#! /usr/bin/perl
# -----------------------------------------------------------------------------
# Copyright (c) 2006, 2007 - OpenSLX GmbH
#
# This program is free software distributed under the GPL version 2.
# See http://openslx.org/COPYING
#
# If you have any feedback please consult http://openslx.org/feedback and
# send your suggestions, praise, or complaints to feedback@openslx.org
#
# General information about OpenSLX can be found at http://openslx.org/
# -----------------------------------------------------------------------------
use strict;
my $abstract = q[
slxconfig
This script can be used to display or change the OpenSLX configuration
database. You can create systems that use a specific vendor-OS
and you can create clients for these systems, too.
];
use Getopt::Long qw(:config pass_through);
use Pod::Usage;
# add the folder this script lives in and the lib-folder to perl's
# search path for modules:
use FindBin;
use lib "$FindBin::RealBin";
use lib "$FindBin::RealBin/../lib";
use lib "$FindBin::RealBin/../config-db";
# development path to config-db
use OpenSLX::Basics;
use OpenSLX::ConfigDB;
use OpenSLX::DBSchema;
my (
$helpReq,
$manReq,
$verbose,
$versionReq,
);
GetOptions(
'help|?' => \$helpReq,
'man' => \$manReq,
'verbose' => \$verbose,
'version' => \$versionReq,
) or pod2usage(2);
pod2usage(-msg => $abstract, -verbose => 0, -exitval => 1) if $helpReq;
if ($manReq) {
$ENV{LANG} = 'en_EN';
# avoid dubious problem with perldoc in combination with UTF-8 that
# leads to strange dashes and single-quotes being used
pod2usage(-verbose => 2)
}
if ($versionReq) {
system('slxversion');
exit 1;
}
openslxInit();
my $openslxDB = OpenSLX::ConfigDB->new();
$openslxDB->connect();
my $action = shift @ARGV;
if ($action =~ m[^add-system$]i) {
addSystemToConfigDB(@ARGV);
} elsif ($action =~ m[^add-client$]i) {
addClientToConfigDB(@ARGV);
} elsif ($action =~ m[^change-system$]i) {
changeSystemInConfigDB(@ARGV);
} elsif ($action =~ m[^change-client$]i) {
changeClientInConfigDB(@ARGV);
} elsif ($action =~ m[^list-c]) {
print _tr("List of the matching clients:\n");
listClients(@ARGV);
} elsif ($action =~ m[^list-e]) {
print _tr("List of the matching exports:\n");
listExports(@ARGV);
} elsif ($action =~ m[^list-s]) {
print _tr("List of the matching systems:\n");
listSystems(@ARGV);
} elsif ($action =~ m[^list-v]) {
print _tr("List of the matching vendor-OSes:\n");
listVendorOSes(@ARGV);
} elsif ($action =~ m[^remove-client$]i) {
removeClientFromConfigDB(@ARGV);
} elsif ($action =~ m[^remove-system$]i) {
removeSystemFromConfigDB(@ARGV);
} else {
print STDERR _tr("You need to specify exactly one of these actions:
add-client
add-system
change-client
change-system
list-client
list-export
list-system
list-vendoros
remove-client
remove-system
Try '%s --help' for more info.\n", $0);
}
$openslxDB->disconnect();
exit;
sub parseKeyValueArgs
{
my $allowedKeys = shift;
my $table = shift;
my %dataHash;
while (my $param = shift) {
if ($param !~ m[^\s*([\w\-]+)\s*=(.+)$]) {
die _tr("value specification %s has unknown format, expected <key>=<value>\n",
$param);
}
my $key = $1;
my $value = $2;
if (!grep { $_ eq $key } @$allowedKeys) {
die _tr("unknown attribute '%s' specified for %s\n", $key, $table);
}
$dataHash{$1} = $2;
}
return \%dataHash;
}
sub dumpElements
{
my $objName = shift;
my $nameClause = shift || sub { "\t$_->{name}\n" };
if ($verbose) {
foreach my $elem (@_) {
print "$objName '$elem->{name}':\n";
print join(
'',
map {
