Crontab is a utility in Unix-like operating systems that allows users to schedule jobs (commands or scripts) to run automatically at specified times or intervals. It is very useful for performing routine tasks such as backups, system maintenance, and other automated processes.<\/p>\n
\r\n[root@centos62 ~]# crontab -e\r\nbash: crontab: command not found\r\n<\/pre>\nIn this guide, we will show you how to install crontab on CentOS 6.2.<\/p>\n
Step 1: Update Your System<\/h2>\n
Before installing crontab, it is important to make sure your system is up-to-date. You can do this by running the following command:<\/p>\n
sudo yum update<\/pre>\nThis command will update your system’s packages and dependencies.<\/p>\n
Step 2: Install Crontab<\/h2>\n
To install crontab on CentOS 6.2, run the following command:<\/p>\n
sudo yum install cronie<\/pre>\nThis command will install the cronie package, which includes the crontab utility.<\/p>\n
\r\nLoaded plugins: fastestmirror\r\nLoading mirror speeds from cached hostfile\r\n * base: mirror.averse.net\r\n * epel: ftp.jaist.ac.jp\r\n * extras: mirror.averse.net\r\n * updates: mirror.issp.co.th\r\nSetting up Install Process\r\nResolving Dependencies\r\n--> Running transaction check\r\n---> Package cronie.i686 0:1.4.4-7.el6 will be installed\r\n--> Processing Dependency: dailyjobs for package: cronie-1.4.4-7.el6.i686\r\n--> Processing Dependency: \/usr\/sbin\/sendmail for package: cronie-1.4.4-7.el6.i686\r\n--> Running transaction check\r\n---> Package cronie-anacron.i686 0:1.4.4-7.el6 will be installed\r\n--> Processing Dependency: crontabs for package: cronie-anacron-1.4.4-7.el6.i686\r\n---> Package exim.i686 0:4.72-2.el6 will be installed\r\n--> Running transaction check\r\n---> Package crontabs.noarch 0:1.10-33.el6 will be installed\r\n--> Finished Dependency Resolution\r\n\r\nDependencies Resolved\r\n\r\n====================================================================================================\r\n Package Arch Version Repository Size\r\n====================================================================================================\r\nInstalling:\r\n cronie i686 1.4.4-7.el6 CentOS6.2-Repository 70 k\r\nInstalling for dependencies:\r\n cronie-anacron i686 1.4.4-7.el6 CentOS6.2-Repository 29 k\r\n crontabs noarch 1.10-33.el6 CentOS6.2-Repository 10 k\r\n exim i686 4.72-2.el6 epel 1.2 M\r\n\r\nTransaction Summary\r\n====================================================================================================\r\nInstall 4 Package(s)\r\n\r\nTotal download size: 1.3 M\r\nInstalled size: 3.9 M\r\nDownloading Packages:\r\n(1\/4): exim-4.72-2.el6.i686.rpm | 1.2 MB 00:11\r\n----------------------------------------------------------------------------------------------------\r\nTotal 111 kB\/s | 1.3 MB 00:12\r\nRunning rpm_check_debug\r\nRunning Transaction Test\r\nTransaction Test Succeeded\r\nRunning Transaction\r\n Installing : exim-4.72-2.el6.i686 1\/4\r\n Installing : cronie-1.4.4-7.el6.i686 2\/4\r\n Installing : crontabs-1.10-33.el6.noarch 3\/4\r\n Installing : cronie-anacron-1.4.4-7.el6.i686 4\/4\r\n\r\nInstalled:\r\n cronie.i686 0:1.4.4-7.el6\r\n\r\nDependency Installed:\r\n cronie-anacron.i686 0:1.4.4-7.el6 crontabs.noarch 0:1.10-33.el6 exim.i686 0:4.72-2.el6\r\n\r\nComplete!\r\n<\/pre>\nStep 3: Start the Crond Service<\/h2>\n
Now that crontab is installed, you need to start the crond service. Run the following command:<\/p>\n
sudo service crond start<\/pre>\nThis command will start the crond service and enable it to run at system startup.<\/p>\n
Step 4: Verify Crontab Installation<\/h2>\n
To verify that crontab is installed and working correctly, you can create a test cron job. Run the following command:<\/p>\n
crontab -e<\/pre>\nThis command will open the crontab editor. Add the following line to the file:<\/p>\n
* * * * * echo \"Hello World\" >> \/tmp\/crontab-test.txt<\/pre>\nThis cron job will run every minute and append the text “Hello World” to the file \/tmp\/crontab-test.txt. Save and exit the crontab editor by pressing Ctrl + X, then Y, and finally Enter.<\/p>\n
Wait a minute, and then check the contents of the file \/tmp\/crontab-test.txt by running the following command:<\/p>\n
cat \/tmp\/crontab-test.txt<\/pre>\nIf crontab is working correctly, you should see the text “Hello World” in the file.<\/p>\n
Commands Mentioned:<\/h2>\n
\n
- sudo yum update<\/span> – Update your system<\/li>\n
- sudo yum install cronie<\/span> – Install crontab<\/li>\n
- sudo service crond start<\/span> – Start the crond service<\/li>\n
- crontab -e<\/span> – Open the crontab editor<\/li>\n
- cat \/tmp\/crontab-test.txt<\/span> – Check the contents of the file `\/tmp\/crontab-test.txt`<\/li>\n<\/ul>\n
Conclusion<\/h2>\n
In this guide, we have shown you how to install crontab on CentOS 6.2. By following these steps, you can schedule jobs to run automatically at specified times or intervals, which can save you time and effort in performing routine tasks. We hope this guide has been helpful to you. If you have any comments or suggestions for improvements, please feel free to share them below.<\/p>\n","protected":false},"excerpt":{"rendered":"
Crontab is a utility in Unix-like operating systems that allows users to schedule jobs (commands or scripts) to run automatically at specified times or intervals. It is very useful for…<\/p>\n","protected":false},"author":6,"featured_media":1554,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"wds_primary_category":0,"footnotes":""},"categories":[2055,1136],"tags":[1253,1996,1536],"class_list":["post-2592","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-centos","category-cronjob","tag-centos-6-2","tag-cron","tag-linux"],"_links":{"self":[{"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/posts\/2592","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/comments?post=2592"}],"version-history":[{"count":0,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/posts\/2592\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/media\/1554"}],"wp:attachment":[{"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/media?parent=2592"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/categories?post=2592"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/tags?post=2592"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}