Make kickstart safer

scripts/kickstart.sh

@@ -4,6 +4,34 @@
 #
 # bash <(curl -Ss raw.githubusercontent.com/01-edu/public/master/scripts/kickstart.sh)
 
+# 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
+
 gsettings set org.gnome.desktop.session idle-delay 0
 gsettings set org.gnome.desktop.screensaver lock-enabled false
 wget github.com/01-edu/public/archive/master.zip