my $spc = ' 'x25;
my $val = $elem->{$_};
$val =~ s[\n][\n\t$spc ]g;
"\t$_"
.substr($spc, length($_))
." = $val\n";
}
sort keys %$elem
);
}
} else {
print join('', sort map &$nameClause, @_);
}
}
sub listClients
{
my @clientKeys
= map { (/^(\w+)\W/) ? $1 : $_; }
@{$DbSchema->{tables}->{client}};
my $clientData = parseKeyValueArgs(\@clientKeys, 'client', @_);
dumpElements(
'client', undef,
map {
my @sysIDs = $openslxDB->aggregatedSystemIDsOfClient($_);
$_->{systems}
= join "\n",
map { $_->{name} }
sort { $a->{name} cmp $b->{name} }
$openslxDB->fetchSystemByID(\@sysIDs, 'name');
$_;
}
sort { $a->{name} cmp $b->{name} }
$openslxDB->fetchClientByFilter($clientData)
);
}
sub listExports
{
my @exportKeys
= map { (/^(\w+)\W/) ? $1 : $_; }
@{$DbSchema->{tables}->{export}};
my $exportData = parseKeyValueArgs(\@exportKeys, 'export', @_);
dumpElements(
'export',
sub {
"\t$_->{name}".substr(' ' x 30, length($_->{name}))."($_->{type})\n"
},
map {
my $vendorOS
= $openslxDB->fetchVendorOSByID($_->{vendor_os_id}, 'name');
if (defined $vendorOS) {
$_->{vendor_os_id} .= " ($vendorOS->{name})";
}
$_;
}
sort { $a->{name} eq $b->{name} || $a->{type} cmp $b->{type} }
$openslxDB->fetchExportByFilter($exportData)
);
}
sub listSystems
{
my @systemKeys
= map { (/^(\w+)\W/) ? $1 : $_; }
@{$DbSchema->{tables}->{system}};
my $systemData = parseKeyValueArgs(\@systemKeys, 'system', @_);
dumpElements(
'system', undef,
map {
my @clientIDs = $openslxDB->aggregatedClientIDsOfSystem($_);
$_->{clients}
= join "\n",
map { $_->{name} }
sort { $a->{name} cmp $b->{name} }
$openslxDB->fetchClientByID(\@clientIDs, 'name');
my $export = $openslxDB->fetchExportByID($_->{export_id}, 'name');
if (defined $export) {
$_->{export_id} .= " ($export->{name})";
}
$_;
}
sort { $a->{name} cmp $b->{name} }
$openslxDB->fetchSystemByFilter($systemData)
);
}
sub listVendorOSes
{
my @vendorOSKeys
= map { (/^(\w+)\W/) ? $1 : $_; }
@{$DbSchema->{tables}->{vendor_os}};
my $vendorOSData = parseKeyValueArgs(\@vendorOSKeys, 'vendor_os', @_);
dumpElements('vendor-OS', undef,
sort { $a->{name} cmp $b->{name} }
$openslxDB->fetchVendorOSByFilter($vendorOSData));
}
sub addClientToConfigDB
{
my @clientKeys
= map { (/^(\w+)\W/) ? $1 : $_; }
@{$DbSchema->{tables}->{client}};
push @clientKeys, 'systems';
my $clientData = parseKeyValueArgs(\@clientKeys, 'client', @_);
my @systemIDs;
if (exists $clientData->{systems}) {
@systemIDs
= map {
my $system
= $openslxDB->fetchSystemByFilter({ 'name' => $_ });
if (!defined $system) {
die _tr("system '%s' doesn't exist!\n", $_);
}
$system->{id};
}
split '\s*,\s*', $clientData->{systems};
delete $clientData->{systems};
}
if (!length($clientData->{name})) {
die _tr("you have to specify the name for the new client\n");
}
if (!length($clientData->{mac})) {
die _tr("you have to specify the MAC for the new client\n");
}
if ($clientData->{mac} !~ m[^(?:[[:xdigit:]][[:xdigit:]]:){5}?[[:xdigit:]][[:xdigit:]]$]) {
die _tr("unknown MAC-format given, expected something like '01:02:03:04:05:06'!\n");
}
if ($openslxDB->fetchClientByFilter({ 'name' => $clientData->{name} })) {
die _tr("the client '%s' already exists in the DB, giving up!\n",
$clientData->{name});
}
my $clientID = $openslxDB->addClient([$clientData]);
vlog 0, _tr("client '%s' has been successfully added to DB (ID=%s)\n",
$clientData->{name}, $clientID);
if (defined @systemIDs) {
$openslxDB->addSystemIDsToClient($clientID, \@systemIDs);
}
if ($verbose) {
listClients("id=$clientID");
}
}
sub addSystemToConfigDB
