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Full Discussion: DHCP server cannot execute script: permission denied exit 32512
Top Forums UNIX for Beginners Questions & Answers DHCP server cannot execute script: permission denied exit 32512 Post 303045694 by Michelon on Thursday 9th of April 2020 05:20:24 AM
Old 04-09-2020
DHCP server cannot execute script: permission denied exit 32512
I created a DHCP server on ubuntu 18:04 using isc-dhcp-server that normally works. I want to run a script located in /user/sbin but get error of permission denied with exit status 32512. Probably it's a permission error but I'm not expert. This is my dhcp server located in:

/etc/dhcp/dhcpd.conf

Code:
default-lease-time 86400;
max-lease-time 7200;

ignore client-updates;
authoritative;

use-host-decl-names on;
log-facility local7;


subnet 192.168.1.0 netmask 255.255.255.0 {
    range 192.168.1.101 192.168.1.150;
    option subnet-mask 255.255.255.0;
    option routers 192.168.1.3;
    option domain-name-servers 192.168.1.100;
    ddns-rev-domainname "in-addr.arpa.";
}

on commit {
    set ClientIP = binary-to-ascii(10, 8, ".", leased-address);
    set ClientMac = binary-to-ascii(16, 8, ":", substring(hardware, 1, 6));
    log(concat("Commit: IP: ", ClientIP, " Mac: ", ClientMac));
    execute("/usr/sbin/update_DB.sh", "commit", ClientIP, ClientMac);
}

/var/log/syslog

Code:
Apr  8 14:28:05 dhcp dhcpd[1223]: Commit: IP: 192.168.1.102 Mac: XXX
Apr  8 14:28:05 dhcp dhcpd[1223]: execute_statement argv[0] = /usr/sbin/update_DB.sh
Apr  8 14:28:05 dhcp dhcpd[1223]: execute_statement argv[1] = commit
Apr  8 14:28:05 dhcp dhcpd[1223]: execute_statement argv[2] = 192.168.1.102
Apr  8 14:28:05 dhcp dhcpd[1223]: execute_statement argv[3] = XXX
Apr  8 14:28:05 dhcp dhcpd[1227]: Unable to execute /usr/sbin/update_DB.sh: Permission denied
Apr  8 14:28:05 dhcp dhcpd[1223]: execute: /usr/sbin/update_DB.sh exit status 32512

anyone knows how to solve it, please? Thanks!
 

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LEARN ABOUT DEBIAN

pbuilder-uml.conf

pbuilder-uml.conf(5)						     pbuilder						      pbuilder-uml.conf(5)

NAME

       pbuilder-uml.conf - configuration file for user-mode-linux port of pbuilder

DESCRIPTION

       /etc/pbuilder/pbuilder-uml.conf contains default values used in pbuilder-user-mode-linux program invocation.

FORMAT

       MY_ETH0=tuntap,,,192.168.0.2
	      Configures ethernet setting used for booting linux.  See how rootstrap boots your system, and copy that.

	      Specify --eth0=slirp,12345,/usr/bin/slirp-fullbolt to use the slirp connection.

       UML_IP=192.168.0.3
	      IP address to use for guest OS.

	      This can be set to dhcp for obtaining IP address through DHCP.

       UML_NETMASK=255.255.255.0
	      Guest OS netmask

       UML_NETWORK=192.168.0.0
	      Guest OS network

       UML_BROADCAST=255.255.255.255
	      Guest OS broadcast

       UML_GATEWAY=192.168.0.1
	      Guest OS gateway

       PBUILDER_UML_IMAGE=${HOME}/uml-image
	      Guest OS file system image.

       UML_MOUNT_TMPFS=no
	      Whether to mount tmpfs inside the guest image.  This is probably mostly useless.

       BUILDPLACE=${HOME}/tmp/
	      The  location  which build will take place.  pbuilder-user-mode-linux will place temporary COW files to there.  The user running UML
	      needs to be able to access that directory.

       UML_MEM=128
	      The amount of memory allowed for UML.  Give more value to here.

       UML_HOSTNAME=uml-host
	      The hostname for the UML.

	      The hostname should be available in /etc/hosts so that hostname -f will be able to return the FQDN.

       UML_BUILDRESULT=/directory/of/build/result
	      The directory where build result of pbuilder-user-mode-linux is stored.

       ROOTSTRAP_IMAGESIZE=size-in-megabytes
	      The size, in MB, of the disk iamge to create. Defaults to 1000.

NOTES

       It is advised to set APTCACHEHARDLINK to no in ~/.pbuilderrc.  see pbuilderrc(5) for details.

AUTHOR

       Initial coding, and main maintenance is done by Junichi Uekawa <dancer@debian.org>.

       The homepage is available at http://pbuilder.alioth.debian.org

FILES

       /etc/pbuilder/pbuilder-uml.conf, ${HOME}/.pbuilderrc

SEE ALSO

       /usr/share/doc/pbuilder/pbuilder-doc.html, pbuilder-user-mode-linux(1), pbuilder(8), pbuilderrc(5), pdebuild(1)

Debian								    2003 Jan 8						      pbuilder-uml.conf(5)
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