1. Introduction
I have a CentOS 6.3 which was without cron package installed. When I tried running crond service it says “unrecognized service”. Besides, when try to edit the crontab, it getting “crontab: command not found” warning. In minimum CentOS 6.3 installation, crond (vixie-cron) was not installed. The following is the common errors or warnings returned when crond service is not installed.
2. Install step by step
Examples :
[root@centos63 ~]# service crond status
crond: unrecognized service
[root@centos63 ~]# crontab -e
-bash: crontab: command not found
Solution :In order to install crond service, you need to run “yum install vixie-cron” as below :
[root@centos63 ~]# yum install vixie-cron -y
Examples :[root@centos63 ~]# yum install vixie-cron -y
Loaded plugins: fastestmirror, presto
Loading mirror speeds from cached hostfile
* base: ossm.utm.my
* extras: ossm.utm.my
* rpmforge: mirror.oscc.org.my
* updates: ossm.utm.my
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package cronie.i686 0:1.4.4-7.el6 will be installed
--> Processing Dependency: dailyjobs for package: cronie-1.4.4-7.el6.i686
--> Processing Dependency: /usr/sbin/sendmail for package: cronie-1.4.4-7.el6.i686
--> Running transaction check
---> Package cronie-anacron.i686 0:1.4.4-7.el6 will be installed
--> Processing Dependency: crontabs for package: cronie-anacron-1.4.4-7.el6.i686
---> Package postfix.i686 2:2.6.6-2.2.el6_1 will be installed
--> Processing Dependency: cyrus-sasl >= 2.1.10 for package: 2:postfix-2.6.6-2.2.el6_1.i686
--> Running transaction check
---> Package crontabs.noarch 0:1.10-33.el6 will be installed
---> Package cyrus-sasl.i686 0:2.1.23-13.el6 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
====================================================================================================
Package Arch Version Repository Size
====================================================================================================
Installing:
cronie i686 1.4.4-7.el6 base 70 k
Installing for dependencies:
cronie-anacron i686 1.4.4-7.el6 base 29 k
crontabs noarch 1.10-33.el6 base 10 k
cyrus-sasl i686 2.1.23-13.el6 base 77 k
postfix i686 2:2.6.6-2.2.el6_1 base 2.0 M
Transaction Summary
====================================================================================================
Install 5 Package(s)
Total download size: 2.2 M
Installed size: 9.6 M
Downloading Packages:
Setting up and reading Presto delta metadata
Processing delta metadata
Package(s) data still to download: 2.2 M
(1/5): cronie-1.4.4-7.el6.i686.rpm | 70 kB 00:00
(2/5): cronie-anacron-1.4.4-7.el6.i686.rpm | 29 kB 00:00
(3/5): crontabs-1.10-33.el6.noarch.rpm | 10 kB 00:00
(4/5): cyrus-sasl-2.1.23-13.el6.i686.rpm | 77 kB 00:00
(5/5): postfix-2.6.6-2.2.el6_1.i686.rpm | 2.0 MB 00:22
----------------------------------------------------------------------------------------------------
Total 93 kB/s | 2.2 MB 00:24
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : cyrus-sasl-2.1.23-13.el6.i686 1/5
Installing : 2:postfix-2.6.6-2.2.el6_1.i686 2/5
Installing : crontabs-1.10-33.el6.noarch 3/5
Installing : cronie-anacron-1.4.4-7.el6.i686 4/5
Installing : cronie-1.4.4-7.el6.i686 5/5
Verifying : 2:postfix-2.6.6-2.2.el6_1.i686 1/5
Verifying : crontabs-1.10-33.el6.noarch 2/5
Verifying : cyrus-sasl-2.1.23-13.el6.i686 3/5
Verifying : cronie-1.4.4-7.el6.i686 4/5
Verifying : cronie-anacron-1.4.4-7.el6.i686 5/5
Installed:
cronie.i686 0:1.4.4-7.el6
Dependency Installed:
cronie-anacron.i686 0:1.4.4-7.el6 crontabs.noarch 0:1.10-33.el6 cyrus-sasl.i686 0:2.1.23-13.el6
postfix.i686 2:2.6.6-2.2.el6_1
Complete!
[root@centos63 ~]# which crond
/usr/sbin/crond
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