{
my @systemKeys
= map { (/^(\w+)\W/) ? $1 : $_; }
@{$DbSchema->{tables}->{system}};
push @systemKeys, 'clients', 'export';
my $systemData = parseKeyValueArgs(\@systemKeys, 'system', @_);
if (!length($systemData->{name})) {
die _tr("you have to specify the name of the new system!\n");
}
if (!length($systemData->{export})) {
$systemData->{export} = $systemData->{name};
# try falling back to given system name
}
my $exportName = $systemData->{export};
delete $systemData->{export};
my $export
= $openslxDB->fetchExportByFilter({ 'name' => $exportName });
if (!defined $export) {
die _tr("export '%s' could not be found in DB, giving up!\n", $exportName);
}
$systemData->{export_id} = $export->{id};
my @clientIDs;
if (exists $systemData->{clients}) {
@clientIDs
= map {
my $client
= $openslxDB->fetchClientByFilter({ 'name' => $_ });
if (!defined $client) {
die _tr("client '%s' doesn't exist in DB, giving up!\n", $_);
}
$client->{id};
}
split '\s*,\s*', $systemData->{clients};
delete $systemData->{clients};
}
if ($openslxDB->fetchSystemByFilter({ 'name' => $systemData->{name} })) {
die _tr("the system '%s' already exists in the DB, giving up!\n",
$systemData->{name});
}
my $systemID = $openslxDB->addSystem([$systemData]);
vlog 0, _tr("system '%s' has been successfully added to DB (ID=%s)\n",
$systemData->{name}, $systemID);
if (defined @clientIDs) {
$openslxDB->addClientIDsToSystem($systemID, \@clientIDs);
}
if ($verbose) {
listSystems("id=$systemID");
}
}
sub changeClientInConfigDB
{
my @clientKeys
= map { (/^(\w+)\W/) ? $1 : $_; }
@{$DbSchema->{tables}->{client}};
push @clientKeys, 'systems', 'add-systems', 'remove-systems';
my $clientData = parseKeyValueArgs(\@clientKeys, 'client', @_);
if (!exists $clientData->{name}) {
die _tr("you have to specify the name for the client you'd like to change!\n");
}
my $client = $openslxDB->fetchClientByFilter({'name' => $clientData->{name}});
if (!defined $client) {
die _tr("the client '%s' doesn't exists in the DB, giving up!\n",
$clientData->{name});
}
my @systemIDs;
if (exists $clientData->{systems}) {
@systemIDs
= map {
my $system
= $openslxDB->fetchSystemByFilter({ 'name' => $_ });
if (!defined $system) {
die _tr("system '%s' doesn't exist!\n", $_);
}
$system->{id};
}
split ",", $clientData->{systems};
delete $clientData->{systems};
}
if (exists $clientData->{'add-systems'}) {
@systemIDs = $openslxDB->fetchSystemIDsOfClient($client->{id});
push @systemIDs,
map {
my $system
= $openslxDB->fetchSystemByFilter({ 'name' => $_ });
if (!defined $system) {
die _tr("system '%s' doesn't exist!\n", $_);
}
$system->{id};
}
split ",", $clientData->{'add-systems'};
delete $clientData->{'add-systems'};
}
if (exists $clientData->{'remove-systems'}) {
@systemIDs = $openslxDB->fetchSystemIDsOfClient($client->{id});
foreach my $sysName (split ",", $clientData->{'remove-systems'}) {
my $system
= $openslxDB->fetchSystemByFilter({ 'name' => $sysName });
if (!defined $system) {
die _tr("system '%s' doesn't exist!\n", $sysName);
}
@systemIDs = grep { $_ != $system->{id} } @systemIDs;
}
delete $clientData->{'remove-systems'};
}
if (length($clientData->{mac})
&& $clientData->{mac} !~ m[^(?:[[:xdigit:]][[:xdigit:]]:){5}?[[:xdigit:]][[:xdigit:]]$]) {
die _tr("unknown MAC-format given, expected something like '01:02:03:04:05:06'!\n");
}
$openslxDB->changeClient($client->{id}, [$clientData]);
vlog 0, _tr("client '%s' has been successfully changed\n",
$clientData->{name});
if (defined @systemIDs) {
