awkを使ってvmstatに日時をつける

awkを使えばvmstatだけではなくなんにでも日時をつけることが出来ます。

vmstatに日時をつける

vmstat 1|awk '{print strftime("%Y/%m/%d %H:%M:%S",systime()) " " $0 }'

2019/06/13 09:27:35 procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu-----
2019/06/13 09:27:35  r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa st
2019/06/13 09:27:35  2  0      0 265972  12900 233000    0    0   274   163  511  423 15  2 83  0  0    
2019/06/13 09:27:36  0  0      0 296276  12900 233116    0    0     0  5072  593 2685 31  3 66  0  0    
2019/06/13 09:27:37  0  0      0 296160  12900 233296    0    0     0     0  397  300 14  0 86  0  0    
2019/06/13 09:27:38  0  0      0 296160  12908 233484    0    0     0    28  428  329 14  0 85  0  1    
2019/06/13 09:27:39  0  0      0 296036  12908 233704    0    0     0     0  488  393 14  1 85  0  0    
2019/06/13 09:27:40  0  0      0 295788  12908 233932    0    0     0     0  465  343 14  0 86  0  0    
2019/06/13 09:27:41  1  0      0 295540  12908 234148    0    0     0     0  424  311 13  2 85  0  0    
2019/06/13 09:27:42  0  0      0 295292  12908 234348    0    0     0     0  431  310 14  1 85  0  0    
2019/06/13 09:27:43  0  0      0 295168  12916 234492    0    0     0    12  431  325 13  1 86  0  0    

tail -f したデータに日時をつける

tail -f access_log | awk '{print strftime("%Y/%m/%d %H:%M:%S",systime()) " " $0 }'

2019/06/13 09:31:14 1.2.3.4 - - [13/Jun/2019:09:09:08 +0000] "GET / HTTP/1.1" 200 479 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:56.0) Gecko/20100101 Firefox/56.0 Waterfox/56.2.10"
2019/06/13 09:31:14 1.2.3.4 - - [13/Jun/2019:09:09:08 +0000] "GET /css/demo.css HTTP/1.1" 304 - " "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:56.0) Gecko/20100101 Firefox/56.0 Waterfox/56.2.10"
2019/06/13 09:31:14 1.2.3.4 - - [13/Jun/2019:09:09:08 +0000] "GET /js/jquery.min.js HTTP/1.1" 304 - "" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:56.0) Gecko/20100101 Firefox/56.0 Waterfox/56.2.10"