刪除仍在重定向輸出的文件

Question

我已經運行了幾天的程序，將其輸出重定向到日志文件，如下所示：

~$ myprog > LOG

錯誤地，我已經刪除了LOG文件，並且我再也看不到LOG的進度。 我嘗試過再次制作日志文件

~$ touch LOG

但是它沒有用。 該程序仍在運行，將再運行2天，因此仍有一些日志值得一看。

有什么辦法可以查看此問題下的輸出？

更新：這是lsof -p [pid]的輸出。 LOG所在的文件夾是第一個條目/home/cristobal/potts_exacto/pfamilyd-1.0.0

cristobal@fdyn-1:~$ lsof -p 18510
COMMAND     PID      USER   FD   TYPE             DEVICE SIZE/OFF     NODE NAME
pfamilyd- 18510 cristobal  cwd    DIR                8,6        0  8126487 /home/cristobal/potts_exacto/pfamilyd-1.0.0 (deleted)
pfamilyd- 18510 cristobal  rtd    DIR                8,5     4096        2 /
pfamilyd- 18510 cristobal  txt    REG                8,6   329460  8126501 /home/cristobal/potts_exacto/pfamilyd-1.0.0/bin/pfamilyd-1.0.0 (deleted)
pfamilyd- 18510 cristobal  mem    REG                8,5 67113040  6423790 /tmp/openmpi-sessions-cristobal@fdyn-1_0/3193/1/shared_mem_pool.fdyn-1
pfamilyd- 18510 cristobal  mem    REG                8,5    58296  3281676 /usr/lib/openmpi/lib/openmpi/mca_osc_rdma.so
pfamilyd- 18510 cristobal  mem    REG                8,5    50328  3281644 /usr/lib/openmpi/lib/openmpi/mca_osc_pt2pt.so
pfamilyd- 18510 cristobal  mem    REG                8,5    96656  3281624 /usr/lib/openmpi/lib/openmpi/mca_coll_tuned.so
pfamilyd- 18510 cristobal  mem    REG                8,5    14648  3281687 /usr/lib/openmpi/lib/openmpi/mca_coll_sync.so
pfamilyd- 18510 cristobal  mem    REG                8,5    23032  3281653 /usr/lib/openmpi/lib/openmpi/mca_coll_sm.so
pfamilyd- 18510 cristobal  mem    REG                8,5    10352  3281672 /usr/lib/openmpi/lib/openmpi/mca_coll_self.so
pfamilyd- 18510 cristobal  mem    REG                8,5    14448  3281648 /usr/lib/openmpi/lib/openmpi/mca_coll_inter.so
pfamilyd- 18510 cristobal  mem    REG                8,5    34960  3281659 /usr/lib/openmpi/lib/openmpi/mca_coll_basic.so
pfamilyd- 18510 cristobal  mem    REG                8,5    50360  3281631 /usr/lib/openmpi/lib/openmpi/mca_btl_tcp.so
pfamilyd- 18510 cristobal  mem    REG                8,5    29624  3281661 /usr/lib/openmpi/lib/openmpi/mca_btl_sm.so
pfamilyd- 18510 cristobal  mem    REG                8,5    16184  3281698 /usr/lib/openmpi/lib/openmpi/mca_btl_self.so
pfamilyd- 18510 cristobal  mem    REG                8,5    18960  3281651 /usr/lib/openmpi/lib/openmpi/mca_bml_r2.so
pfamilyd- 18510 cristobal  mem    REG                8,5    87416  3281695 /usr/lib/openmpi/lib/openmpi/mca_pml_ob1.so
pfamilyd- 18510 cristobal  mem    REG                8,5    23080  3281662 /usr/lib/openmpi/lib/openmpi/mca_dpm_orte.so
pfamilyd- 18510 cristobal  mem    REG                8,5    22800  3281703 /usr/lib/openmpi/lib/openmpi/mca_coll_hierarch.so
pfamilyd- 18510 cristobal  mem    REG                8,5    14688  3281674 /usr/lib/openmpi/lib/openmpi/mca_pubsub_orte.so
pfamilyd- 18510 cristobal  mem    REG                8,5    10464  3281379 /usr/lib/openmpi/lib/libmca_common_sm.so.2.0.0
pfamilyd- 18510 cristobal  mem    REG                8,5    10560  3281652 /usr/lib/openmpi/lib/openmpi/mca_mpool_sm.so
pfamilyd- 18510 cristobal  mem    REG                8,5    14632  3281665 /usr/lib/openmpi/lib/openmpi/mca_mpool_rdma.so
pfamilyd- 18510 cristobal  mem    REG                8,5     6248  3281658 /usr/lib/openmpi/lib/openmpi/mca_mpool_fake.so
pfamilyd- 18510 cristobal  mem    REG                8,5    14680  3281692 /usr/lib/openmpi/lib/openmpi/mca_rcache_vma.so
pfamilyd- 18510 cristobal  mem    REG                8,5    10456  3281634 /usr/lib/openmpi/lib/openmpi/mca_allocator_bucket.so
pfamilyd- 18510 cristobal  mem    REG                8,5    52120  1969739 /lib/x86_64-linux-gnu/libnss_files-2.15.so
pfamilyd- 18510 cristobal  mem    REG                8,5    47680  1969743 /lib/x86_64-linux-gnu/libnss_nis-2.15.so
