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我的操作，SSH连接上去后：
jackxiangsmato-iPad:/private/var/mobile/Media root# mv Downloads/* download_bak/. jackxiangsmato-iPad:/private/var/mobile/Media/Downloads root# reboot
将download文件夹里的文件manifest.plist删除，重启即可

默认上传在这儿：
./private/var/mobile/Applications/80D2F546-BEDA-4076-8744-C25C22C0200C/Documents/
天天动听：
./private/var/mobile/Applications/C7D04AFC-3831-4B7F-83C4-D88AB0185C51/Documents/

QQMusicPad先放这儿:
/private/var/mobile/Applications/DB55E674-3398-4E0F-B562-7BE03857B9F3/Documents

重新建立一个目录，做软链接，防止删除天天动听一块删除了歌曲：
全放这儿：/private/var/mobile/Media/Music/HighqualityMusic
mv /private/var/mobile/Applications/DB55E674-3398-4E0F-B562-7BE03857B9F3/Documents/* /private/var/mobile/Media/Music/HighqualityMusic/.
再软链接：
rm -Rf /private/var/mobile/Applications/C7D04AFC-3831-4B7F-83C4-D88AB0185C51/Documents/
ln -s /private/var/mobile/Media/Music/HighqualityMusic   /private/var/mobile/Applications/C7D04AFC-3831-4B7F-83C4-D88AB0185C51/Documents




首先安装一个hostname命令测试一下：
zhouzhoumato-iPad:~ root# apt-get install hostname
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting inetutils instead of hostname
The following NEW packages will be installed:
inetutils
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 0B/212kB of archives.
After this operation, 889kB of additional disk space will be used.
Selecting previously deselected package inetutils.
(Reading database ...
dpkg: serious warning: files list file for package `com.chronic-dev.greenpois0n.corona' missing, assuming package has no files currently installed.
2261 files and directories currently installed.)
Unpacking inetutils (from .../inetutils_1.6-8_iphoneos-arm.deb) ...
Setting up inetutils (1.6-8) ...
zhouzhoumato-iPad:~ root#

安装ping命令：
zhouzhoumato-iPad:~ root# apt-get install ping
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting inetutils instead of ping
The following NEW packages will be installed:
inetutils
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 0B/212kB of archives.
After this operation, 889kB of additional disk space will be used.
Selecting previously deselected package inetutils.
(Reading database ...
dpkg: serious warning: files list file for package `com.chronic-dev.greenpois0n.corona' missing, assuming package has no files currently installed.
2261 files and directories currently installed.)
Unpacking inetutils (from .../inetutils_1.6-8_iphoneos-arm.deb) ...
Setting up inetutils (1.6-8) ...

测试ping命令：
zhouzhoumato-iPad:~ root# ping
ping: missing host operand
Try `ping --help' or `ping --usage' for more information.
zhouzhoumato-iPad:~ root#
说明命令已经安装成功了。

使用ping命令测试网络：
zhouzhoumato-iPad:~ root# ping www.baidu.com
PING www.a.shifen.com (119.75.218.77): 56 data bytes
64 bytes from 119.75.218.77: icmp_seq=0 ttl=52 time=31.919 ms
64 bytes from 119.75.218.77: icmp_seq=1 ttl=52 time=40.037 ms
^C--- www.a.shifen.com ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max/stddev = 31.919/35.978/40.037/4.059 ms
zhouzhoumato-iPad:~ root#

使用apt-get的一些操作：
所以使用apt-get去执行一些相关的安装、更新、删除软件的动作很方便。这样更新安装后iphone或ipad就可以像完整的linux系统一样工作了。
apt-get的安装： apt-get install 软件包名
apt-get的更新：apt-get update 软件包名
apt-get的删除：apt-get remove 软件包名

作者：jackxiang@向东博客 专注WEB应用 构架之美 --- 构架之美，在于尽态极妍 | 应用之美，在于药到病除
地址：http://jackxiang.com/post/5852/
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