计划任务at

网友投稿 535 2022-09-22

计划任务at

2013-03-09 saturday

1、查询软件是否安装

[root@desktop4 ~]# rpm -q at

at-3.1.10-43.el6.x86_64

[root@desktop4 ~]#

2、服务是否开启

[root@desktop4 ~]# service atd status

atd (pid 2281) is running...

[root@desktop4 ~]# service atd stop

Stopping atd:

[ OK ]

[root@desktop4 ~]# service atd start

Starting atd:

[ OK ]

[root@desktop4 ~]# service atd status

atd (pid 4030) is running...

[root@desktop4 ~]#

3、设置长期有效

[root@desktop4 ~]# chkconfig --list atd

atd 0:off 1:off 2:off 3:on 4:on 5:on 6:off

[root@desktop4 ~]#

[root@desktop4 ~]# chkconfig --level 35 atd off

[root@desktop4 ~]#

[root@desktop4 ~]# chkconfig --list atd

atd 0:off 1:off 2:off 3:off 4:on 5:off 6:off

[root@desktop4 ~]#

[root@desktop4 ~]# chkconfig --level 35 atd on

[root@desktop4 ~]#

[root@desktop4 ~]# chkconfig --list atd

atd 0:off 1:off 2:off 3:on 4:on 5:on 6:off

[root@desktop4 ~]#

4、管理at工作

（1）建立at工作

[root@desktop4 ~]# at 15:30

at> init 6

at>

job 2 at 2013-03-09 15:30

[root@desktop4 ~]#

（2）查询at队列

[root@desktop4 ~]# atq

2 2013-03-09 15:30 a root

[root@desktop4 ~]#

[root@desktop4 ~]# at -l

2 2013-03-09 15:30 a root

[root@desktop4 ~]#

（3）查看at工作内容

[root@desktop4 ~]# at -c 2

#!/bin/sh

# atrun uid=0 gid=0

# mail root 0

umask 22

ORBIT_SOCKETDIR=/tmp/orbit-root; export ORBIT_SOCKETDIR

HOSTNAME=desktop4.example.com; export HOSTNAME

IMSETTINGS_INTEGRATE_DESKTOP=yes; export IMSETTINGS_INTEGRATE_DESKTOP

SHELL=/bin/bash; export SHELL

XDG_SESSION_COOKIE=551055dcd66cd454041dddca00000022-1362812677.11524-871624707; export XDG_SESSION_COOKIE

HISTSIZE=1000; export HISTSIZE

GTK_RC_FILES=/etc/gtk/gtkrc:/root/.gtkrc-1.2-gnome2; export GTK_RC_FILES

WINDOWID=18874371; export WINDOWID

QTDIR=/usr/lib64/qt-3.3; export QTDIR

QTINC=/usr/lib64/qt-3.3/include; export QTINC

IMSETTINGS_MODULE=X\ compose\ table; export IMSETTINGS_MODULE

USER=root; export USER

LS_COLORS=rs=0:di=01\;34:ln=01\;36:mh=00:pi=40\;33:so=01\;35:do=01\;35:bd=40\;33\;01:cd=40\;33\;01:or=40\;31\;01:mi=01\;05\;37\;41:su=37\;41:sg=30\;43:ca=30\;41:tw=30\;42:ow=34\;42:st=37\;44:ex=01\;32:\*.tar=01\;31:\*.tgz=01\;31:\*.arj=01\;31:\*.taz=01\;31:\*.lzh=01\;31:\*.lzma=01\;31:\*.tlz=01\;31:\*.txz=01\;31:\*.zip=01\;31:\*.z=01\;31:\*.Z=01\;31:\*.dz=01\;31:\*.gz=01\;31:\*.lz=01\;31:\*.xz=01\;31:\*.bz2=01\;31:\*.tbz=01\;31:\*.tbz2=01\;31:\*.bz=01\;31:\*.tz=01\;31:\*.deb=01\;31:\*.rpm=01\;31:\*.jar=01\;31:\*.rar=01\;31:\*.ace=01\;31:\*.zoo=01\;31:\*.cpio=01\;31:\*.7z=01\;31:\*.rz=01\;31:\*.jpg=01\;35:\*.jpeg=01\;35:\*.gif=01\;35:\*.bmp=01\;35:\*.pbm=01\;35:\*.pgm=01\;35:\*.ppm=01\;35:\*.tga=01\;35:\*.xbm=01\;35:\*.xpm=01\;35:\*.tif=01\;35:\*.tiff=01\;35:\*.png=01\;35:\*.svg=01\;35:\*.svgz=01\;35:\*.mng=01\;35:\*.pcx=01\;35:\*.mov=01\;35:\*.mpg=01\;35:\*.mpeg=01\;35:\*.m2v=01\;35:\*.mkv=01\;35:\*.ogm=01\;35:\*.mp4=01\;35:\*.m4v=01\;35:\*.mp4v=01\;35:\*.vob=01\;35:\*.qt=01\;35:\*.nuv=01\;35:\*.wmv=01\;35:\*.asf=01\;35:\*.rm=01\;35:\*.rmvb=01\;35:\*.flc=01\;35:\*.avi=01\;35:\*.fli=01\;35:\*.flv=01\;35:\*.gl=01\;35:\*.dl=01\;35:\*.xcf=01\;35:\*.xwd=01\;35:\*.yuv=01\;35:\*.cgm=01\;35:\*.emf=01\;35:\*.axv=01\;35:\*.anx=01\;35:\*.ogv=01\;35:\*.ogx=01\;35:\*.aac=01\;36:\*.au=01\;36:\*.flac=01\;36:\*.mid=01\;36:\*.midi=01\;36:\*.mka=01\;36:\*.mp3=01\;36:\*.mpc=01\;36:\*.ogg=01\;36:\*.ra=01\;36:\*.wav=01\;36:\*.axa=01\;36:\*.oga=01\;36:\*.spx=01\;36:\*.xspf=01\;36:; export LS_COLORS

