{"id":35965,"date":"2021-12-03T16:08:05","date_gmt":"2021-12-03T16:08:05","guid":{"rendered":"https:\/\/ubuntuhandbook.org\/?p=35965"},"modified":"2021-12-03T16:24:26","modified_gmt":"2021-12-03T16:24:26","slug":"waiting-for-process-crond","status":"publish","type":"post","link":"https:\/\/ubuntuhandbook.org\/index.php\/2021\/12\/waiting-for-process-crond\/","title":{"rendered":"Fix Slow Shutdown ‘systemd-shutdown[1]: waiting for process: crond’ Issue"},"content":{"rendered":"

\"\"<\/a><\/p>\n

My Ubuntu laptop recently runs into a power-off issue. Every time when I shutdown or reboot the machine, it stuck at blank screen with text message “systemd-shutdown[1]: waiting for process: crond<\/b><\/i>” for more than a minute.<\/p>\n

\"\"<\/a><\/p>\n

According to the keyword ‘crond<\/b>‘, it has something to do with the cron schedule job. And, thanks to this thread<\/a>, user may run the command below to list all current schedule cron jobs:<\/p>\n

find \/etc\/cron* -type f | xargs  ls -ltr<\/pre>\n
And there you’ll find that the schedule job ‘\/etc\/cron.d\/collect<\/b>‘ tries to run an unknown crond<\/b> binary under ‘\/var\/tmp’ every 10th minute (e.g., 5:10, 5:20, 5:30 …). So the problem may not occur when shutdown\/reboot within a few minutes after login. <\/p>\n
\"\"<\/a><\/p>\n
The \/var\/tmp directory stores temporary files or folders that are preserved between system reboots. According to @bird7676 in that thread, the files were probably created by Free Download Manager<\/a>. <\/p>\n
Solution:<\/h3>\n
If you don’t use and have removed the Free Download Manager, simply remove these temporary files as well as the schedule job. <\/p>\n
To do so, either use a system cleaner (e.g., BleachBit), or press Ctrl+Alt+T<\/b> on keyboard to open terminal and run command below to remove the files:<\/p>\n
sudo rm \/etc\/cron.d\/collect \/var\/tmp\/crond \/var\/tmp\/bs<\/pre>\n
If the app is important for you, you may run ‘mv<\/code>‘ command to move the files to another location or backup unfinished downloads before deleting them.<\/p>\n
NOTE: while the binary may be still running though you have removed the file, you may need to shutdown\/reboot twice to check if the problem is fixed.<\/p>","protected":false},"excerpt":{"rendered":"
My Ubuntu laptop recently runs into a power-off issue. Every time when I shutdown or reboot the machine, it stuck at blank screen with text message “systemd-shutdown[1]: waiting for process: crond” for more than a minute. According to the keyword ‘crond‘, it has something to do with the cron schedule job. And, thanks to this […]<\/p>\n","protected":false},"author":1,"featured_media":35967,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[2005],"class_list":["post-35965","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-howtos","tag-systemd"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/ubuntuhandbook.org\/index.php\/wp-json\/wp\/v2\/posts\/35965","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ubuntuhandbook.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ubuntuhandbook.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ubuntuhandbook.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ubuntuhandbook.org\/index.php\/wp-json\/wp\/v2\/comments?post=35965"}],"version-history":[{"count":0,"href":"https:\/\/ubuntuhandbook.org\/index.php\/wp-json\/wp\/v2\/posts\/35965\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ubuntuhandbook.org\/index.php\/wp-json\/wp\/v2\/media\/35967"}],"wp:attachment":[{"href":"https:\/\/ubuntuhandbook.org\/index.php\/wp-json\/wp\/v2\/media?parent=35965"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ubuntuhandbook.org\/index.php\/wp-json\/wp\/v2\/categories?post=35965"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ubuntuhandbook.org\/index.php\/wp-json\/wp\/v2\/tags?post=35965"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}