$openslxDB->setSystemIDsOfClient($client->{id}, \@systemIDs);
}
if ($verbose) {
listClients("id=$client->{id}");
}
}
sub changeSystemInConfigDB
{
my @systemKeys
= map { (/^(\w+)\W/) ? $1 : $_; }
@{$DbSchema->{tables}->{system}};
push @systemKeys, 'clients', 'add-clients', 'remove-clients';
my $systemData = parseKeyValueArgs(\@systemKeys, 'system', @_);
if (!exists $systemData->{name}) {
die _tr("you have to specify the name of the system you'd like to change!\n");
}
my $system = $openslxDB->fetchSystemByFilter({'name' => $systemData->{name}});
if (!defined $system) {
die _tr("the system '%s' doesn't exists in the DB, giving up!\n",
$systemData->{name});
}
my @clientIDs;
if (exists $systemData->{clients}) {
@clientIDs
= map {
my $client
= $openslxDB->fetchClientByFilter({ 'name' => $_ });
if (!defined $client) {
die _tr("client '%s' doesn't exist in DB, giving up!\n", $_);
}
$client->{id};
}
split ",", $systemData->{clients};
delete $systemData->{clients};
}
if (exists $systemData->{'add-clients'}) {
@clientIDs = $openslxDB->fetchClientIDsOfSystem($system->{id});
push @clientIDs,
map {
my $client
= $openslxDB->fetchClientByFilter({ 'name' => $_ });
if (!defined $client) {
die _tr("client '%s' doesn't exist!\n", $_);
}
$client->{id};
}
split ",", $systemData->{'add-clients'};
delete $systemData->{'add-clients'};
}
if (exists $systemData->{'remove-clients'}) {
@clientIDs = $openslxDB->fetchClientIDsOfSystem($system->{id});
foreach my $clientName (split ",", $systemData->{'remove-clients'}) {
my $client
= $openslxDB->fetchClientByFilter({ 'name' => $clientName });
if (!defined $client) {
die _tr("client '%s' doesn't exist!\n", $clientName);
}
@clientIDs = grep { $_ != $client->{id} } @clientIDs;
}
delete $systemData->{'remove-clients'};
}
$openslxDB->changeSystem($system->{id}, [$systemData]);
vlog 0, _tr("system '%s' has been successfully changed\n",
$systemData->{name});
if (defined @clientIDs) {
$openslxDB->setClientIDsOfSystem($system->{id}, \@clientIDs);
}
if ($verbose) {
listSystems("id=$system->{id}");
}
}
sub removeClientFromConfigDB
{
my $clientData = parseKeyValueArgs(['name'], 'client', @_);
if (!length($clientData->{name})) {
die _tr("you have to specify the name of the client you'd like to remove!\n");
}
my $client = $openslxDB->fetchClientByFilter({'name' => $clientData->{name}});
if (!defined $client) {
die _tr("the client '%s' doesn't exists in the DB, giving up!\n",
$clientData->{name});
}
if ($client->{id} == 0) {
die _tr("you can't remove the default-client!\n");
}
$openslxDB->removeClient($client->{id});
vlog 0, _tr("client '%s' has been successfully removed from DB\n",
$clientData->{name});
}
sub removeSystemFromConfigDB
{
my $systemData = parseKeyValueArgs(['name'], 'system', @_);
if (!length($systemData->{name})) {
die _tr("you have to specify the name of the system you'd like to remove!\n");
}
my $system = $openslxDB->fetchSystemByFilter({'name' => $systemData->{name}});
if (!defined $system) {
die _tr("the system '%s' doesn't exists in the DB, giving up!\n",
$systemData->{name});
}
if ($system->{id} == 0) {
die _tr("you can't remove the default-client!\n");
}
$openslxDB->removeSystem($system->{id});
vlog 0, _tr("system '%s' has been successfully removed from DB\n",
$systemData->{name});
}
__END__
=head1 NAME
slxconfig - OpenSLX-script to configure a vendor-OS for use with
OpenSLX. You can create systems that will use the specified vendor-OS
and you can create clients for that system, too.
