To set the default application for a specific file type, locate a file of that type in the file manager, right-click it, and select Properties.
Click the Open With tab and select the application you want to use for that file type. Use the Set as default button to make the application the default application.
方法:
1首先，打开iPhone上的浏览器，Safari浏览器或者其他下载的浏览器
2打开后，在地址栏输入【ipsw.me】
3向下找到【select a device】
4点击后面的倒三角，选择设备
5选择好设备后，选择select iOS version，可以看到iOS9.1的背景是绿色的，说明当前只能刷iOS9.1版本的固件，其他背景为红色的都无法更新
6这个网站不仅可以在iPhone上打开，在电脑上也可以打开
如何查看中心号码
在“拨号键盘”中输入“*#5005*7672#”，点击“呼叫”，就可以看到iPhone4设置的短信中心号码
如何设置短信中心号码
在“拨号键盘”中输入“*5005*7672*短信中心号码#”，正确输入之后，点击“呼叫”，即可完成对短信中心号码的设置
各个地区的短信中心号码是不一样的，可以打当地的客服电话进行咨询，中心号码的前面都有+号的，在拨号界面长按0就可以打出+号了
Calibre is a free and open source ebook manager.
Although Calibre is probably better known for its desktop client, it can also act as a powerful server, allowing you to access your ebooks from anywhere in the world (or share your collection with friends). Keeping your ebooks on a server is great, as you aren’t reliant on having the same reading device with you whenever you want to read. And if you go traveling, you don’t need to worry about taking your ebook collection with you! Continue reading How To Create a Calibre Ebook Server on Ubuntu
按下 Ctrl + Alt + t 键盘组合键调出终端，在终端中输入以下命令：
gsettings set com.canonical.Unity.Launcher launcher-position Bottom
按下回车。 Continue reading 移动 Ubuntu16.04 桌面左侧的启动器到屏幕底部
sudo apt-get install gedit-plugins
启动插件：Draw Spaces
给默认的hr改成我们需要的颜色时，需要将它的高度设一个值，使用背景色，并将border设为没有。
如：<hr style=”background-color:black;height:1px;border:none;”>
filesystem check system disk OK.disable the addtional disk in /etc/fstab using #
login the system run fsck /dev/sda3, fix the problem manually
Information about TPM https://wiki.archlinux.org/index.php/TPM
If you not need TPM, just
echo blacklist tpm_tis > /etc/modprobe.d/tpm_tis.conf (need root)
It worked on my computer. The error gone. Continue reading tpm_tis: A TPM error (6) occurred attempting to read a pcr value