在服务器上运行 crontab -e编辑定时任务 结果提示 command not found命令找不到，这就说明没安装crontab
由于
完整操作如下：
[root@iZ11pvsxisqZ /]# yum install vixie-cron crontabs
Loaded plugins: security
Setting up Install Process
Package cronie-1.4.-.el6_7..x86_64 already installed and latest version
Package crontabs-1.10-.el6.noarch already installed and latest version
Nothing to do
[root@iZ11pvsxisqZ /]# crontab -l
no crontab for root
[root@iZ11pvsxisqZ /]# service crond status
crond is stopped
[root@iZ11pvsxisqZ /]# service crond start
Starting crond: [ OK ]
[root@iZ11pvsxisqZ /]# ntsysv
[root@iZ11pvsxisqZ /]# chkconfig –level crond on
chkconfig version 1.3.49.3 - Copyright (C) - Red Hat, Inc.
This may be freely redistributed under the terms of the GNU Public License. usage: chkconfig [--list] [--type <type>] [name]
chkconfig --add <name>
chkconfig --del <name>
chkconfig --override <name>
chkconfig [--level <levels>] [--type <type>] <name> <on|off|reset|resetpriorities>
[root@iZ11pvsxisqZ /]# crontab -e
no crontab for root - using an empty one
crontab: no changes made to crontab
分步操作为
开始安装 运行
yum install vixie-cron crontabs
然后它返回很多
Loaded plugins: security
base
epel
epel/primary_db
extras
updates
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package cronie.x86_64 :1.4.-.el6_7. will be installed
--> Processing Dependency: dailyjobs for package: cronie-1.4.-.el6_7..x86_64
--> Processing Dependency: /usr/sbin/sendmail for package: cronie-1.4.-.el6_7..x86_64
--> Running transaction check
---> Package cronie-anacron.x86_64 :1.4.-.el6_7. will be installed
--> Processing Dependency: crontabs for package: cronie-anacron-1.4.-.el6_7..x86_64
---> Package exim.x86_64 :4.84.-.el6 will be installed
--> Running transaction check
---> Package crontabs.noarch :1.10-.el6 will be installed
--> Finished Dependency Resolution Dependencies Resolved ====================================================================================================================================================================
Package Arch Version
====================================================================================================================================================================
Installing:
cronie x86_64 1.4.-.el6_7.
Installing for dependencies:
cronie-anacron x86_64 1.4.-.el6_7.
crontabs noarch 1.10-.el6
exim x86_64 4.84.-.el6 Transaction Summary
====================================================================================================================================================================
Install Package(s) Total download size: 1.4 M
Installed size: 4.2 M
Downloading Packages:
(/): cronie-1.4.-.el6_7..x86_64.rpm
(/): cronie-anacron-1.4.-.el6_7..x86_64.rpm
(/): crontabs-1.10-.el6.noarch.rpm
(/): exim-4.84.-.el6.x86_64.rpm
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : exim-4.84.-.el6.x86_64
Installing : cronie-1.4.-.el6_7..x86_64
Installing : crontabs-1.10-.el6.noarch
Installing : cronie-anacron-1.4.-.el6_7..x86_64
Verifying : crontabs-1.10-.el6.noarch
Verifying : cronie-1.4.-.el6_7..x86_64
Verifying : exim-4.84.-.el6.x86_64
Verifying : cronie-anacron-1.4.-.el6_7..x86_64 Installed:
cronie.x86_64 :1.4.-.el6_7. Dependency Installed:
cronie-anacron.x86_64 :1.4.-.el6_7. crontabs.noarch :1.10-.el6 Complete!
然后我运行 crontab -l
提示 no crontab for root
然后我查看crontab服务状态
service crond status
它提示 crond is stopped
然后我运行service crond start
它提示 Starting crond: [ OK ]
然后我查看开机启动项 ntsysv
然后界面是
然后我把这个服务加入开机服务中 chkconfig –level 35 crond on
然后它提示
[root@iZ11pvsxisqZ /]# chkconfig –level 35 crond on
chkconfig version 1.3.49.3 - Copyright (C) - Red Hat, Inc.
This may be freely redistributed under the terms of the GNU Public License. usage: chkconfig [--list] [--type <type>] [name]
chkconfig --add <name>
chkconfig --del <name>
chkconfig --override <name>
chkconfig [--level <levels>] [--type <type>] <name> <on|off|reset|resetpriorities>
然后我 crontab -e 就进入了定时任务的编辑界面中