在CentOS下安装crontab服务

在CentOS下安装crontab服务

 

今天在测试机上配置crontab时发现它没有安装，所以赶紧安装一个.

 

CentOS 版本：5.7

 

操作步骤

 

1. 确认crontab是否安装：

执行 crontab 命令如果报 command not found，就表明没有安装

2. 安装 crontab

执行 yum install -y vixie-cron

3. 确认是否安装成功:

执行 crontab -l

4. 看是否设置了开机自动启动

chkconfig --list crond

5. 启动crontab

service crond start

 

 

详细记录

[root@node16 eap_designer]# crontab -e
-bash: crontab: command not found
[root@node16 eap_designer]# yum install -y crontab
Loaded plugins: fastestmirror
Determining fastest mirrors
 * base: centos.ustc.edu.cn
 * extras: centos.ustc.edu.cn
 * updates: centos.ustc.edu.cn
base                                                                                                         | 1.1 kB     00:00    
extras                                                                                                       | 2.1 kB     00:00    
extras/primary_db                                                                                            | 171 kB     00:00    
updates                                                                                                      | 1.9 kB     00:00    
updates/primary_db                                                                                           | 464 kB     00:01    
Setting up Install Process
No package crontab available.
Nothing to do
[root@node16 eap_designer]# yum install -y cron
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: centos.ustc.edu.cn
 * extras: centos.ustc.edu.cn
 * updates: centos.ustc.edu.cn
Setting up Install Process
No package cron available.
Nothing to do
[root@node16 eap_designer]# yum install -y crond
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: centos.ustc.edu.cn
 * extras: centos.ustc.edu.cn
 * updates: centos.ustc.edu.cn
Setting up Install Process
No package crond available.
Nothing to do
[root@node16 eap_designer]# yum install -y crontab
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: centos.ustc.edu.cn
 * extras: centos.ustc.edu.cn
 * updates: centos.ustc.edu.cn
Setting up Install Process
No package crontab available.
Nothing to do
[root@node16 eap_designer]# yum install -y crontabs
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: centos.ustc.edu.cn
 * extras: centos.ustc.edu.cn
 * updates: centos.ustc.edu.cn
Setting up Install Process
Package crontabs-1.10-8.noarch already installed and latest version
Nothing to do
[root@node16 eap_designer]# crontab
-bash: crontab: command not found

 

[root@node16 eap_designer]# cd
[root@node16 ~]#
[root@node16 ~]#

查了一下资料，才知道它不叫cron,crond,crontab,crontabs，它叫vixie-cron
[root@node16 ~]# yum install -y vixie-cron
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: centos.ustc.edu.cn
 * extras: centos.ustc.edu.cn
 * updates: centos.ustc.edu.cn
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package vixie-cron.i386 4:4.1-77.el5_4.1 set to be updated
--> Finished Dependency Resolution

Dependencies Resolved

====================================================================================================================================
 Package                         Arch                      Version                                  Repository                 Size
====================================================================================================================================
Installing:
 vixie-cron                      i386                      4:4.1-77.el5_4.1                         base                       79 k

Transaction Summary
====================================================================================================================================
Install       1 Package(s)
Upgrade       0 Package(s)

Total download size: 79 k
Downloading Packages:
vixie-cron-4.1-77.el5_4.1.i386.rpm                                                                           |  79 kB     00:00    
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing     : vixie-cron                                                                                                   1/1

Installed:
  vixie-cron.i386 4:4.1-77.el5_4.1                                                                                                 

Complete!

 

[root@node16 ~]# crontab -l
no crontab for root
[root@node16 ~]#
[root@node16 ~]# chkconfig --list crontab
在 crontab 服务中读取信息时出错：没有那个文件或目录
[root@node16 ~]# chkconfig --list cron
在 cron 服务中读取信息时出错：没有那个文件或目录
[root@node16 ~]# chkconfig --list
anacron         0:关闭  1:关闭  2:启用  3:启用  4:启用  5:启用  6:关闭
avahi-daemon    0:关闭  1:关闭  2:关闭  3:启用  4:启用  5:启用  6:关闭
avahi-dnsconfd  0:关闭  1:关闭  2:关闭  3:关闭  4:关闭  5:关闭  6:关闭
crond           0:关闭  1:关闭  2:启用  3:启用  4:启用  5:启用  6:关闭
gpm             0:关闭  1:关闭  2:启用  3:启用  4:启用  5:启用  6:关闭
haldaemon       0:关闭  1:关闭  2:关闭  3:启用  4:启用  5:启用  6:关闭
iscsi           0:关闭  1:关闭  2:关闭  3:启用  4:启用  5:启用  6:关闭
iscsid          0:关闭  1:关闭  2:关闭  3:启用  4:启用  5:启用  6:关闭
jexec           0:启用  1:启用  2:启用  3:启用  4:启用  5:启用  6:启用
kudzu           0:关闭  1:关闭  2:关闭  3:启用  4:启用  5:启用  6:关闭
lvm2-monitor    0:关闭  1:启用  2:启用  3:启用  4:启用  5:启用  6:关闭
mcstrans        0:关闭  1:关闭  2:启用  3:启用  4:启用  5:启用  6:关闭
messagebus      0:关闭  1:关闭  2:关闭  3:启用  4:启用  5:启用  6:关闭
multipathd      0:关闭  1:关闭  2:关闭  3:关闭  4:关闭  5:关闭  6:关闭
mysql           0:关闭  1:关闭  2:启用  3:启用  4:启用  5:启用  6:关闭
netconsole      0:关闭  1:关闭  2:关闭  3:关闭  4:关闭  5:关闭  6:关闭
netfs           0:关闭  1:关闭  2:关闭  3:启用  4:启用  5:启用  6:关闭
netplugd        0:关闭  1:关闭  2:关闭  3:关闭  4:关闭  5:关闭  6:关闭
network         0:关闭  1:关闭  2:启用  3:启用  4:启用  5:启用  6:关闭
rawdevices      0:关闭  1:关闭  2:关闭  3:启用  4:启用  5:启用  6:关闭
rdisc           0:关闭  1:关闭  2:关闭  3:关闭  4:关闭  5:关闭  6:关闭
restorecond     0:关闭  1:关闭  2:启用  3:启用  4:启用  5:启用  6:关闭
sshd            0:关闭  1:关闭  2:启用  3:启用  4:启用  5:启用  6:关闭
syslog          0:关闭  1:关闭  2:启用  3:启用  4:启用  5:启用  6:关闭
tcsd            0:关闭  1:关闭  2:关闭  3:关闭  4:关闭  5:关闭  6:关闭
xfs             0:关闭  1:关闭  2:启用  3:启用  4:启用  5:启用  6:关闭
[root@node16 ~]# chkconfig --list crond
crond           0:关闭  1:关闭  2:启用  3:启用  4:启用  5:启用  6:关闭
[root@node16 ~]# service crond
用法： /etc/init.d/crond {start|stop|status|reload|restart|condrestart}
[root@node16 ~]# service crond status
crond 已停
[root@node16 ~]#

 

 

[root@node16 ~]#
[root@node16 ~]# service crond start
启动 crond：                                               [确定]
[root@node16 ~]# service crond status
crond (pid  16932) 正在运行...
[root@node16 ~]#