我写了一个 Cron Job 但它没有运行。知道为什么它不运行吗？
这是我希望运行的 Cron 作业：
#
#
# (day of month) (day of week)
# min hou dom (day of month) mon dow (day of week) command
* * * * * /usr/bin/touch /DATA/z_test_$(date '+%Y-%m-%d_T%H-%M').txt >/dev/null 2>&1
它应该每分钟运行一次。
我希望它创建一个空文件并将其保存在 /DATA/ 目录中。
这是我的文件系统的根目录：
Tue Apr 11 [srv_data@Ora1 /home/michal]$ ls -lah /
total 28K
dr-xr-xr-x. 18 root root 236 Apr 3 10:52 .
dr-xr-xr-x. 18 root root 236 Apr 3 10:52 ..
lrwxrwxrwx. 1 root root 7 Oct 9 2021 bin -> usr/bin
dr-xr-xr-x. 5 root root 4.0K Mar 27 11:22 boot
drwxrwx--x. 2 srv_data srv_data 4.0K Apr 11 14:51 DATA
drwxr-xr-x. 18 root root 3.2K Apr 4 12:20 dev
drwxr-xr-x. 115 root root 8.0K Apr 5 14:37 etc
drwxr-xr-x. 4 root root 36 Apr 6 08:58 home
lrwxrwxrwx. 1 root root 7 Oct 9 2021 lib -> usr/lib
lrwxrwxrwx. 1 root root 9 Oct 9 2021 lib64 -> usr/lib64
drwxr-xr-x. 2 root root 6 Oct 9 2021 media
drwxr-xr-x. 2 root root 6 Oct 9 2021 mnt
drwxr-xr-x. 2 root root 6 Oct 9 2021 opt
dr-xr-xr-x. 304 root root 0 Apr 4 12:20 proc
dr-xr-x---. 3 root root 163 Apr 11 12:04 root
drwxr-xr-x. 39 root root 1.1K Apr 4 12:20 run
lrwxrwxrwx. 1 root root 8 Oct 9 2021 sbin -> usr/sbin
drwxr-xr-x. 2 root root 6 Oct 9 2021 srv
dr-xr-xr-x. 13 root root 0 Apr 4 12:20 sys
drwxrwxrwt. 6 root root 4.0K Apr 11 15:14 tmp
drwxr-xr-x. 13 root root 158 Mar 20 13:08 usr
drwxr-xr-x. 22 root root 4.0K Mar 28 08:54 var
我以用户身份运行此 Cron 作业'srv_data'，该用户有权在 /DATA/ 目录中创建和保存文件。
我也尝试过使用此命令并从用户运行它'srv_data'并且它有效。它在我期望的位置创建文件。
Tue Apr 11 [srv_data@Ora1 /home/michal]$ ls -lah /DATA
total 20K
drwxrwx--x. 2 srv_data srv_data 4.0K Apr 11 15:31 .
dr-xr-xr-x. 18 root root 236 Apr 3 10:52 ..
