FILE, SOCK_STREAM, 0) = 3
fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0
connect(3, {sa_family=AF_FILE, path="/var/run/nscd/socket"...}, 110) = -1 ENOENT (No such file or directory)
close(3) = 0
socket(PF_FILE, SOCK_STREAM, 0) = 3
fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0
connect(3, {sa_family=AF_FILE, path="/var/run/nscd/socket"...}, 110) = -1 ENOENT (No such file or directory)
close(3) = 0
open("/etc/nsswitch.conf", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=1711, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b85862a5000
read(3, "#\n# /etc/nsswitch.conf\n#\n# An ex"..., 4096) = 1711
read(3, "", 4096) = 0
close(3) = 0
munmap(0x2b85862a5000, 4096) = 0
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=71746, ...}) = 0
mmap(NULL, 71746, PROT_READ, MAP_PRIVATE, 3, 0) = 0x2b85862a5000
close(3) = 0
open("/lib64/libnss_files.so.2", 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\37\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=53880, ...}) = 0
mmap(NULL, 2139432, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x2b85862b7000
mprotect(0x2b85862c1000, 2093056, PROT_NONE) = 0
mmap(0x2b85864c0000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x9000) = 0x2b85864c0000
close(3) = 0
mprotect(0x2b85864c0000, 4096, PROT_READ) = 0
munmap(0x2b85862a5000, 71746) = 0
open("/etc/passwd", O_RDONLY) = 3
fcntl(3, F_GETFD) = 0
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
fstat(3, {st_mode=S_IFREG|0644, st_size=1823, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b85862a5000
read(3, "root:x:0:0:root:/root:/bin/bash\n"..., 4096) = 1823
close(3) = 0
munmap(0x2b85862a5000, 4096) = 0
socket(PF_FILE, SOCK_STREAM, 0) = 3
fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0
connect(3, {sa_family=AF_FILE, path="/var/run/nscd/socket"...}, 110) = -1 ENOENT (No such file or directory)
close(3) = 0
socket(PF_FILE, SOCK_STREAM, 0) = 3
fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0
connect(3, {sa_family=AF_FILE, path="/var/run/nscd/socket"...}, 110) = -1 ENOENT (No such file or directory)
close(3) = 0
open("/etc/group", O_RDONLY) = 3
fcntl(3, F_GETFD) = 0
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
fstat(3, {st_mode=S_IFREG|0644, st_size=743, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b85862a5000
read(3, "root:x:0:root\nbin:x:1:root,bin,d"..., 4096) = 743
close(3) = 0
munmap(0x2b85862a5000, 4096) = 0
open("/tmp", O_RDONLY|O_NONBLOCK|O_DIRECTORY) = 3
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
getdents(3, /* 8 entries */, 32768) = 264
lstat("/tmp/librsync-0.9.7.tar.gz", {st_mode=S_IFREG|0644, st_size=453802, ...}) = 0
getxattr("/tmp/librsync-0.9.7.tar.gz", "system.posix_acl_access", 0x0, 0) = -1 ENODATA (No data available)
getxattr("/tmp/librsync-0.9.7.tar.gz", "system.posix_acl_default", 0x0, 0) = -1 ENODATA (No data available)
lstat("/tmp/librsync-0.9.7", {st_mode=S_IFDIR|0777, st_size=4096, ...}) = 0
getxattr("/tmp/librsync-0.9.7", "system.posix_acl_access", 0x0, 0) = -1 ENODATA (No data available)
getxattr("/tmp/librsync-0.9.7", "system.posix_acl_default", 0x0, 0) = -1 ENODATA (No data available)
open("/etc/passwd", O_RDONLY) = 4
fcntl(4, F_GETFD) = 0
fcntl(4, F_SETFD, FD_CLOEXEC) = 0