pfamilyd- 18510 cristobal  mem    REG                8,5    97248  1969755 /lib/x86_64-linux-gnu/libnsl-2.15.so
pfamilyd- 18510 cristobal  mem    REG                8,5    35680  1969737 /lib/x86_64-linux-gnu/libnss_compat-2.15.so
pfamilyd- 18510 cristobal  mem    REG                8,5    18792  3281636 /usr/lib/openmpi/lib/openmpi/mca_grpcomm_bad.so
pfamilyd- 18510 cristobal  mem    REG                8,5    18928  3281680 /usr/lib/openmpi/lib/openmpi/mca_routed_binomial.so
pfamilyd- 18510 cristobal  mem    REG                8,5    66936  3281632 /usr/lib/openmpi/lib/openmpi/mca_oob_tcp.so
pfamilyd- 18510 cristobal  mem    REG                8,5    23544  3281668 /usr/lib/openmpi/lib/openmpi/mca_rml_oob.so
pfamilyd- 18510 cristobal  mem    REG                8,5    10552  3281649 /usr/lib/openmpi/lib/openmpi/mca_allocator_basic.so
pfamilyd- 18510 cristobal  mem    REG                8,5    14800  3281614 /usr/lib/openmpi/lib/openmpi/mca_ess_env.so
pfamilyd- 18510 cristobal  mem    REG                8,5    10624  3281682 /usr/lib/openmpi/lib/openmpi/mca_crs_none.so
pfamilyd- 18510 cristobal  mem    REG                8,5     6160  3281689 /usr/lib/openmpi/lib/openmpi/mca_carto_auto_detect.so
pfamilyd- 18510 cristobal  mem    REG                8,5   105288  1969740 /lib/x86_64-linux-gnu/libresolv-2.15.so
pfamilyd- 18510 cristobal  mem    REG                8,5    92720  1966309 /lib/x86_64-linux-gnu/libz.so.1.2.3.4
pfamilyd- 18510 cristobal  mem    REG                8,5    48248  1966115 /lib/x86_64-linux-gnu/libpci.so.3.1.8
pfamilyd- 18510 cristobal  mem    REG                8,5    43976  2889513 /usr/lib/libnuma.so.1
pfamilyd- 18510 cristobal  mem    REG                8,5  1421464  2893526 /usr/lib/x86_64-linux-gnu/libxml2.so.2.7.8
pfamilyd- 18510 cristobal  mem    REG                8,5   153424  2889517 /usr/lib/x86_64-linux-gnu/libhwloc.so.4.1.4
pfamilyd- 18510 cristobal  mem    REG                8,5    14736  3281693 /usr/lib/openmpi/lib/openmpi/mca_paffinity_hwloc.so
pfamilyd- 18510 cristobal  mem    REG                8,5   450520  2893570 /usr/lib/x86_64-linux-gnu/libgmp.so.10.0.2
pfamilyd- 18510 cristobal  mem    REG                8,5    39184  2889506 /usr/lib/x86_64-linux-gnu/libltdl.so.7.3.0
pfamilyd- 18510 cristobal  mem    REG                8,5    10632  1969734 /lib/x86_64-linux-gnu/libutil-2.15.so
pfamilyd- 18510 cristobal  mem    REG                8,5  1595096  2893433 /usr/lib/libcln.so.6.0.2
pfamilyd- 18510 cristobal  mem    REG                8,5    14768  1969750 /lib/x86_64-linux-gnu/libdl-2.15.so
pfamilyd- 18510 cristobal  mem    REG                8,5  1815224  1969735 /lib/x86_64-linux-gnu/libc-2.15.so
pfamilyd- 18510 cristobal  mem    REG                8,5   135366  1969744 /lib/x86_64-linux-gnu/libpthread-2.15.so
pfamilyd- 18510 cristobal  mem    REG                8,5    88384  1966124 /lib/x86_64-linux-gnu/libgcc_s.so.1
pfamilyd- 18510 cristobal  mem    REG                8,5  1030512  1969746 /lib/x86_64-linux-gnu/libm-2.15.so
pfamilyd- 18510 cristobal  mem    REG                8,5   962656  2888558 /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.16
pfamilyd- 18510 cristobal  mem    REG                8,5  1358656  3281445 /usr/lib/openmpi/lib/libmpi.so.1.0.2
pfamilyd- 18510 cristobal  mem    REG                8,5   106024  3281449 /usr/lib/openmpi/lib/libmpi_cxx.so.1.0.1
pfamilyd- 18510 cristobal  mem    REG                8,5  2826576  2896899 /usr/lib/libginac.so.2.1.0
pfamilyd- 18510 cristobal  mem    REG                8,5   149280  1969747 /lib/x86_64-linux-gnu/ld-2.15.so
pfamilyd- 18510 cristobal  mem    REG                8,5      296  6423791 /tmp/openmpi-sessions-cristobal@fdyn-1_0/3193/1/shared_mem_btl_module.fdyn-1
pfamilyd- 18510 cristobal    0r  FIFO                0,8      0t0 64137792 pipe
