My Unix config files and shell scripts, optimized for Fedora, Debian, macOS and Windows (in that order).
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#!/usr/bin/perl
# docker-enter: Get inside a docker container, using nsenter.
#
# Usage: docker-enter <container-id>
#
# See also:
# https://jpetazzo.github.io/2014/03/23/lxc-attach-nsinit-nsenter-docker-0-9/
#
# --Kirsle
# http://sh.kirsle.net/
use strict;
use warnings;
if (scalar(@ARGV) != 1) {
die "Usage: $0 <container-id>\n";
}
my $container_id = shift(@ARGV);
# Get the process ID.
chomp(my $pid = `docker inspect --format '{{.State.Pid}}' $container_id`);
die "Couldn't get process ID for that container!\n" unless $pid;
# Enter the docker container.
exec("nsenter --target $pid --mount --uts --ipc --net --pid");