fstat(4, {st_mode=S_IFREG|0644, st_size=1823, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b85862a5000
read(4, "root:x:0:0:root:/root:/bin/bash\n"..., 4096) = 1823
read(4, "", 4096) = 0
close(4) = 0
munmap(0x2b85862a5000, 4096) = 0
open("/etc/ld.so.cache", O_RDONLY) = 4
fstat(4, {st_mode=S_IFREG|0644, st_size=71746, ...}) = 0
mmap(NULL, 71746, PROT_READ, MAP_PRIVATE, 4, 0) = 0x2b85862a5000
close(4) = 0
open("/lib64/libnss_ldap.so.2", O_RDONLY) = 4
read(4, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\300r\4\0\0\0\0\0"..., 832) = 832
fstat(4, {st_mode=S_IFREG|0755, st_size=3169960, ...}) = 0
mmap(NULL, 5329912, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 4, 0) = 0x2b85864c2000
mprotect(0x2b858679e000, 2093056, PROT_NONE) = 0
mmap(0x2b858699d000, 176128, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 4, 0x2db000) = 0x2b858699d000
mmap(0x2b85869c8000, 62456, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2b85869c8000
close(4) = 0
open("/lib64/libcom_err.so.2", O_RDONLY) = 4
read(4, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320\n\300\2770\0\0\0"..., 832) = 832
fstat(4, {st_mode=S_IFREG|0755, st_size=10000, ...}) = 0
mmap(0x30bfc00000, 2103048, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 4, 0) = 0x30bfc00000
mprotect(0x30bfc02000, 2093056, PROT_NONE) = 0
mmap(0x30bfe01000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 4, 0x1000) = 0x30bfe01000
close(4) = 0
open("/lib64/libkeyutils.so.1", O_RDONLY) = 4
read(4, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0`\n@\2760\0\0\0"..., 832) = 832
fstat(4, {st_mode=S_IFREG|0755, st_size=9472, ...}) = 0
mmap(0x30be400000, 2102416, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 4, 0) = 0x30be400000
mprotect(0x30be402000, 2093056, PROT_NONE) = 0
mmap(0x30be601000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 4, 0x1000) = 0x30be601000
close(4) = 0
open("/lib64/libresolv.so.2", O_RDONLY) = 4
read(4, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\2402\0\2760\0\0\0"..., 832) = 832
fstat(4, {st_mode=S_IFREG|0755, st_size=92736, ...}) = 0
mmap(0x30be000000, 2181864, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 4, 0) = 0x30be000000
mprotect(0x30be011000, 2097152, PROT_NONE) = 0
mmap(0x30be211000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 4, 0x11000) = 0x30be211000
mmap(0x30be213000, 6888, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x30be213000
close(4) = 0
mprotect(0x30be211000, 4096, PROT_READ) = 0
munmap(0x2b85862a5000, 71746) = 0
rt_sigaction(SIGPIPE, {0x1, [], SA_RESTORER, 0x30ba8302d0}, {SIG_DFL, [], 0}, 8) = 0
geteuid() = 0
futex(0x2b85869c7708, FUTEX_WAKE_PRIVATE, 2147483647) = 0
open("/etc/ldap.conf", O_RDONLY) = 4
fstat(4, {st_mode=S_IFREG|0644, st_size=9119, ...}) = 0
fstat(4, {st_mode=S_IFREG|0644, st_size=9119, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b85862a5000
read(4, "# @(#)$Id: ldap.conf,v 1.38 2006"..., 4096) = 4096
read(4, "Use the OpenLDAP password change"..., 4096) = 4096
read(4, " OpenLDAP 2.0 and earlier is \"no"..., 4096) = 927
read(4, "", 4096) = 0
close(4) = 0
munmap(0x2b85862a5000, 4096) = 0
uname({sys="Linux", node="massive.ourdomain.com", ...}) = 0
open("/etc/resolv.conf", O_RDONLY) = 4
fstat(4, {st_mode=S_IFREG|0644, st_size=107, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b85862a5000