-rwxrwx--x. 1 srv_data srv_data 1.7K Apr 4 10:14 blade_runner_the_movie_1982
-rw-r--r--. 1 srv_data srv_data 960 Apr 11 15:00 file_with_dates
-rwxrwx--x. 1 srv_data srv_data 2.2K Apr 4 10:09 mud_the_movie_2012
-rw-r--r--. 1 root root 0 Apr 11 12:43 reczny_plik_01
-rw-r--r--. 1 root root 0 Apr 11 12:43 reczny_plik_02
-rw-r--r--. 1 root root 0 Apr 11 12:43 reczny_plik_03
-rw-r--r--. 1 root root 0 Apr 11 12:43 reczny_plik_04
-rw-r--r--. 1 root root 0 Apr 11 12:45 reczny_plik_05
-rw-r--r--. 1 root root 0 Apr 11 12:45 reczny_plik_06
-rw-r--r--. 1 root root 0 Apr 11 12:45 reczny_plik_07
-rw-r--r--. 1 root root 0 Apr 11 12:45 reczny_plik_08
-rw-r--r--. 1 root root 0 Apr 11 12:45 reczny_plik_09
-rwxrwx--x. 1 srv_data srv_data 66 Apr 3 11:18 synch_test_00
-rw-rw-r--. 1 srv_data srv_data 0 Apr 7 15:06 test_2023-04-07_T1506
-rw-rw-r--. 1 srv_data srv_data 0 Apr 7 15:14 test_2023-04-07_T1514
-rw-rw-r--. 1 srv_data srv_data 0 Apr 7 15:17 test_2023-04-07_T1517
-rw-rw-r--. 1 srv_data srv_data 0 Apr 7 15:22 test_2023-04-07_T15-22.txt
-rw-rw-r--. 1 michal michal 0 Apr 11 14:46 z_test_2023-04-11_T14-46.txt
-rw-rw-r--. 1 michal michal 0 Apr 11 14:51 z_test_2023-04-11_T14-51.txt
-rw-rw-r--. 1 srv_data srv_data 0 Apr 11 15:31 z_test_2023-04-11_T15-31.txt
这是文件的内容/var/log/cron。
Apr 11 14:54:01 Ora1 CROND[22557]: (srv_data) CMD (/usr/bin/touch /DATA/z_test_$(date '+)
Apr 11 14:54:01 Ora1 CROND[22559]: (srv_data) CMD (/home/srv_data/sync.sh)
Apr 11 14:54:01 Ora1 CROND[22543]: (srv_data) CMDOUT (/bin/sh: -c: line 0: unexpected EOF while looking for matching `'')
Apr 11 14:54:01 Ora1 CROND[22543]: (srv_data) CMDOUT (/bin/sh: -c: line 1: syntax error: unexpected end of file)
Apr 11 14:54:02 Ora1 CROND[22542]: (srv_data) CMDOUT (sending incremental file list)
Apr 11 14:54:02 Ora1 CROND[22542]: (srv_data) CMDOUT ()
Apr 11 14:54:02 Ora1 CROND[22542]: (srv_data) CMDOUT (sent 602 bytes received 12 bytes 409.33 bytes/sec)
Apr 11 14:54:02 Ora1 CROND[22542]: (srv_data) CMDOUT (total size is 4,970 speedup is 8.09)
Apr 11 14:55:01 Ora1 CROND[22586]: (srv_data) CMD (/home/srv_data/sync.sh)
Apr 11 14:55:01 Ora1 CROND[22584]: (srv_data) CMD (/usr/bin/touch /DATA/z_test_$(date '+)
Apr 11 14:55:01 Ora1 CROND[22570]: (srv_data) CMDOUT (/bin/sh: -c: line 0: unexpected EOF while looking for matching `'')
Apr 11 14:55:01 Ora1 CROND[22570]: (srv_data) CMDOUT (/bin/sh: -c: line 1: syntax error: unexpected end of file)
Apr 11 14:55:01 Ora1 CROND[22569]: (srv_data) CMDOUT (sending incremental file list)
Apr 11 14:55:01 Ora1 CROND[22569]: (srv_data) CMDOUT ()
Apr 11 14:55:01 Ora1 CROND[22569]: (srv_data) CMDOUT (sent 602 bytes received 12 bytes 1,228.00 bytes/sec)
Apr 11 14:55:01 Ora1 CROND[22569]: (srv_data) CMDOUT (total size is 4,970 speedup is 8.09)
Apr 11 14:56:01 Ora1 CROND[22611]: (srv_data) CMD (/home/srv_data/sync.sh)
Apr 11 14:56:01 Ora1 CROND[22612]: (srv_data) CMD (/usr/bin/touch /DATA/z_test_$(date '+)