pfamilyd- 18510 cristobal    1u   CHR              136,2      0t0        5 /dev/pts/2
pfamilyd- 18510 cristobal    2w  FIFO                0,8      0t0 64137793 pipe
pfamilyd- 18510 cristobal    3w   CHR                5,0      0t0     1037 /dev/tty
pfamilyd- 18510 cristobal    4r   DIR                8,5     4096        2 /
pfamilyd- 18510 cristobal    5u  0000                0,9        0     6115 anon_inode
pfamilyd- 18510 cristobal    6u  unix 0x0000000000000000      0t0 64138322 socket
pfamilyd- 18510 cristobal    7u  unix 0x0000000000000000      0t0 64138323 socket
pfamilyd- 18510 cristobal    8u  IPv4           64138325      0t0      TCP *:35872 (LISTEN)
pfamilyd- 18510 cristobal    9u  IPv4           64138328      0t0      TCP fdyn-1:60450->fdyn-1:37741 (ESTABLISHED)
pfamilyd- 18510 cristobal   10u  IPv4           64138331      0t0      TCP *:1027 (LISTEN)
pfamilyd- 18510 cristobal   11w   REG                8,6        5  8388683 /home/cristobal/lattices/kago_9xn/kago_9xn.slat.pfamily.mat.0
pfamilyd- 18510 cristobal   12u  IPv4           64138332      0t0      TCP fdyn-1:33727->fdyn-2:1024 (ESTABLISHED)
pfamilyd- 18510 cristobal   13u  IPv4           64138333      0t0      TCP fdyn-1:44117->fdyn-3:1028 (ESTABLISHED)
pfamilyd- 18510 cristobal   14u  IPv4           64138334      0t0      TCP fdyn-1:1027->fdyn-2:52461 (ESTABLISHED)
pfamilyd- 18510 cristobal   15u  IPv4           64138335      0t0      TCP fdyn-1:1027->fdyn-3:41435 (ESTABLISHED)
pfamilyd- 18510 cristobal   16u  IPv4           64138336      0t0      TCP fdyn-1:1027->fdyn-3:41436 (ESTABLISHED)
pfamilyd- 18510 cristobal   17u  IPv4           64138337      0t0      TCP fdyn-1:1027->fdyn-4:57026 (ESTABLISHED)
pfamilyd- 18510 cristobal   18u  IPv4           64138338      0t0      TCP fdyn-1:1027->fdyn-3:41438 (ESTABLISHED)
pfamilyd- 18510 cristobal   19u  IPv4           64138339      0t0      TCP fdyn-1:1027->fdyn-4:57027 (ESTABLISHED)
pfamilyd- 18510 cristobal   20u  IPv4           64138340      0t0      TCP fdyn-1:1027->fdyn-4:57029 (ESTABLISHED)
pfamilyd- 18510 cristobal   21u  IPv4           64138341      0t0      TCP fdyn-1:1027->fdyn-4:57030 (ESTABLISHED)
pfamilyd- 18510 cristobal   22u  IPv4           64138342      0t0      TCP fdyn-1:1027->fdyn-3:41439 (ESTABLISHED)
pfamilyd- 18510 cristobal   23u  IPv4           64138343      0t0      TCP fdyn-1:1027->fdyn-4:57032 (ESTABLISHED)
pfamilyd- 18510 cristobal   24u  IPv4           64138344      0t0      TCP fdyn-1:1027->fdyn-4:57033 (ESTABLISHED)
pfamilyd- 18510 cristobal   25w  FIFO                0,8      0t0 64137794 pipe
pfamilyd- 18510 cristobal   26u  IPv4           64138345      0t0      TCP fdyn-1:1027->fdyn-2:52462 (ESTABLISHED)
pfamilyd- 18510 cristobal   27u  IPv4           64138346      0t0      TCP fdyn-1:1027->fdyn-2:52463 (ESTABLISHED)
pfamilyd- 18510 cristobal   28u  IPv4           64138347      0t0      TCP fdyn-1:1027->fdyn-2:52464 (ESTABLISHED)
pfamilyd- 18510 cristobal   29u  IPv4           64138348      0t0      TCP fdyn-1:1027->fdyn-4:57034 (ESTABLISHED)
pfamilyd- 18510 cristobal   30u  IPv4           64138349      0t0      TCP fdyn-1:1027->fdyn-2:52465 (ESTABLISHED)
pfamilyd- 18510 cristobal   31u  IPv4           64138350      0t0      TCP fdyn-1:1027->fdyn-3:41440 (ESTABLISHED)
pfamilyd- 18510 cristobal   32u  IPv4           64138351      0t0      TCP fdyn-1:1027->fdyn-3:41441 (ESTABLISHED)
pfamilyd- 18510 cristobal   33u  IPv4           64138352      0t0      TCP fdyn-1:1027->fdyn-3:41442 (ESTABLISHED)
pfamilyd- 18510 cristobal   34u  IPv4           64138353      0t0      TCP fdyn-1:1027->fdyn-2:52466 (ESTABLISHED)
pfamilyd- 18510 cristobal   35u  IPv4           64138354      0t0      TCP fdyn-1:1027->fdyn-4:57035 (ESTABLISHED)
pfamilyd- 18510 cristobal   36u  IPv4           64138356      0t0      TCP fdyn-1:1027->fdyn-2:52467 (ESTABLISHED)

