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#!/bin/bash
# Set scripting variables
# Treat unset variables as an error when substituting.
set -u
# Exit immediately if a command exits with a non-zero status.
set -e
# Set the variable corresponding to the return value of a pipeline is the status
# of the last command to exit with a non-zero status, or zero if no command
# exited with a non-zero status
set -o pipefail
# Separate tokens on newlines only
IFS='
'
# The value of this parameter is expanded like PS1 and the expanded value is the
# prompt printed before the command line is echoed when the -x option is set
# (see The Set Builtin). The first character of the expanded value is replicated
# multiple times, as necessary, to indicate multiple levels of indirection.
# \D{%F %T} prints date like this : 2019-12-31 23:59:59
PS4='-\D{%F %T} '
# Print commands and their arguments as they are executed.
set -x
# Skip dialogs during apt-get install commands
export DEBIAN_FRONTEND=noninteractive # DEBIAN_PRIORITY=critical
export LC_ALL=C LANG=C
export SHELL=/bin/bash