awk 命令在看起来不同的文件中查找
为什么这行不通？它找到所有其他文件，但找不到这个文件。唯一的区别是它的名称中有数字。
awk -F= '$1=="Icon" {print $2}' "/usr/share/applications/hildon/dropn900.desktop"
它使用的文件..
[Desktop Entry] Version=1.0.0 Encoding=UTF-8 Name=DropN900 Comment=Python based DropBox client Exec=/opt/dropn900/dropn900.py Icon=dropn900 X-Icon-path=/usr/share/icons X-Window-Icon=dropn900 Type=Application X-Osso-Type=application/x-executable
它应该给我“dropn900”的输出，但没有。
如果我按照下面的建议进行操作..
awk -F= '$1==" Icon" {print $2}' "/usr/share/applications/hildon/fapman.desktop"
[Desktop Entry] Encoding=UTF-8 Version=1.0 Type=Application Name=Faster Application Manager Exec=fapman.launch Icon=fapman X-Osso-Type=application/x-executable X-Osso-Service=org.maemo.faster_application_manager Categories=System;
这将不会显示..
丹尼斯建议的给出了输出。
dropn900 /usr/share/icons dropn900
但我只需要“dropn900”，否则脚本将无法工作。
Why do not this work? It finds all the other files but not this one. The only difference is that it has numbers in its name.
awk -F= '$1=="Icon" {print $2}' "/usr/share/applications/hildon/dropn900.desktop"
The file it uses..
[Desktop Entry] Version=1.0.0 Encoding=UTF-8 Name=DropN900 Comment=Python based DropBox client Exec=/opt/dropn900/dropn900.py Icon=dropn900 X-Icon-path=/usr/share/icons X-Window-Icon=dropn900 Type=Application X-Osso-Type=application/x-executable
It should give me the output of "dropn900" but doesn't.
If i do as suggested below..
awk -F= '$1==" Icon" {print $2}' "/usr/share/applications/hildon/fapman.desktop"
[Desktop Entry] Encoding=UTF-8 Version=1.0 Type=Application Name=Faster Application Manager Exec=fapman.launch Icon=fapman X-Osso-Type=application/x-executable X-Osso-Service=org.maemo.faster_application_manager Categories=System;
This will not show..
The one suggested by Dennis gave the output.
dropn900 /usr/share/icons dropn900
But i need just "dropn900" or the script will not work.
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由于您使用等于而不是空格作为字段分隔符，因此
$1实际上是" Icon"带有前导空格。尝试一下您的文件，您会发现名称中包含数字的文件确实无关紧要。
Since you're using equals, not space, as the field separator,
$1is actually" Icon"with a leading space. Tryon your file, and you'll see that the file having numbers in its name is really irrelevant.
如果您的某些文件每行都有前导空格，而另一些则没有，则此正则表达式匹配可能会有所帮助：
If some of your files have leading whitespace on each line and some don't, this regex match may help: