Created Tue Jul, 28 2020 at 04:37PM
*ansible-playbook --check* will not make any changes on remote systems. Any module instrumented to support "check mode" will report what changes they would have made rather than making them.
Command:
ansible-playbook sample.yml --check
Documentation: http://docs.ansible.com/ansible/latest/playbooks_checkmode.html
*configtest* runs a configuration file syntax test. It parses the configuration files and either reports Syntax Ok or detailed information about the particular syntax error.
Commands:
apachectl configtest
apachectl -t
httpd -t
Documentation: https://httpd.apache.org/docs/2.4/programs/apachectl.html
named-checkconf** checks the syntax, but not the semantics, of a named configuration file. named-checkzone** checks the syntax and integrity of a zone file.
Commands:
named-checkconf
named-checkconf /etc/named.conf
named-checkzone domain.com /var/named/zone.domain.com
Documentation:
The online tool validates the Ignition and coreos-cloudinit configs used with CoreOS Container Linux servers.
Tool: https://coreos.com/validate Documentation: https://coreos.com/validate
*cupsd -f -t* runs cupsd in the foreground and tests the configuration file for syntax errors.
Commands:
cupsd -f -t
cupsd -f -t -c cupsd.conf
Documentation: https://www.cups.org/doc/man-cupsd.html
dhcpd -t** will test the configuration file for correct syntax, but will not attempt to perform any network operations. dhcpd -T** can be used to test the lease database file in a similar way.
Commands:
dhcpd -t
dhcpd -t -cf dhcpd.conf
dhcpd -T
Documentation: https://linux.die.net/man/8/dhcpd
*docker-compose config* validates the Docker Compose file.
Command:
docker-compose -f docker-compose.yml config
Documentation: https://docs.docker.com/compose/reference/config
*exim -bV* checks that the configuration file is syntactically valid.
Command:
exim -bV
Documentation: https://github.com/Exim/exim/wiki/TestingExim
*fluentd --dry-run* checks the Fluentd configuration without plugins start.
Command:
fluentd --dry-run -c fluent.conf
Documentation: https://docs.fluentd.org/v1.0/articles/config-file#check-configuration-file
sudo pfctl -nf /etc/pf.conf
*haproxy -c* checks the config file and exits with code 0 if no error was found, or exits with code 1 if a syntax error was found.
Command:
haproxy -c -f haproxy.cfg
Documentation: https://linux.die.net/man/1/haproxy
*python -m json.tool* provides a simple command line interface to validate and pretty-print JSON objects.
Command:
python -m json.tool sample.json > /dev/null
Documentation: https://docs.python.org/3/library/json.html#module-json.tool
*ksvalidator* verifies the syntax of a kickstart file, a text file that contains configuration information for a Red Hat Enterprise Linux installation.
Command:
ksvalidator -i
Documentation: https://www.mankier.com/1/ksvalidator
*lighttpd -t* tests the configuration file for syntax errors and exits.
Command:
lighttpd -t -f lighttpd.conf
Documentation: https://linux.die.net/man/8/lighttpd
*monit -t* run the syntax check for the control file.
Command:
monit -t
Documentation: https://linux.die.net/man/1/monit
*mysqld --help --verbose* checks the MySQL configuration.
Command:
mysqld --help --verbose 1>/dev/null
Documentation: https://dev.mysql.com/doc/refman/5.7/en/server-options.html
*nagios -v* verifies the information in the configuration files. Nagios will not start monitoring any hosts.
Commands:
nagios -v
nagios -v nagios.cfg
Documentation: https://assets.nagios.com/downloads/nagioscore/docs/nagioscore/4/en/verifyconfig.html
nginx -t** checks the configuration file for correct syntax and tries to open files referred in configuration. gixy** is a NGINX configuration static analyzer.
Commands:
nginx -t
nginx -t -c nginx.conf
gixy
Documentation:
*ntpd -n* runs Configtest mode. It only checks the configuration file for validity.
Command:
ntpd -n
Documentation: https://man.openbsd.org/ntpd
*slapd -Tt* tests whether the configuration file is correct or not.
Commands:
slapd -Tt
slapd -Tt -f /etc/openldap/slapd.conf
Documentation: https://linux.die.net/man/8/slapd
*php -i* shows PHP information.