=head1 SYNOPSIS
slxconfig [options] <action> <key-value-pairs>
=head3 OpenSLX Options
--base-path=<string> basic path to project files
--bin-path=<string> path to binaries and scripts
--config-path=<string> path to configuration files
--db-basepath=<string> basic path to openslx database
--db-datadir=<string> data folder created under db-basepath
--db-name=<string> name of database
--db-spec=<string> full DBI-specification of database
--db-type=<string> type of database to connect to
--export-path=<string> path to root of all exported filesystems
--locale=<string> locale to use for translations
--logfile=<string> file to write logging output to
--private-path=<string> path to private data
--public-path=<string> path to public (client-accesible) data
--share-path=<string> path to sharable data
--stage1-path=<string> path to stage1 systems
--temp-path=<string> path to temporary data
--tftpboot-path=<string> path to root of tftp-server
--verbose-level=<int> level of logging verbosity (0-3)
=head3 General Options
--help brief help message
--man show full documentation
--verbose be more verbose
--version show version
=head3 Actions
=over 8
=item B<< add-client name=<client-name> mac=<MAC> [<key>=<value> ...] >>
adds a new client to the config-DB
=item B<< add-system name=<system-name> [export=<export-name>] \ >>
=item B<< <key>=<value> ...] >>
adds a new system to the config-DB
=item B<< change-client name=<client-name> [<key>=<value> ...] >>
changes the data of an existing system in the config-DB
=item B<< change-system name=<system-name> [<key>=<value> ...] >>
changes the data of an exiisting system in the config-DB
=item B<< list-clients [<key>=<value> ...] >>
lists all clients in config-DB (optionally matching given criteria)
=item B<< list-exports [<key>=<value> ...] >>
lists all exports in config-DB (optionally matching given criteria)
=item B<< list-systems [<key>=<value> ...] >>
lists all systems in config-DB (optionally matching given
criteria)
=item B<< list-vendoroses [<key>=<value> ...] >>
lists all vendor-OSes in config-DB (optionally matching given criteria)
=item B<< remove-client name=<client-name> >>
removes a client from the config-DB
=item B<< remove-system name=<system-name> >>
removes a system from the config-DB
=back
=head1 OPTIONS
=head3 OpenSLX Options
=over 8
=item B<< --base-path=<string> >>
Sets basic path to project files.
Default is $SLX_BASE_PATH (usually F</opt/openslx>).
=item B<< --bin-path=<string> >>
Sets path to binaries and scripts.
Default is $SLX_BASE_PATH/bin (usually F</opt/openslx/bin>).
=item B<< --config-path=<string> >>
Sets path to configuration files.
Default is $SLX_CONFIG_PATH (usually F</etc/opt/openslx>).
=item B<< --db-basepath=<string> >>
Sets basic path to openslx database.
Default is $SLX_DB_PATH (usually F</var/opt/openslx/db>).
=item B<< --db-datadir=<string> >>
Sets data folder created under db-basepath.
Default is $SLX_DB_DATADIR (usually empty as it depends on db-type
whether or not such a directory is required at all).
=item B<< --db-name=<string> >>
Gives the name of the database to connect to.
Default is $SLX_DB_NAME (usually C<openslx>).
=item B<< --db-spec=<string> >>
Gives the full DBI-specification of database to connect to. Content depends
on the db-type.
Default is $SLX_DB_SPEC (usually empty as it will be built automatically).
=item B<< --db-type=<string> >>
Sets the type of database to connect to (CSV, SQLite, mysql, ...).
Default $SLX_DB_TYPE (usually C<CSV>).
=item B<< --export-path=<string> >>
Sets path to root of all exported filesystems. For each type of export (NFS,
NBD, ...) a separate folder will be created in here.
Default is $SLX_EXPORT_PATH (usually F</srv/openslx/export>.
=item B<< --locale=<string> >>
Sets the locale to use for translations.
Defaults to the system's standard locale.
=item B<< --logfile=<string> >>
Specifies a file where logging output will be written to.
Default is to log to STDERR.
=item B<< --private-path=<string> >>
Sets path to private data, where the config-db, vendor_oses and configurational
extensions will be stored.
Default is $SLX_PRIVATE_PATH (usually F</var/opt/openslx>.
=item B<< --public-path=<string> >>
Sets path to public (client-accesible) data.
Default is $SLX_PUBLIC_PATH (usually F</srv/openslx>.
=item B<< --share-path=<string> >>
Sets path to sharable data, where distro-specs and functionality templates
will be stored.
Default is $SLX_SHARE_PATH (usually F</opt/openslx/share>.