GNOME_KEYRING_SOCKET=/tmp/keyring-IroWjf/socket; export GNOME_KEYRING_SOCKET

SSH_AUTH_SOCK=/tmp/keyring-IroWjf/socket.ssh; export SSH_AUTH_SOCK

SESSION_MANAGER=local/unix:@/tmp/.ICE-unix/3639,unix/unix:/tmp/.ICE-unix/3639; export SESSION_MANAGER

USERNAME=root; export USERNAME

DESKTOP_SESSION=gnome; export DESKTOP_SESSION

MAIL=/var/spool/mail/root; export MAIL

PATH=/usr/lib64/qt-3.3/bin:/usr/local/sbin:/usr/sbin:/sbin:/usr/local/bin:/usr/bin:/bin:/root/bin; export PATH

QT_IM_MODULE=xim; export QT_IM_MODULE

PWD=/root; export PWD

XMODIFIERS=@im=none; export XMODIFIERS

GDM_KEYBOARD_LAYOUT=us; export GDM_KEYBOARD_LAYOUT

LANG=en_US.UTF-8; export LANG

GNOME_KEYRING_PID=3630; export GNOME_KEYRING_PID

GDM_LANG=en_US.UTF-8; export GDM_LANG

GDMSESSION=gnome; export GDMSESSION

SSH_ASKPASS=/usr/libexec/openssh/gnome-ssh-askpass; export SSH_ASKPASS

HISTCONTROL=ignoredups; export HISTCONTROL

HOME=/root; export HOME

SHLVL=2; export SHLVL

GNOME_DESKTOP_SESSION_ID=this-is-deprecated; export GNOME_DESKTOP_SESSION_ID

LOGNAME=root; export LOGNAME

QTLIB=/usr/lib64/qt-3.3/lib; export QTLIB

CVS_RSH=ssh; export CVS_RSH

DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-DQHKoNPeN6,guid=37107fffffb40e5e3cb136c9000008cb; export DBUS_SESSION_BUS_ADDRESS

LESSOPEN=\|/usr/bin/lesspipe.sh\ %s; export LESSOPEN

WINDOWPATH=7; export WINDOWPATH

G_BROKEN_FILENAMES=1; export G_BROKEN_FILENAMES

XAUTHORITY=/var/run/gdm/auth-for-root-bntku9/database; export XAUTHORITY

COLORTERM=gnome-terminal; export COLORTERM

cd /root || {

echo 'Execution directory inaccessible' >&2

exit 1

}

${SHELL:-/bin/sh} << 'marcinDELIMITER36c5ca6e'

init 6

marcinDELIMITER36c5ca6e

[root@desktop4 ~]#

（4）删除at工作队列

[root@desktop4 ~]# atrm 2

（5）查询结果

[root@desktop4 ~]# atq

[root@desktop4 ~]#

[root@desktop4 ~]# at -l

[root@desktop4 ~]#

5、at服务的访问控制

[root@desktop4 ~]# cat /etc/at.allow

cat: /etc/at.allow: No such file or directory

[root@desktop4 ~]# cat /etc/at.deny

（1）编辑允许使用at的用户

[root@desktop4 ~]# vim /etc/at.allow

chenglong

lilianjie

lixiaolong

（2）编辑拒绝使用at的用户

[root@desktop4 ~]# vim /etc/at.deny

lilianjie

lixiaolong

linxinru

（3）编辑用户

[root@desktop4 ~]# useradd chenglong

[root@desktop4 ~]# passwd chenglong

Changing password for user chenglong.

New password:

BAD PASSWORD: it is based on a dictionary word

BAD PASSWORD: is too simple

Retype new password:

passwd: all authentication tokens updated successfully.

[root@desktop4 ~]# useradd lilianjie

[root@desktop4 ~]# passwd lilianjie

Changing password for user lilianjie.

New password:

BAD PASSWORD: it is based on a dictionary word

BAD PASSWORD: is too simple

Retype new password:

passwd: all authentication tokens updated successfully.

