????2????????
root@localhost:~# lsof  -p  13721
COMMAND   PID     USER   FD   TYPE             DEVICE  SIZE/OFF     NODE NAME
nginx   13721 www-data  cwd    DIR              253??1      4096        2 /
nginx   13721 www-data  rtd    DIR              253??1      4096        2 /
nginx   13721 www-data  txt    REG              253??1    843688  1195996 /usr/sbin/nginx
nginx   13721 www-data  mem    REG              253??1     48024   269175 /lib/x86_64-linux-gnu/libnss_files-2.15.so
nginx   13721 www-data  mem    REG              253??1     47680   262260 /lib/x86_64-linux-gnu/libnss_nis-2.15.so
nginx   13721 www-data  mem    REG              253??1     97248   269169 /lib/x86_64-linux-gnu/libnsl-2.15.so
nginx   13721 www-data  mem    REG              253??1     35680   269174 /lib/x86_64-linux-gnu/libnss_compat-2.15.so
nginx   13721 www-data  mem    REG              253??1   1807032   269167 /lib/x86_64-linux-gnu/libc-2.15.so
nginx   13721 www-data  mem    REG              253??1    215136  1186378 /usr/lib/libGeoIP.so.1.4.8
nginx   13721 www-data  mem    REG              253??1    270400  1181963 /usr/lib/x86_64-linux-gnu/libgd.so.2.0.0
nginx   13721 www-data  mem    REG              253??1     84928  1195989 /usr/lib/x86_64-linux-gnu/libexslt.so.0.8.15
nginx   13721 www-data  mem    REG              253??1     43288   269172 /lib/x86_64-linux-gnu/libcrypt-2.15.so
nginx   13721 www-data  mem    REG              253??1    135366   269170 /lib/x86_64-linux-gnu/libpthread-2.15.so
nginx   13721 www-data  mem    REG              253??1    149280   269173 /lib/x86_64-linux-gnu/ld-2.15.so
nginx   13721 www-data  DEL    REG                0??4            6150828 /dev/zero
nginx   13721 www-data    0u   CHR                1??3       0t0     1029 /dev/null
nginx   13721 www-data    1u   CHR                1??3       0t0     1029 /dev/null
nginx   13721 www-data    4w   REG              253??1     85704   918896 /var/log/nginx/access.log
nginx   13721 www-data   13u  unix 0xffff8807ff4ef500       0t0 59526717 socket
nginx   13721 www-data   14w   REG              253??1    438012   918916 /var/log/nginx/admin.access.log
nginx   13721 www-data   15u  IPv4            6150826       0t0      TCP *:http (LISTEN)
nginx   13721 www-data   16u  IPv4            6150827       0t0      TCP *:http-alt (LISTEN)
nginx   13721 www-data   19u  unix 0xffff8807ff4ee900       0t0 59526719 socket
nginx   13721 www-data   20u  IPv4          140132456       0t0      TCP 124.46.185.34:http->140.205.127.60:16099 (ESTABLISHED)
nginx   13721 www-data   21u  unix 0xffff8807ff4ebf00       0t0 59526721 socket
nginx   13721 www-data   22u  IPv4          140132818       0t0      TCP 124.46.185.34:http->140.205.127.17:33358 (ESTABLISHED)
nginx   13721 www-data   23u  unix 0xffff8807ff4ee600       0t0 59526723 socket
nginx   13721 www-data   24u  IPv4          140132826       0t0      TCP 124.46.185.34:http->198.11.137.59:25415 (ESTABLISHED)
nginx   13721 www-data   25u  unix 0xffff8807ff4e9200       0t0 59526725 socket
nginx   13721 www-data   26u  IPv4          140106470       0t0      TCP 124.46.185.34:http->101.200.101.204:37659 (ESTABLISHED)
nginx   13721 www-data   27u  IPv4          140106678       0t0      TCP 124.46.185.34:http->140.205.127.34:53569 (ESTABLISHED)
nginx   13721 www-data   30u  IPv4          140132831       0t0      TCP 124.46.185.34:http->140.205.127.44:8165 (ESTABLISHED)
nginx   13721 www-data   31u  IPv4          140132828       0t0      TCP 124.46.185.34:http->47.88.135.31:64913 (ESTABLISHED)
nginx   13721 www-data   33u  IPv4          140132871       0t0      TCP 124.46.185.34:http->140.205.31.220:57845 (ESTABLISHED)
nginx   13721 www-data   34u  IPv4          140132842       0t0      TCP 124.46.185.34:http->195.27.31.56:55498 (ESTABLISHED)
nginx   13721 www-data   35u  IPv4          140132679       0t0      TCP 124.46.185.34:http->140.205.127.26:62043 (ESTABLISHED)
nginx   13721 www-data   36u  IPv4          140132838       0t0      TCP 124.46.185.34:http->140.205.127.26:64949 (ESTABLISHED)
nginx   13721 www-data   37u  unix 0xffff8807ff4ef200       0t0 59526727 socket
nginx   13721 www-data   38u  IPv4          140132862       0t0      TCP 124.46.185.34:http->140.205.127.25:23082 (ESTABLISHED)
nginx   13721 www-data   39u  unix 0xffff8807ff4ea700       0t0 59526729 socket
nginx   13721 www-data   41u  unix 0xffff8807ff4ec200       0t0 59526731 socket
nginx   13721 www-data   42u  IPv4          140132845       0t0      TCP 124.46.185.34:http->101.200.101.216:55441 (ESTABLISHED)
