命令(输入m 获取帮助):m # m是获取帮助 命令操作 a toggle a bootable flag b edit bsd disklabel c toggle the dos compatibility flag d delete a partition g create a new empty GPT partition table G create an IRIX (SGI) partition table l list known partition types m print this menu n add...
VFS(Virtual Filesystem Switch)称为虚拟文件系统或虚拟文件系统转换,是一个内核软件层,在具体的文件系统之上抽象的一层,用来处理与Posix文件系统相关的所有调用,表现为能够给各种文件系统提供一个通用的接口,使上层的应用程序能够使用通用的接口访问不同文件系统,同时也为不同文件系统的通信提供了媒介。 VFS并不是一种...
a toggle a bootable flagb edit bsd disklabelc toggle the dos compatibility flagd delete a partitionl list known partition typesm print this menun add a new partitiono create a new empty DOS partition tablep print the partition tableq quit without saving changess create a new empty Sun disk...
b back up GPT data to a file c change a partition's name d delete a partition i show detailed information on a partition l list known partition types n add a new partition o create a new empty GUID partition table (GPT) p print the partition table q quit without saving changes r rec...
[root@www~]#df-h/etcFilesystemSizeUsedAvailUse%Mountedon/dev/hdc29.5G3.7G5.4G41%/ du Linux du 命令也是查看使用空间的,但是与 df 命令不同的是 Linux du 命令是对文件和目录磁盘使用的空间的查看,还是和df命令有一些区别的,这里介绍 Linux du 命令。
[root@www ~]# df -h /etcFilesystem Size Used Avail Use% Mountedon/dev/hdc29.5G3.7G5.4G41% / du Linux du 命令也是查看使用空间的,但是与 df 命令不同的是 Linux du 命令是对文件和目录磁盘使用的空间的查看,还是和df命令有一些区别的,这里介绍 Linux du 命令。
file_operations struct file_operations { struct module *owner; loff_t (*llseek) (struct file *, loff_t, int); ssize_t (*read) (struct file *, char __user *, size_t, loff_t *); ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *); ssize_t (*aio...
empty_zero_page = virt_to_page(zero_page); flush_dcache_page(empty_zero_page); } 图62. ARM内存主页表初始化 paging_init依次完成了以下工作: 调用prepare_page_table初始化虚拟地址[0, PAGE_OFFSET]和[mi->bank[0].start + mi->bank[0].size, VMALLOC_END]所对应的主页表项,所有表项均初始化...
void create_empty_buffers(struct page *page, unsigned long blocksize, unsigned long b_state) { struct buffer_head *bh, *head, *tail; head = alloc_page_buffers(page, blocksize, 1); bh = head; /*遍历所有缓冲头,设置其状态,并建立一个环形链表*/ ...
For example, you can create a file with two lines of text using the following single command: printf'Some text\nSome more text'> filename.txt fallocate Fallocate allows you to create a file in Linux with a specific size. It's mainly useful for testing purposes, like to gauge your hard ...