Full Discussion: Hostsfile generator
Top Forums Shell Programming and Scripting Hostsfile generator Post 303040881 by RudiC on Friday 8th of November 2019 06:12:10 AM
man hosts:
Fields of the entry are separated by any number of blanks and/or tab characters.

Guessing ENTRIES is your array, how far would this get you:
for IN in $(sort -u <<< $(echo "${!ENTRIES[*]}" | tr ',' '\n'))
  do    [ ! "${IN/[A-Z]}" = "$IN" ] && break
        printf "%s %s %s %s\n" "${ENTRIES[$IN",IP"]}" "${ENTRIES[$IN",HOST1"]}" "${ENTRIES[$IN",HOST2"]}" "${ENTRIES[$IN",COMMENT"]}"
  done; 15533-rdp1 rdp1 15533-rdp2 rdp2 # RDP-Terminal 2 unas15533 unas # UNAS 15533-wlan wlan # WLAN Access Point

Test Your Knowledge in Computers #743
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SYSTEMD-RC-LOCAL-GENERATOR(8)				    systemd-rc-local-generator				     SYSTEMD-RC-LOCAL-GENERATOR(8)

systemd-rc-local-generator - Compatibility generator for starting /etc/rc.local and /usr/sbin/halt.local during boot and shutdown SYNOPSIS
/lib/systemd/system-generators/systemd-rc-local-generator DESCRIPTION
systemd-rc-local-generator is a generator that checks whether /etc/rc.local exists and is executable, and if it is pulls the rc-local.service unit into the boot process. This unit is responsible for running this script during late boot. Note that the script will be run with slightly different semantics than the original System V version, which was run "last" in the boot process, which is a concept that does not translate to systemd. The script is run after network.target, but in parallel with most other regular system services. systemd-rc-local-generator also checks whether /usr/sbin/halt.local exists and is executable, and if it is pulls the halt-local.service unit into the shutdown process. This unit is responsible for running this script during later shutdown. Support for both /etc/rc.local and /usr/sbin/halt.local is provided for compatibility with specific System V systems only. However, it is strongly recommended to avoid making use of these scripts today, and instead provide proper unit files with appropriate dependencies for any scripts to run during the boot or shutdown processes. systemd-rc-local-generator implements systemd.generator(7). SEE ALSO
systemd(1), systemctl(1) systemd 237 SYSTEMD-RC-LOCAL-GENERATOR(8)

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