附加信息：我不確定這是否會改變方案。 但是該程序是一個正在運行在屏幕會話上的MPI程序（32個進程，因此還有31個其他PID的編號接近18510，這是我監控的編號）。 從一開始到我刪除文件的過程如下：

~$ cd path_to_pfamilyd-1.0.0
~$ screen -S my_screen_session 
~$ mpirun -np 32 ./myprog [args] > LOG
~$ Crtl + A + D
~$ some days layer, by mistake i did: rm -r path_to_pfamilyd-1.0.0, and installed another version.
~$ program is still running...

Answer 1

簡單的解決方案：

1. 使用lsof -p [pid]找出進程打開了哪些文件。 確定您感興趣的文件的fd。
2. 然后tail -f /proc/[pid]/fd/[file-descriptor] ，其中[file-descriptor]是您在步驟1中標識的那個。

Answer 2

請檢查您在bash腳本中提供的路徑。 通常，“>”重定向符號具有多種功能，也可用於創建新文件。 如果您刪除了該文件，則會在有有效權限的情況下在腳本中的下一次運行時再次在定義的路徑上創建該文件。 但是您將無法在刪除之前恢復舊日志。 新的日志將出現在新創建的日志文件中。

您可以使用附加重定向'>>'代替直接重定向，以防止先前的數據丟失，因為每次運行腳本時'>'都會截斷舊文件。

如果仍然錯過了日志文件路徑，也可以使用其他搜索命令，例如locate，find等給出日期時間標准。

如果在特定時間計划，請嘗試在crontab的命令腳本末尾添加“> / dev / null 2>＆1＆”以支持日志進度。