What Scripts Are Executed When /scripts/upcp Runs?

Several scripts are executed when the cPanel /scripts/upcp script runs for updates and maintenance.

Not all of these scripts will be run each time /scripts/upcp is executed. This guide only shows you what scripts are expected to be executed when /scripts/upcp is running. 

• Executed under /scripts/upcp:

/usr/local/cpanel/scripts/upcp
/usr/local/cpanel/scripts/gather-update-logs
/usr/local/cpanel/scripts/hook
/usr/local/cpanel/scripts/hook --category=System --event=upcp --stage=post
/usr/local/cpanel/scripts/hook --category=System --event=upcp --stage=pre
/usr/local/cpanel/scripts/maintenance --log= . $logfile_path --pbar-start=20 --pbar-stop=95
/usr/local/cpanel/scripts/maintenance --post --log= . $logfile_path --pbar-start=55 --pbar-stop=95
/usr/local/cpanel/scripts/maintenance --pre --log= . $logfile_path --pbar-start=20 --pbar-stop=30
/usr/local/cpanel/scripts/post_sync_cleanup --log= . $logfile_path --pbar-start=30 --pbar-stop=55
/usr/local/cpanel/scripts/postupcp
/usr/local/cpanel/scripts/preupcp
/usr/local/cpanel/scripts/try-later
/usr/local/cpanel/scripts/upcp
/usr/local/cpanel/scripts/upcp @retain_argv --fromself
/usr/local/cpanel/scripts/upcp-running
/usr/local/cpanel/scripts/updatenow "--log=$logfile_path" --checkremoteversion
/usr/local/cpanel/scripts/updatenow --upcp

• Executed under /usr/local/cpanel/scripts/maintenance:

/usr/local/cpanel/scripts/link_3rdparty_binaries
/usr/local/cpanel/scripts/rdate
/usr/local/cpanel/scripts/find_outdated_services --auto
/usr/local/cpanel/scripts/checkccompiler
/usr/local/cpanel/bin/migrate_all_feature_lists_to_current
/usr/local/cpanel/scripts/mainipcheck
/usr/local/cpanel/scripts/update_neighbor_netblocks
/usr/local/cpanel/scripts/update_known_proxy_ips
/usr/local/cpanel/scripts/check_valid_server_hostname --notify
/usr/local/cpanel/scripts/checkusers
/usr/local/cpanel/scripts/vzzo-fixer
/usr/local/cpanel/scripts/quota_auto_fix
/usr/local/cpanel/scripts/clear_orphaned_virtfs_mounts --inactiveonly
/usr/local/cpanel/scripts/disable_prelink
/usr/local/cpanel/scripts/cleanquotas
/usr/local/cpanel/scripts/autorepair autorepair
/usr/local/cpanel/scripts/purge_old_config_caches
/usr/local/cpanel/scripts/cleansessions
/usr/local/cpanel/scripts/checkbashshell
/usr/local/cpanel/scripts/dnsqueuecron
/usr/local/cpanel/scripts/rebuild_whm_chrome
/usr/local/cpanel/bin/checkallsslcerts --allow-retry --verbose
/usr/local/cpanel/scripts/check_domain_tls_service_domains.pl --prune
/usr/local/cpanel/scripts/clean_up_temp_wheel_users
/usr/local/cpanel/scripts/findphpversion
/usr/local/cpanel/scripts/listcheck
/usr/local/cpanel/scripts/updateuserdomains
/usr/local/cpanel/bin/empty_user_trash --quiet --all
/usr/local/cpanel/bin/empty_user_horde_temp_files --quiet --all
/usr/local/cpanel/scripts/build_maxemails_config
/usr/local/cpanel/scripts/updateuserdatacache --force
/usr/local/cpanel/scripts/check_maxmem_against_domains_count --always-fix
/usr/local/cpanel/scripts/resetmailmanurls
/usr/local/cpanel/scripts/mysqlconnectioncheck
/usr/local/cpanel/bin/postgrescheck --check-auth --reset-pass-on-fail
/usr/local/cpanel/scripts/chkpaths
/usr/local/cpanel/scripts/hackcheck
/usr/local/cpanel/scripts/oopscheck
/usr/local/cpanel/scripts/fixetchosts
/usr/local/cpanel/scripts/check_unreliable_resolvers --notify
/usr/local/cpanel/bin/is_script_stuck --script=autossl_check --time=22h --kill --notify=root
/usr/local/cpanel/scripts/quotacheck
/usr/local/cpanel/scripts/email_archive_maintenance
/usr/local/cpanel/scripts/email_hold_maintenance
/usr/local/cpanel/scripts/expunge_expired_certificates_from_sslstorage
/usr/local/cpanel/scripts/notify_expiring_certificates
/usr/local/cpanel/scripts/notify_expiring_certificates_on_linked_nodes
/usr/local/cpanel/scripts/expunge_expired_transfer_sessions
/usr/local/cpanel/scripts/expunge_expired_pkgacct_sessions
/usr/local/cpanel/scripts/smartcheck
/usr/local/cpanel/scripts/compilerscheck
/usr/local/cpanel/scripts/check_mount_procfs
/usr/local/cpanel/scripts/setup_modsec_db
/usr/local/cpanel/scripts/modsec_vendor update --auto
/usr/local/cpanel/bin/check_cpstore_in_sync_with_local_storage
/usr/local/cpanel/scripts/compilers restore
/usr/local/cpanel/scripts/dovecot_maintenance --background
/usr/local/cpanel/bin/clean-datastores --background root
/usr/local/cpanel/scripts/spamassassin_dbm_cleaner
/usr/local/cpanel/scripts/check_security_advice_changes --notify --background
/usr/local/cpanel/bin/dcpumon --killproc
/usr/local/cpanel/bin/setupdbmap
/usr/local/cpanel/bin/fix_userdata_perms
/usr/local/cpanel/scripts/detect_env_capabilities
/usr/local/cpanel/scripts/manage_greylisting --init --update_common_mail_providers
/usr/local/cpanel/scripts/migrate_local_ini_to_php_ini --run --verbose
/usr/local/cpanel/scripts/check_mysql
/usr/local/cpanel/bin/refresh_plugin_cache
/usr/local/cpanel/scripts/ccs-check --run --ssl
/usr/local/cpanel/scripts/perform_sqlite_auto_rebuild_db_maintenance
/usr/local/cpanel/scripts/vps_optimizer
/usr/local/cpanel/bin/purge_dead_comet_files --quiet
/usr/local/cpanel/scripts/update-packages
/usr/local/cpanel/scripts/process_pending_cpanel_php_pear_registration
/usr/local/cpanel/scripts/sysup
/usr/local/cpanel/scripts/find_and_fix_rpm_issues
/usr/local/cpanel/scripts/updatesigningkey
/usr/local/cpanel/bin/cloudlinux_update
/usr/local/cpanel/scripts/mkwwwacctconf
/usr/local/cpanel/scripts/fixrndc -f
/usr/local/cpanel/scripts/fixrndc
/usr/local/cpanel/scripts/check_cpanel_pkgs
/usr/local/cpanel/scripts/ftpquotacheck
/usr/local/cpanel/scripts/restartsrv mysql
/usr/local/cpanel/scripts/purge_modsec_log
/usr/local/cpanel/scripts/buildeximconf --no_chown_spool
/usr/local/cpanel/scripts/restartsrv_eximstats
/usr/local/cpanel/scripts/litespeed-check --run
/usr/local/cpanel/scripts/jetbackup-check --run
/usr/local/cpanel/bin/wpt_license --download

• Executed under /usr/local/cpanel/scripts/try-later:

/usr/local/cpanel/scripts/cpservice

Please note, the following scripts are usually part of the cPanel hook system, so as a result, they are executed only when there are already custom scripts configured to run during the upcp through the hook system: 

/usr/local/cpanel/scripts/hook
/usr/local/cpanel/scripts/postupcp
/usr/local/cpanel/scripts/preupcp

These three could also execute other scripts, depending on what has been hooked to them.

You can refer to this link for more information on how hooks work in cPanel:

Guide to Standardized Hooks