read(4, "; generated by /sbin/dhclient-sc"..., 4096) = 107
read(4, "", 4096) = 0
close(4) = 0
munmap(0x2b85862a5000, 4096) = 0
socket(PF_FILE, SOCK_STREAM, 0) = 4
fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0
connect(4, {sa_family=AF_FILE, path="/var/run/nscd/socket"...}, 110) = -1 ENOENT (No such file or directory)
close(4) = 0
socket(PF_FILE, SOCK_STREAM, 0) = 4
fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0
connect(4, {sa_family=AF_FILE, path="/var/run/nscd/socket"...}, 110) = -1 ENOENT (No such file or directory)
close(4) = 0
open("/etc/host.conf", O_RDONLY) = 4
fstat(4, {st_mode=S_IFREG|0644, st_size=17, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b85862a5000
read(4, "order hosts,bind\n", 4096) = 17
read(4, "", 4096) = 0
close(4) = 0
munmap(0x2b85862a5000, 4096) = 0
futex(0x30bab54d44, FUTEX_WAKE_PRIVATE, 2147483647) = 0
open("/etc/hosts", O_RDONLY) = 4
fcntl(4, F_GETFD) = 0
fcntl(4, F_SETFD, FD_CLOEXEC) = 0
fstat(4, {st_mode=S_IFREG|0644, st_size=187, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b85862a5000
read(4, "# Do not remove the following li"..., 4096) = 187
read(4, "", 4096) = 0
close(4) = 0
munmap(0x2b85862a5000, 4096) = 0
open("/etc/ld.so.cache", O_RDONLY) = 4
fstat(4, {st_mode=S_IFREG|0644, st_size=71746, ...}) = 0
mmap(NULL, 71746, PROT_READ, MAP_PRIVATE, 4, 0) = 0x2b85862a5000
close(4) = 0
open("/lib64/libnss_dns.so.2", O_RDONLY) = 4
read(4, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340\17\0\0\0\0\0\0"..., 832) = 832
fstat(4, {st_mode=S_IFREG|0755, st_size=23736, ...}) = 0
mmap(NULL, 2113792, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 4, 0) = 0x2b85869d8000
mprotect(0x2b85869dc000, 2093056, PROT_NONE) = 0
mmap(0x2b8586bdb000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 4, 0x3000) = 0x2b8586bdb000
close(4) = 0
mprotect(0x2b8586bdb000, 4096, PROT_READ) = 0
munmap(0x2b85862a5000, 71746) = 0
socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 4
connect(4, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.10.20")}, 28) = 0
fcntl(4, F_GETFL) = 0x2 (flags O_RDWR)
fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0
gettimeofday({1276265920, 823870}, NULL) = 0
poll([{fd=4, events=POLLOUT}], 1, 0) = 1 ([{fd=4, revents=POLLOUT}])
sendto(4, "C\v\1\0\0\1\0\0\0\0\0\0\7massive\10ourdomain\3co"..., 38, MSG_NOSIGNAL, NULL, 0) = 38
poll([{fd=4, events=POLLIN}], 1, 5000) = 1 ([{fd=4, revents=POLLIN}])
ioctl(4, FIONREAD, [122]) = 0
recvfrom(4, "C\v\205\200\0\1\0\1\0\2\0\2\7massive\10ourdomain\3co"..., 1024, 0, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.10.20")}, [16]) = 122
close(4) = 0
open("/etc/openldap/ldap.conf", O_RDONLY) = 4
fstat(4, {st_mode=S_IFREG|0644, st_size=335, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b85862a5000
read(4, "#\n# LDAP Defaults\n#\n\n# See ldap."..., 4096) = 335
read(4, "", 4096) = 0
close(4) = 0
munmap(0x2b85862a5000, 4096) = 0
getuid() = 0
geteuid() = 0
getgid() = 0
getegid() = 0
open("/root/ldaprc", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/root/.ldaprc", O_RDONLY) = -1 ENOENT (No such file or directory)
stat("/etc/ldap.conf", {st_mode=S_IFREG|0644, st_size=9119, ...}) = 0
geteuid() = 0
brk(0x1c566000) = 0x1c566000
open("/etc/hosts", O_RDONLY) = 4
fcntl(4, F_GETFD) = 0
