#Linux date now minus minutes apk
#Linux date now minus minutes verification

r,-reference FILE Display last modification time of FILE 'hours', 'minutes', or 'seconds' for date and R,-rfc-2822 Output RFC-2822 compliant date string u,-utc Work in UTC (don't convert to local time) Try to get help messages from both of them. I suppose the date you can run in that container is not GNU coreutils date which is commonly available on Linux hosts, but one of the Busybox applets. Note that if you want to report UTC (Zulu) time, you should use TZ=UTC0 date or date -u as otherwise, you'd get the time in the system's/user's timezone. That syntax should also work with GNU date.

Which will give you the date 86400 seconds ago, without the ambiguity of GNU date's yesterday (is it 86400 ago, or is it yesterday at the same time of the day? What if there was no such time of the day yesterday because the clock changed for DST?). It's OK though as busybox date, like GNU date supports the date specification, so you can do: date -d +%s) - 86400))' In the musl C library which alpine Linux uses however, strftime() does support %s but strptime() doesn't. Where busybox is built against a C library implementation whose strptime() and strftime() support the non-standard %s flag, you could do: date -D %s -d '$(($(date +%s) - 86400))' REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZEĪlpine-coreutils latest a7d9116a00ee 2 minutes ago 11.47 MBĪlpine 3.2 8697b6cc1f48 2 days ago 5.242 MBĭebian latest df2a0347c9d0 11 days ago 125.2 MBīusybox date supports a -D option which (like zsh's strftime but contrary to GNU date) gives you an interface to strptime() where you can parse dates (though not relative dates) in any format (ast-open date and ksh93's printf also have ways to customize the input format). The image size will double but is till 11.47 MB, more than an order of siZe less, compared to Debian standard : $ docker images Removing intermediate container 694fa5cb271c

#Linux date now minus minutes apk

Step 1 : RUN apk add -update coreutils & rm -rf /var/cache/apk/* $ docker build -t alpine-coreutils - 8697b6cc1f48 RUN apk add -update coreutils & rm -rf /var/cache/apk/* To work with -d options you just need to add coreutils package: $ cat Dockerfile.alpine-coreutils While the rest of the options seem running ok: / # dateīusyBox/Alpine version of date doesn't support -d options, even if the help is exatly the same in the Ubuntu version as well as in others more fat distros.Īlso the 'containerization' doesn't miss anything here. Removing intermediate container 888571296e79Īnyway when I run date -d it fails: $ docker run -i -t collector sh (5/11) Installing ncurses-terminfo-base (5.9-r3) Step 1 : RUN apk add -update jq curl & rm -rf /var/cache/apk/* Status: Downloaded newer image for alpine:3.2

#Linux date now minus minutes verification

Important: image verification is a tech preview feature and should not be relied on to provide security.ĭigest: sha256:eb84cc74347e4d7c484d566dec8a5eef82bab1b78308b92cda559bcff29c27cc

Sending build context to Docker daemon 2.048 kBĪlpine:3.2: The image you are pulling has been verified. The build run successfully: $ docker build -t collector. RUN apk add -update jq curl & rm -rf /var/cache/apk/* I built Alpine Linux in a Docker container with the following Dockerfile: FROM alpine:3.2