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Full Discussion: Hostsfile generator
Top Forums Shell Programming and Scripting Hostsfile generator Post 303040870 by Marti95 on Friday 8th of November 2019 04:43:30 AM
Old 11-08-2019
Hostsfile generator

Hello

I use a bash script to creating the hosts file /etc/hosts
Quote:
#!/bin/bash
System is Centos7
But there is a bug inside my output and I want to fix this.

My Array looks like this:
Code:
205,IP         111.122.133.20 
205,HOST2      unas           
205,HOST1      unas15533      
205,COMMENT    # UNAS         
775,IP         111.122.133.77 
775,HOST2      wlan           
775,HOST1      15533-wlan     
775,COMMENT    # WLAN Access Point
1015,IP        111.122.133.101
1015,HOST2     rdp1           
1015,HOST1     15533-rdp1     
1015,COMMENT   # RDP-Terminal 1
1025,IP        111.122.133.102
1025,HOST2     rdp2           
1025,HOST1     15533-rdp2     
 1025,COMMENT   # RDP-Terminal 2

The created hosts file looks something like this:
Quote:
# x.x.x.001 - x.x.x.020 ----- Gateway, Switch, Picco und Sicherung
192.168.123.1 123wan wan # Opensystem Gateway
192.168.123.2 123switch1 switch1 # Switch 1
192.168.123.3 123switch2 switch2 # Switch 2
192.168.123.5 123imm1 imm1 # IMM 1
192.168.123.20 unas123 unas # UNAS Sicherung

# x.x.x.41 - x.x.x.50 Server
192.168.123.41 123virtsrv1 virtsrv1 # CentOS

# x.x.x.161 - x.x.x.190 ----- Netzwerkdrucker
192.168.123.161 123mps1 mps1 # Netzwerkdrucker 1
192.168.123.162 123mps2 mps2 # Netzwerkdrucker 2
192.168.123.163 123mps3 mps3 # Netzwerkdrucker 3
192.168.123.164 123mps4 mps4 # Netzwerkdrucker 4

# #x.x.x.191 - x.x.x.199 ----- WPS Drucker und PreisChecker
192.168.123.191 123toschiba1 toschiba1 # Toshiba WPS 1
192.168.123.192 123toschiba2 toschiba2 # Toshiba WPS 2

# 10.168.123.xxx ----- DMZ
10.168.123.2 123rowa rowa # Rowa (DMZ)
I creat the hosts file with this command:
Code:
echo "===================================================="
d=`date +%Y%m%d`
touch "/tmp/hosts.${d}"
IFS=$'\n'
echo "${!ENTRIES[*]}" | sort -t, -k1,1n -k2,2.2r -k2.3 | while read IX; do printf "%-10s\n" ${ENTRIES[$IX]}; done | paste -sd"\t\t\t\n" >> "/tmp/hosts.${d}"
echo "Script finished"
echo "===================================================="

I would like to format the file so that the distances are even (sometimes there is a bigger gap between IP and hosts1, between hosts 1 and hosts 2, ...).
Also, I do not want to use tabs because this causes problems.

Thank you for the help Smilie
 

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PRIPS(1)						    BSD General Commands Manual 						  PRIPS(1)

NAME
prips -- print the IP addresses in a given range SYNOPSIS
prips [-c] [-d delim] [-e exclude] [-f format] [-i incr] start end prips [-c] [-d delim] [-e exclude] [-f format] [-i incr] CIDR-block prips -h DESCRIPTION
The prips tool can be used to print all of the IP addresses in a given range. It can enhance tools that only work on one host at a time, e.g. whois(1). The prips tool accepts the following command-line options: -c Print the range in CIDR notation. -d delim Set the delimiter to the character with ASCII code delim where 0 <= delim <= 255. -e <x.x.x,x.x> Exclude ranges from the output. -f format Set the format of addresses (hex, dec, or dot). -h Show summary of options. -i incr Set the increment to 'x'. ENVIRONMENT
The prips tool's operation is not influenced by any environment variables. FILES
The prips tool's operation is not influenced by any files. EXAMPLES
Display all the addresses in a reserved subnet: prips 192.168.32.0 192.168.32.255 The same, using CIDR notation: prips 192.168.32/24 Display only the usable addresses in a class A reserved subnet using a space instead of a newline for a delimiter: prips -d 32 10.0.0.1 10.255.255.255 Display every fourth address in a weird block: prips -i 4 192.168.32.7 192.168.33.5 Determine the smallest CIDR block containing two addresses: prips -c 192.168.32.5 192.168.32.11 DIAGNOSTICS
The prips utility exits 0 on success, and >0 if an error occurs. SEE ALSO
ipsc(1), gipsc(1) STANDARDS
No standards were harmed in the writing of the prips tool. HISTORY
The prips tool was originally written by Daniel Kelly and later adopted by Peter Pentchev. This manual page was originally written by Juan Alvarez for the Debian GNU/Linux system and later added to the prips distribution and converted to mdoc format by Peter Pentchev. AUTHORS
Daniel Kelly <dan@vertekcorp.com> Juan Alvarez <jalvarez@fluidsignal.com> Peter Pentchev <roam@ringlet.net> BUGS
Please report any bugs in the prips tool to its current maintainer, Peter Pentchev. BSD
March 1, 2011 BSD
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