how to use cron???<已解决>

[hackem]

I want use the cron command halt computer,but use " crontab -e"
I don't understand how to save the text.
Hot to save the text??

[oneleaf]

Ctrl + o 保存,Ctrl + x 退出，屏幕下面写着呢。

[hackem]

but why not is into the vim or vi?
then,press "esc" and "wq" ??

[jyq011]

因为你用的是nano，也是ubuntu默认的，你可以用update-alternatives --config editor 把默认编辑器改为vim

[hackem]

I can't change the selection....................


ning@ning-desktop:/usr/share/xmms$ update-alternatives --config editor

There are 3 alternatives which provide `editor'.

Selection Alternative
-----------------------------------------------
1 /usr/bin/vim
2 /bin/ed
*+ 3 /bin/nano

Press enter to keep the default[*], or type selection number: 1
Using `/usr/bin/vim' to provide `editor'.
update-alternatives: unable to make /etc/alternatives/editor.dpkg-tmp a symlink to /usr/bin/vim: Permission denied
ning@ning-desktop:/usr/share/xmms$


[/img]

[jyq011]

I can't change the selection....................


ning@ning-desktop:/usr/share/xmms$ update-alternatives --config editor

There are 3 alternatives which provide `editor'.

Selection Alternative
-----------------------------------------------
1 /usr/bin/vim
2 /bin/ed
*+ 3 /bin/nano

Press enter to keep the default[*], or type selection number: 1
Using `/usr/bin/vim' to provide `editor'.
update-alternatives: unable to make /etc/alternatives/editor.dpkg-tmp a symlink to /usr/bin/vim: Permission denied
ning@ning-desktop:/usr/share/xmms$


[/img]

sduo update-alternatives --config editor

[hackem]

thank you for your help