nginx   13721 www-data   43u  unix 0xffff8807ff4eb900       0t0 59526733 socket
nginx   13721 www-data   44u  IPv4          140106547       0t0      TCP 124.46.185.34:http->140.205.31.211:60180 (ESTABLISHED)
nginx   13721 www-data   45u  unix 0xffff8807ff4e9b00       0t0 59526735 socket
nginx   13721 www-data   46u  IPv4          140132879       0t0      TCP 124.46.185.34:http->140.205.31.203:42821 (ESTABLISHED)
nginx   13721 www-data   47u  unix 0xffff8807ff4e8300       0t0 59526737 socket
nginx   13721 www-data   48u  IPv4          140132847       0t0      TCP 124.46.185.34:http->140.205.127.45:53830 (ESTABLISHED)
nginx   13721 www-data   49u  unix 0xffff8807ff4ee000       0t0 59526739 socket
nginx   13721 www-data   50u  IPv4          140077698       0t0      TCP 124.46.185.34:http->140.205.127.43:43558 (ESTABLISHED)
nginx   13721 www-data   51u  unix 0xffff8807ff4ed400       0t0 59526741 socket
nginx   13721 www-data   52u  IPv4          140132857       0t0      TCP 124.46.185.34:http->198.11.137.19:22613 (ESTABLISHED)
nginx   13721 www-data   53u  unix 0xffff8807ff4ece00       0t0 59526743 socket
nginx   13721 www-data   55u  unix 0xffff8807ff4e8000       0t0 59526745 socket
nginx   13721 www-data   56u  IPv4          140132853       0t0      TCP 124.46.185.34:http->140.205.31.212:23679 (ESTABLISHED)
nginx   13721 www-data   57u  IPv4          140132859       0t0      TCP 124.46.185.34:http->140.205.127.61:7242 (ESTABLISHED)
nginx   13721 www-data   58u  unix 0xffff8807ff4e9800       0t0 59526748 socket
nginx   13721 www-data   59u  IPv4          140132864       0t0      TCP 124.46.185.34:http->101.200.101.201:35787 (ESTABLISHED)
nginx   13721 www-data   70u  IPv4          140093317       0t0      TCP 124.46.185.34:http->140.205.127.34:37276 (ESTABLISHED)
nginx   13721 www-data   80u  0000                0??9         0     6874 anon_inode
nginx   13721 www-data   87u  IPv4          140105862       0t0      TCP 124.46.185.34:http->140.205.127.11:40316 (ESTABLISHED)
nginx   13721 www-data   88u  IPv4          140093346       0t0      TCP 124.46.185.34:http->140.205.127.36:29659 (ESTABLISHED)
????3??lsof -c init
root@iZ25n2yx37sZ:~#  lsof -c init
COMMAND PID USER   FD   TYPE             DEVICE SIZE/OFF   NODE NAME
init      1 root  cwd    DIR              253??1     4096      2 /
init      1 root  rtd    DIR              253??1     4096      2 /
init      1 root  txt    REG              253??1   167192 393221 /sbin/init
init      1 root  mem    REG              253??1    48024 269175 /lib/x86_64-linux-gnu/libnss_files-2.15.so
init      1 root  mem    REG              253??1    47680 262260 /lib/x86_64-linux-gnu/libnss_nis-2.15.so
init      1 root  mem    REG              253??1    97248 269169 /lib/x86_64-linux-gnu/libnsl-2.15.so
init      1 root  mem    REG              253??1    35680 269174 /lib/x86_64-linux-gnu/libnss_compat-2.15.so
init      1 root  mem    REG              253??1  1807032 269167 /lib/x86_64-linux-gnu/libc-2.15.so
init      1 root  mem    REG              253??1    31752 262372 /lib/x86_64-linux-gnu/librt-2.15.so
init      1 root  mem    REG              253??1   135366 269170 /lib/x86_64-linux-gnu/libpthread-2.15.so
init      1 root  mem    REG              253??1   276392 262185 /lib/x86_64-linux-gnu/libdbus-1.so.3.5.8
init      1 root  mem    REG              253??1    38888 262171 /lib/x86_64-linux-gnu/libnih-dbus.so.1.0.0
init      1 root  mem    REG              253??1    96240 262174 /lib/x86_64-linux-gnu/libnih.so.1.0.0
init      1 root  mem    REG              253??1   149280 269173 /lib/x86_64-linux-gnu/ld-2.15.so
init      1 root    0u   CHR                1??3      0t0   1029 /dev/null
init      1 root    1u   CHR                1??3      0t0   1029 /dev/null
init      1 root    2u   CHR                1??3      0t0   1029 /dev/null
init      1 root    3r  FIFO                0??8      0t0   7012 pipe
init      1 root    4w  FIFO                0??8      0t0   7012 pipe
init      1 root    5r  0000                0??9        0   6874 anon_inode
init      1 root    6r  0000                0??9        0   6874 anon_inode
init      1 root    7u  unix 0xffff88080b948000      0t0   7013 socket
init      1 root    8u  unix 0xffff88080b918600      0t0  12351 socket
init      1 root    9u  unix 0xffff880807670c00      0t0   1238 socket
init      1 root   10u  unix 0xffff8808076a9500      0t0   7100 socket
init      1 root   11w   REG              253??1      633 919710 /var/log/upstart/mysql.log.1 (deleted)
init      1 root   23u   CHR                5??2      0t0   1111 /dev/ptmx