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通常编译Java app javac appname.java执行Java app java appname(Java虚拟机)此外，Setting an Entry Point with the JAR Tool（how to run *.jar）The 'e' flag (for 'entrypoint'), introduced in JDK 6, creates or overrides the manifest's Main-Class attribute. It can be used while creating or updating a 阅读全文
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错误描述[ 36.768000] VFS: Unable to mount root fs via NFS, trying floppy.[ 36.772000] VFS: Cannot open root device "nfs" or unknown-block(2,0)[ 36.776000] Please append a correct "root=" boot option; here are the available partitions:[ 36.780000] Kernel panic - not syncing: VFS: Unab 阅读全文
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GRUB啟動時選擇fedora，按e鍵，再選擇kernel，按e鍵，在kernel /boot/vmlinuz最後面加入single,回車-按b鍵 ，内核会启动到单用户模式，等待進入命令行模式。 阅读全文