Command:
php -i
Documentation: http://php.net/manual/en/features.commandline.options.php
*postfix check* warns about bad directory/file ownership or permissions, and creates missing directories.
Command:
postfix check
Documentation: http://www.postfix.org/postfix.1.html
*pg_ctl reload* sends the postgres process a SIGHUP signal, causing it to reread its configuration files (postgresql.conf, pg_hba.conf). Validation errors will prevent the config from being reloaded, and errors will be logged into the Postgres log file.
Command:
pg_ctl reload
Documentation: https://www.postgresql.org/docs/9.5/static/app-pg-ctl.html
*puppet parser validate* validates the syntax of one or more Puppet manifests. It validates the Puppet DSL syntax without compiling a catalog or syncing any resources.
Commands:
puppet parser validate
puppet parser validate manifest.pp
Documentation: https://puppet.com/docs/puppet/5.3/man/parser.html
*rsyslogd -N 1* checks the configuration file for correctness. This option is meant to verify a config file.
Command:
rsyslogd -N 1 -f /etc/rsyslog.conf
Documentation: https://linux.die.net/man/8/rsyslogd
syslog-ng --syntax-only --cfgfile=file-to-check
*testparm* is a simple test program to check an smbd configuration file for internal correctness.
Command:
testparam -s
Documentation: https://www.samba.org/samba/docs/man/manpages-3/testparm.1.html
splunk cmd btool check** checks for typos in stanza and setting names. This is the same conf checker that runs on splunk start**.
Command:
splunk cmd btool check
Documentation: http://docs.splunk.com/Documentation/Splunk/7.0.1/Troubleshooting/Usebtooltotroubleshootconfigurations
*squid -k parse* verifies the squid.conf file is valid.
Command:
squid -k parse
Documentation: https://linux.die.net/man/8/squid
sshd -t** is test mode. Only checks the validity of the configuration file and sanity of the keys. sshd -T** is extended test mode. Checks the validity of the configuration file, outputs the effective configuration to stdout and then exits.
Commands:
sshd -t
sshd -T
Documentation: https://linux.die.net/man/8/sshd
*syslogd -d* turns on debug mode, and writes much debug information on the current tty.
Commands:
syslogd -d
syslogd -d -f /etc/syslog.conf
Documentation: https://linux.die.net/man/8/syslogd
*syslog-ng -s* verifies the syslog-ng configuration file is syntactically correct and exits.
Commands:
syslog-ng -s -f syslog-ng.conf
syslog-ng --syntax-only --cfgfile=syslog-ng.conf
Documentation: https://linux.die.net/man/8/syslog-ng
*tcpdchk* examines your tcp wrapper configuration and reports all potential and real problems it can find.
Command:
tcpdchk
Documentation: https://www.freebsd.org/cgi/man.cgi?query=tcpdchk
*terraform validate* validates the syntax of the terraform files. Terraform performs a syntax check on all the terraform files in the directory.
Command:
terraform validate
Documentation: https://www.terraform.io/docs/commands/validate.html
*travis lint* validates a .travis.yml reduces common build errors such as invalid YAML, missing language keys and unsupported runtime versions.
Command:
travis lint .travis.yml
Documentation: https://docs.travis-ci.com/user/travis-lint
*varnishd -C* compiles the vlc file and if there's a problem, displays a compiler error.
Command:
varnishd -C -f sample.vlc
Documentation: https://linux.die.net/man/1/varnishd
*vsftpd olisten=NO* starts vsftpd and runs the configuration check, without listening on the network.
Command:
vsftpd olisten=NO
Documentation: https://linux.die.net/man/8/vsftpd
*xmllint --schema* validates an XML file against an XML schema. xmllink is part of libxml.
Command:
xmllint --noout --schema sample.xsd sample.xml
Documentation: http://xmlsoft.org/xmllint.html
*Xorg -config* tests manually created Xorg configuration files.
Command:
Xorg -config xorg.conf
Documentation: https://www.freebsd.org/doc/handbook/x-config.html
*yaml.rb* module provides a Ruby interface for data serialization in YAML format.
Command:
ruby -e "require 'yaml'; puts YAML.load_file('./data.yaml')"
Documentation: https://ruby-doc.org/stdlib-1.9.3/libdoc/yaml/rdoc/YAML.html