Apr 11 14:56:01 Ora1 CROND[22597]: (srv_data) CMDOUT (/bin/sh: -c: line 0: unexpected EOF while looking for matching `'')
Apr 11 14:56:01 Ora1 CROND[22597]: (srv_data) CMDOUT (/bin/sh: -c: line 1: syntax error: unexpected end of file)
Apr 11 14:56:02 Ora1 CROND[22596]: (srv_data) CMDOUT (sending incremental file list)
Apr 11 14:56:02 Ora1 CROND[22596]: (srv_data) CMDOUT ()
Apr 11 14:56:02 Ora1 CROND[22596]: (srv_data) CMDOUT (sent 602 bytes received 12 bytes 409.33 bytes/sec)
Apr 11 14:56:02 Ora1 CROND[22596]: (srv_data) CMDOUT (total size is 4,970 speedup is 8.09)
Apr 11 14:57:01 Ora1 CROND[22641]: (srv_data) CMD (/home/srv_data/sync.sh)
Apr 11 14:57:01 Ora1 CROND[22639]: (srv_data) CMD (/usr/bin/touch /DATA/z_test_$(date '+)
Apr 11 14:57:01 Ora1 CROND[22625]: (srv_data) CMDOUT (/bin/sh: -c: line 0: unexpected EOF while looking for matching `'')
Apr 11 14:57:01 Ora1 CROND[22625]: (srv_data) CMDOUT (/bin/sh: -c: line 1: syntax error: unexpected end of file)
Apr 11 14:57:01 Ora1 CROND[22624]: (srv_data) CMDOUT (sending incremental file list)
Apr 11 14:57:01 Ora1 CROND[22624]: (srv_data) CMDOUT ()
Apr 11 14:57:01 Ora1 CROND[22624]: (srv_data) CMDOUT (sent 602 bytes received 12 bytes 1,228.00 bytes/sec)
Apr 11 14:57:01 Ora1 CROND[22624]: (srv_data) CMDOUT (total size is 4,970 speedup is 8.09)
Apr 11 14:58:01 Ora1 CROND[22670]: (srv_data) CMD (/usr/bin/touch /DATA/z_test_$(date '+)
Apr 11 14:58:01 Ora1 CROND[22669]: (srv_data) CMD (/home/srv_data/sync.sh)
Apr 11 14:58:01 Ora1 CROND[22655]: (srv_data) CMDOUT (/bin/sh: -c: line 0: unexpected EOF while looking for matching `'')
Apr 11 14:58:01 Ora1 CROND[22655]: (srv_data) CMDOUT (/bin/sh: -c: line 1: syntax error: unexpected end of file)
Apr 11 14:58:02 Ora1 CROND[22654]: (srv_data) CMDOUT (sending incremental file list)
Apr 11 14:58:02 Ora1 CROND[22654]: (srv_data) CMDOUT ()
Apr 11 14:58:02 Ora1 CROND[22654]: (srv_data) CMDOUT (sent 602 bytes received 12 bytes 409.33 bytes/sec)
Apr 11 14:58:02 Ora1 CROND[22654]: (srv_data) CMDOUT (total size is 4,970 speedup is 8.09)
Apr 11 14:59:01 Ora1 CROND[22698]: (srv_data) CMD (/home/srv_data/sync.sh)
Apr 11 14:59:01 Ora1 CROND[22699]: (srv_data) CMD (/usr/bin/touch /DATA/z_test_$(date '+)
Apr 11 14:59:01 Ora1 CROND[22683]: (srv_data) CMDOUT (/bin/sh: -c: line 0: unexpected EOF while looking for matching `'')
Apr 11 14:59:01 Ora1 CROND[22683]: (srv_data) CMDOUT (/bin/sh: -c: line 1: syntax error: unexpected end of file)
Apr 11 14:59:01 Ora1 CROND[22682]: (srv_data) CMDOUT (sending incremental file list)
Apr 11 14:59:01 Ora1 CROND[22682]: (srv_data) CMDOUT ()
Apr 11 14:59:01 Ora1 CROND[22682]: (srv_data) CMDOUT (sent 602 bytes received 12 bytes 1,228.00 bytes/sec)
Apr 11 14:59:01 Ora1 CROND[22682]: (srv_data) CMDOUT (total size is 4,970 speedup is 8.09)
但我无法读取这个 cron 文件日志。我一点都没懂。该文件的第 5 列中的CMDand是什么？CMDOUT
什么/bin/sh: -c:意思？？