[root@desktop4 ~]# useradd lixiaolong

[root@desktop4 ~]# passwd lixiaolong

Changing password for user lixiaolong.

New password:

BAD PASSWORD: it is based on a dictionary word

BAD PASSWORD: is too simple

Retype new password:

passwd: all authentication tokens updated successfully.

[root@desktop4 ~]# useradd linxinru

[root@desktop4 ~]# passwd linxinru

Changing password for user linxinru.

New password:

BAD PASSWORD: it is based on a dictionary word

BAD PASSWORD: is too simple

Retype new password:

passwd: all authentication tokens updated successfully.

[root@desktop4 ~]#

（4）验证

[root@desktop4 ~]# su - chenglong

[chenglong@desktop4 ~]$ pwd

/home/chenglong

[chenglong@desktop4 ~]$ at 16:00

at> vim 001.txt

at>

job 3 at 2013-03-09 16:00

[chenglong@desktop4 ~]$

[chenglong@desktop4 ~]$ exit

logout

[root@desktop4 ~]#

[root@desktop4 ~]# su - lilianjie

[lilianjie@desktop4 ~]$ at 16:00

at> vim 002.txt

at>

job 4 at 2013-03-09 16:00

[lilianjie@desktop4 ~]$

[lilianjie@desktop4 ~]$ exit

logout

[root@desktop4 ~]#

[root@desktop4 ~]# su - lixiaolong

[lixiaolong@desktop4 ~]$ at 16:00

at> vim 003.txt

at>

job 5 at 2013-03-09 16:00

[lixiaolong@desktop4 ~]$ exit

logout

[root@desktop4 ~]#

[root@desktop4 ~]# su - linxinru

[linxinru@desktop4 ~]$

[linxinru@desktop4 ~]$ at 16:00

You do not have permission to use at.

[linxinru@desktop4 ~]$ exit

logout

[root@desktop4 ~]#

（5）查询结果

[root@desktop4 ~]# atq

3 2013-03-09 16:00 a chenglong

4 2013-03-09 16:00 a lilianjie

5 2013-03-09 16:00 a lixiaolong

[root@desktop4 ~]#

（6）清空访问控制列表

[root@desktop4 ~]# vim /etc/at.allow

clear

[root@desktop4 ~]# vim /etc/at.deny

clear

6、备份与还原

（1）首先关闭服务

[root@desktop4 ~]# service atd status

atd (pid 4030) is running...

[root@desktop4 ~]# service atd stop

Stopping atd: [ OK ]

[root@desktop4 ~]# service atd status

atd is stopped

（2）打包文件

[root@desktop4 ~]# tar czf at-backup.tar /etc/at.* /var/spool/at/

tar: Removing leading `/' from member names

（3）删除原文件

[root@desktop4 at]# rm -rf /var/spool/at/*

[root@desktop4 at]#

（4）验证

[root@desktop4 at]# service atd start

Starting atd: [ OK ]

[root@desktop4 ~]# atq

[root@desktop4 ~]#

（5）解包（先停止服务）

[root@desktop7 ~]# service atd stop

Stopping atd: [ OK ]

[root@desktop7 ~]#

[root@desktop4 ~]# cd /

[root@desktop4 /]# tar xvf ~/at-backup.tar

etc/at.allow

etc/at.deny

var/spool/at/a00003015a9500

var/spool/at/a00004015a9500

var/spool/at/a00005015a9500

var/spool/at/spool/

You have new mail in /var/spool/mail/root

[root@desktop4 /]#

[root@desktop7 ~]# service atd start

Starting atd: [ OK ]

[root@desktop7 ~]#

[root@desktop4 /]# atq

3 2013-03-09 16:00 a chenglong

4 2013-03-09 16:00 a lilianjie

5 2013-03-09 16:00 a lixiaolong

[root@desktop4 /]#

发表评论

暂时没有评论，来抢沙发吧~

计划任务at

最近发表

更多内容

小程序SDK

Finclip技术文档

小程序开发

小程序容器

小程序框架

Finclip小程序平台

Finclip用户投稿

车联网

推荐文章

小程序SDK是什么意思？小程序sdk和插件有什么区别？

小程序支付功能怎么实现？

企业app开发流程是什么？

app运营模式有哪些？

小程序多端引流怎么做？

小程序生态分析的机会和威胁

Flutter入门这一篇效率文章就够了

原生与跨平台解决方案分析,跨平台软件开发技术方案

热更新技术：让软件更新变得更加轻松快速

解决方案

银行解决方案

证券解决方案

互联网解决方案

政企OA解决方案

科技解决方案

loT解决方案

信任解决方案

热评文章

AppCan:基于混合模式的移动应用开发,移动混合模

Hybrid App混合模式开发的了解

小程序容器技术助力券商数字营销突围，小程序容器化的意

用mpvue开发微信小程序基础知识（vue.js开发

小程序多端框架全面测评对比，强烈推荐！

券商app架构 - 解析券商应用程序的构建与设计