fcntl(4, F_SETFD, FD_CLOEXEC) = 0
fstat(4, {st_mode=S_IFREG|0644, st_size=187, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b85862a5000
read(4, "# Do not remove the following li"..., 4096) = 187
read(4, "", 4096) = 0
close(4) = 0
munmap(0x2b85862a5000, 4096) = 0
open("/etc/hosts", O_RDONLY) = 4
fcntl(4, F_GETFD) = 0
fcntl(4, F_SETFD, FD_CLOEXEC) = 0
fstat(4, {st_mode=S_IFREG|0644, st_size=187, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b85862a5000
read(4, "# Do not remove the following li"..., 4096) = 187
read(4, "", 4096) = 0
close(4) = 0
munmap(0x2b85862a5000, 4096) = 0
socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 4
connect(4, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.10.20")}, 28) = 0
fcntl(4, F_GETFL) = 0x2 (flags O_RDWR)
fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0
gettimeofday({1276265920, 855948}, NULL) = 0
poll([{fd=4, events=POLLOUT}], 1, 0) = 1 ([{fd=4, revents=POLLOUT}])
sendto(4, "\32 \1\0\0\1\0\0\0\0\0\0\4ldap\10ourdomain\3com\0\0"..., 35, MSG_NOSIGNAL, NULL, 0) = 35
poll([{fd=4, events=POLLIN}], 1, 5000) = 1 ([{fd=4, revents=POLLIN}])
ioctl(4, FIONREAD, [104]) = 0
recvfrom(4, "\32 \205\200\0\1\0\1\0\1\0\0\4ldap\10ourdomain\3com\0\0"..., 1024, 0, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.10.20")}, [16]) = 104
close(4) = 0
socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 4
connect(4, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.10.20")}, 28) = 0
fcntl(4, F_GETFL) = 0x2 (flags O_RDWR)
fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0
gettimeofday({1276265920, 858536}, NULL) = 0
poll([{fd=4, events=POLLOUT}], 1, 0) = 1 ([{fd=4, revents=POLLOUT}])
sendto(4, "I\375\1\0\0\1\0\0\0\0\0\0\4ldap\10ourdomain\3com\0\0"..., 35, MSG_NOSIGNAL, NULL, 0) = 35
poll([{fd=4, events=POLLIN}], 1, 5000) = 1 ([{fd=4, revents=POLLIN}])
ioctl(4, FIONREAD, [139]) = 0
recvfrom(4, "I\375\205\200\0\1\0\2\0\2\0\2\4ldap\10ourdomain\3com\0\0"..., 1024, 0, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.10.20")}, [16]) = 139
close(4) = 0
socket(PF_INET, SOCK_STREAM, IPPROTO_IP) = 4
fcntl(4, F_SETFD, FD_CLOEXEC) = 0
setsockopt(4, SOL_SOCKET, SO_KEEPALIVE, [1], 4) = 0
setsockopt(4, SOL_TCP, TCP_NODELAY, [1], 4) = 0
fcntl(4, F_GETFL) = 0x2 (flags O_RDWR)
fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0
connect(4, {sa_family=AF_INET, sin_port=htons(389), sin_addr=inet_addr("10.20.0.30")}, 16) = -1 EINPROGRESS (Operation now in progress)
poll([{fd=4, events=POLLOUT|POLLERR|POLLHUP}], 1, 120000
然后它就停在那里，就在最后 120000 之后......使用 strace，我显然可以按 CTRL+C 继续。但就像我说的，通常终端会完全冻结。
有人有任何线索吗？
更新
ls -l > out.txt 2> err.txt导致 out.txt 和 err.txt 文件为空。
ls -n确实返回了正确的结果。那么 GID 和 UID 的问题出在哪里呢？是像 Slobo 所说的 LDAP 问题吗？为什么当我列出文件时，我的服务器会尝试联系我们的 LDAP 服务器？
更新
正如你们指出的那样，问题实际上与 LDAP 有关。这是 LDAP 设置中的错误配置。谢谢大家
答案1
看起来它正在联系 ldap 服务器以获取有关提取文件的会计信息 - 它使用您的系统可能无法识别的 UID 进行解压。不确定为什么会产生这样的停顿 - 检查您的 LDAP 服务器日志？
答案2
ls -n 执行正常这一事实强烈表明 ls -l 挂起的原因是它无法将 UID 和 GID 编号转换为用户和组。解析这些内容由 '名称服务交换机'。这通常由 /etc/nsswitch.conf 文件配置。'passwd' 或 'groups' 行上的某些内容无法返回 UID 或 GID 的信息。您可以通过暂时从相应的行中删除方法来隔离可能的原因。
由于这是您正在扩展的 tarball，因此 tarball 中很可能有一些您系统中没有的文件的 UID/GID，因此需要很长时间才能解决。如果您不需要这些，或者只是想让您的存档正常工作，您可以尝试向提取命令添加一些选项：
tar --owner=yourname --group=users -xvf archive.tar
这会强制将提取文件的所有权设置为已知的良好值，从而允许 ls -l 在合理的时间内完成。