在 Ubuntu 中，默认/bin/sh指向./bin/dash
我想/bin/bash用作我的系统范围的外壳程序/bin/sh。做这个的最好方式是什么？
Google Chrome 在最近的apt-get upgrade. 我无法弄清楚我遗漏了什么，并且谷歌没有为这些错误提供很多结果：
$ google-chrome
[1:1:0518/085616:ERROR:image_metadata_extractor.cc(111)] Couldn't load libexif.
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "adwaita",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "adwaita",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
[5807:5807:0518/085616:ERROR:browser_main_loop.cc(199)] GTK theme error: Unable to locate theme engine in module_path: "pixmap",
Aborted (core dumped)
$ google-chrome --version
Google Chrome 42.0.2311.152
升级前，Chrome 在这台机器上运行良好。