little leaps learning system

, item: "Medium box", Qty:30 } ], "majority", wtimeout:100 } ); } Catch (e) { print (e); } Return value: If The primary and at least one secondary acknowledge each write operation within { true, "Insertedids" : [ ObjectId ("562a94d381cb9f1cd6eb0e1a") ), ObjectId ("562a94d381cb9f1cd6eb0e1b"), ObjectId ("562a94d381cb9f1cd6eb0e1c") ] } Timeout returned: Writeconcernerror ({ "code": +, "Errinfo" : { "wtimeout": true }, "ErrMsg"

1:unix file Type-3 typesNormal files (regular files): Text files (plain text, scripts, source programs, configuration files, HTML, etc.), binary files (multimedia files, databases, etc.)Directories: for organizing filesPseudo-file: does not store data for the purpose of providing a service. Divided into three kinds:Special files: Device drivers, file representations of physical devices (keyboards, monitors, etc.)Named pipes: Directing the output of one program to the input of another programProc

逻辑卷lv0的快照lv0-backupmount /dev/vg0/lv0-backup /mnt ##挂载The size of the snapshot determines the size of the operation space, and when the write content is larger than the snapshot size, the snap is corrupted.rm -fr /mnt/* ##修改数据（假设误操作删除了设备所有文件）Reset:umont /mnt ##卸载快照 lvremove /dev/vg0/lv0-backup ##删除损坏的快照文件lvcreate -L 40M -n lv0-backup -s /dev/vg0/lv0 ##重新创建快照lv0-backupmount /dev/vg0/lv0-baackup /mnt ##重新挂载快照4. Removal of Logical Volume LVM(1)先删除快照：lvremove /dev/vg0/lv0-kuaizh

status, listening portnetstat -lnp-l lists only the service states that are in Listen (listening)-N refuses to display aliases, showing all numbers converted to numbers-P Displays the program name that establishes the associated linkNETSTAT-LNP |grep + port number or service nameYou can see if a service is started, or you can view the process with PSnetstat -ltnpView Only TCPnetstat -lunpView Only UDPNetstat-an List all port statesIf the server you are administering is a server that provides We

that a machine can directly connect to the B machine's 22 port.Take my own environment for example, a machine for windos host, IP for 192.168.226.1b Machine for VMware inside LINUX1, there are two network cards, ENS33 IP for 192.168.226.129ENS37 to 192.168.100.1C Machine for virtual machine linux2, IP for 192.168.100.100Now how to configure can let the host SSH connection linux2?1. Route forwarding is still turned onecho "1" >/proc/sys/net/ipv4/ip_forward2 Configuring routing RulesA on the exec

Let's review the previous section:1. Set Password command passwd2. User Information Modification Command usermod3. User Delete command Userdel4. Job: Modify User1 User ID 505, home directory to admin, user Group is admin, finally delete user1 userUsermod–u 505–d/home/admin–g Admin User1Userdel user1In this section, we continue to talk about user management-related commands1. Add User group GroupaddThe use of this command is simple groupadd groupnameAfter the addition is complete, you can view th

initiated from the RING3 layer, it is interesting that the RING0 layer will recursively enter kifastcallentry if the ZW function is called, and then call the NT function.This is the biggest difference between the kernel ZW function and the NT function! (The ZW function in Ntdll does not differ from the NT function)So it is tedious to return kifastcallentry, mainly because the stack that originated the system call is determined by the previous pattern

UML, the requirement must be clarified first. Through analysis, the functional requirements of this workshop MES system mainly include the following aspects:(1) Material flow management. Manage a variety of production material resources to prepare, record and manage the distribution and handover process of materials before starting work.(2) Allocation of production units. To manage the process of production units according to work order, order, batch

(see View to hidden files)-L is displayed in long format with only one display per line-I displays the file index node number (inode). An index node represents a file-T from near sort display by file modification time-D displays only the directory name, not the list of contents under the directory. Displays the symbolic link file itself without displaying the list of directories it points to-H to visually display file sizes-C LS default output with no parameters, multi-column displayExample: Ls

Nachos operating system learning (1) Importing nachos source code to eclipse in windows I am afraid I don't have to think about anything like start-ups and looking for work in this time period. It is the most important to learn something honestly, so I am aiming to learn the operating system, nachos is a learning-type

First of all, I am very glad that I passed the first half of 2016 years of Information System Project management exam, his hard pay is not wasted.I work in the IT company for nearly 10 years, mainly responsible for team management, project management, 2016 decided to apply for information System Project manager, because the usual work is very busy, the exam also has a certain difficulty, in order to ensure

Agile personal content is more, now has become a system: the first self-service comprehensive self-management practice system, to help you simplify life, balanced growth, began to love learning, understand life, to act, to become a happy, balanced, efficient impact of the person.Learn –1 in the Agile personal new system