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#!/bin/bash
_die() {
echo "$1"
exit 2;
}
_exit() {
echo "$1"
exit 0;
}
SFILE=/etc/default/docker
DFILE=/tmp/docker
grep 'mtu=1400' $SFILE 1>/dev/null || _die "Could not open $SFILE"
[ $? -eq 0 ] && _exit "DOCKER_OPTS already updated"
[ ! -f ${SFILE}.ori ] && sudo -uroot cp -p ${SFILE} ${SFILE}.ori
cp -p $SFILE $DFILE
sed --in-place -e 's/DOCKER_OPTS="--debug/DOCKER_OPTS="--mtu=1400 --debug/' ${DFILE}
grep 'mtu=1400' $DFILE 1>/dev/null || _die "Could not adjust DOCKER_OPTS"
[ -s $DFILE ] && sudo -uroot cp -p $DFILE $SFILE
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