After migration our site TecAdmin.net to new VPS (CentOS 6.5) on digital ocean hosting we found that Crontab is not installed on server, When I try to execute crontab -l command, I found following error.

# crontab -l

-bash: crontab: command not found

After checking the package of crontab command in our older system, I found it comes from cronie package. So i think to write it for TecAdmin.net readers. Use below command to install it. this will install required dependencies also

Install Crontab

# yum install cronie
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirror.web-ster.com
 * updates: mirror.stanford.edu
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package cronie.x86_64 0:1.4.4-12.el6 will be installed
--> Processing Dependency: dailyjobs for package: cronie-1.4.4-12.el6.x86_64
--> Running transaction check
---> Package cronie-anacron.x86_64 0:1.4.4-12.el6 will be installed
--> Processing Dependency: crontabs for package: cronie-anacron-1.4.4-12.el6.x86_64
--> Running transaction check
---> Package crontabs.noarch 0:1.10-33.el6 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package                        Arch      Version           Repository     Size
================================================================================
Installing:
 cronie                         x86_64    1.4.4-12.el6      base           73 k
Installing for dependencies:
 cronie-anacron                 x86_64    1.4.4-12.el6      base           30 k
 crontabs                       noarch    1.10-33.el6       base           10 k

Transaction Summary
==========================================================
Install       3 Package(s)

Total download size: 114 k
Installed size: 220 k
Is this ok [y/N]: y
Downloading Packages:
(1/3): cronie-1.4.4-12.el6.x86_64.rpm                         |  73 kB     00:00
(2/3): cronie-anacron-1.4.4-12.el6.x86_64.rpm                 |  30 kB     00:00
(3/3): crontabs-1.10-33.el6.noarch.rpm                        |  10 kB     00:00
--------------------------------------------------------------------------------
Total                                                336 kB/s | 114 kB     00:00
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : cronie-1.4.4-12.el6.x86_64                   1/3
  Installing : crontabs-1.10-33.el6.noarch                  2/3
  Installing : cronie-anacron-1.4.4-12.el6.x86_64                           3/3
  Verifying  : crontabs-1.10-33.el6.noarch                                  1/3
  Verifying  : cronie-anacron-1.4.4-12.el6.x86_64                           2/3
  Verifying  : cronie-1.4.4-12.el6.x86_64                                   3/3

Installed:
  cronie.x86_64 0:1.4.4-12.el6

Dependency Installed:
  cronie-anacron.x86_64 0:1.4.4-12.el6            crontabs.noarch 0:1.10-33.el6

Complete!

How to Add New Job in Crontab

To add a new cron use crontab -e to edit it in editor and add cron as per your requirments. In filesystem crons are saved in file /var/spool/cron/<username&gt;.

# crontab -e

Read below article to read more about Crontab with 20 useful examples.

Crontab in Linux with 20 Useful Examples to Schedule Jobs

How to List Jobs in Crontab

To list the job scheduler under crontab, we can use -l command line switch with crontab command. For example to list jobs scheduled for current user

# crontab -l

To view jobs scheduled under other user specify username with -a switch like below.

# crontab -u <username> -l