=item B<< --stage1-path=<string> >>
Sets path to stage1 systems, where distributor-systems will be installed.
Default is $SLX_STAGE1_PATH (usually F</var/opt/openslx/stage1>.
=item B<< --temp-path=<string> >>
Sets path to temporary data.
Default is $SLX_TEMP_PATH (usually F</tmp>.
=item B<< --tftpboot-path=<string> >>
Sets path to root of tftp-server from which clients will access their files.
Default is $SLX_TFTPBOOT_PATH (usually F</srv/openslx/tftpboot>.
=item B<< --verbose-level=<int> >>
Sets the level of logging verbosity (0-3).
Default is $SLX_VERBOSE_LEVEL (usually 0, no logging).
=back
=head3 General Options
=over 8
=item B<< --help >>
Prints a brief help message and exits.
=item B<< --man >>
Prints the manual page and exits.
=item B<< --verbose >>
Prints more information during execution of any action.
=item B<< --version >>
Prints the version and exits.
=back
=head1 EXAMPLES
=head3 Listing existing Clients / Exports / Systems / Vendor-OSes
=over 8
=item B<< slxconfig list-client >>
=item B<< slxconfig list-export >>
=item B<< slxconfig list-system >>
=item B<< slxconfig list-vendoros >>
lists all existing instances of the respective DB-objects.
=item B<< slxconfig list-client id=3 >>
lists the client with id=3
=item B<< slxconfig list-export type=nfs >>
lists the exports of type 'nfs'
=back
=head3 Adding a new System to an exported Vendor-OS
=over 8
=item B<< slxconfig add-system name=debian-4.0 >>
adds a new system named 'debian-4.0' to the config-DB that will
use the export of the same name. No client will be associated
with this system, yet.
=item B<< slxconfig add-system name=suse-10.1 export-name=suse-10.1-kde \ >>
=item B<< clients=PC131,PC132,PC133 \ >>
=item B<< label="Linux Desktop" >>
adds a new system name 'suse-10.1' to the config-DB that will
use the export named 'suse-10.1-kde'. The system will be labeled
'Linux Desktop' and the clients 'PC131, 'PC132' and 'PC133' are
associated with this system (so they can boot it).
=back
=head3 Adding a new Client
=over 8
=item B<< slxconfig add-client name=vmware-1 mac=01:02:03:04:05:06 >>
adds a new client named 'vmware-1', being identified by the MAC
'01:02:03:04:05:06' to the config-DB. No system will be
associated with this client, yet (so it can't boot anything).
=item B<< slxconfig add-client name=vmware-1 mac=01:02:03:04:05:06 \ >>
=item B<< systems=suse-10.1,debian-4.0 \ >>
=item B<< attr_start_x=no >>
adds a new client named 'vmware-1', being identified by the MAC
'01:02:03:04:05:06' to the config-DB. The systems 'suse-10.1' &
'Debian-4.0' will be associated with this client (so it will
offer these systems for booting).
During boot, the X-server will not be started by this client
(so the systems will stay in console mode).
=back
=head3 Changing a System
=over 8
=item B<< slxconfig change-system name=suse-10.1 attr_start_xdmcp=gnome >>
will change the system named 'suse-10.1' such that it will use
the GNOME session manager.
=item B<< slxconfig change-system name=suse-10.1 add-clients=vmware-1 >>
will associate the client 'vmware-1' with the system named
'suse-10.1'.
=item B<< slxconfig change-system name=suse-10.1 remove-clients=vmware-1 >>
will remove the client 'vmware-1' from the system named
'suse-10.1'.
=back
=head3 Changing a Client
=over 8
=item B<< slxconfig change-client name=PC131 attr_start_snmp=yes >>
will change the client named 'PC131' such that it will start
the SNMP daemon on all systems that it boots.
=item B<< slxconfig change-client name=PC131 add-systems=Debian-4.0 >>
will associate the system 'Debian-4.0' with the client named
'PC131'.
=item B<< slxconfig change-client name=PC131 remove-systems=Debian-4.0 >>
will remove the system 'Debian-4.0' from the client named
'PC131'.
=back
=head3 Removing a System / Client
=over 8
=item B<< slxconfig remove-system name=<system-name> >>
=item B<< slxconfig remove-client name=<client-name> >>
removes the system/client with the given name.
=back
=cut