Linux

First introduce mutt This software, it is a text-based interface of the mail client, very small, but powerful, you can use it to read and write, reply to save and delete your mail, can be in the Linux command line mode to send and receive mail

Symbols to keep in mind: >2>>2>&1 6.1 Move the/data to the/root directory#move MV[Email protected] ~]# mv/data//root/[Email protected] ~]# ls-l/dataLs:cannot access/data:no such file or directory[Email protected] ~]# ls-l/root/Total 44-

In general, the newly installed SUSE Linux system can be logged on by default using SSH2, but cannot be logged in with SSH password. (At present, I am exposed to the SUSE10, suse11,suse12 system has just installed is not support SSH password

DHCP:D ynamic host config Protocol Dynamic Host Configuration Protocol works with UDP protocolPort:DHCP SERVER:UDP67DHCP client:udp68To formally install the DHCP service:Yum Install DHCP dhcp-devel-y, then modify DHCPThe contents of

Installing MongoDB operating instructions in LinuxMongoDB Configuration Version Note: This example takes the 64-bit mongdb as an example because the red Hat is installed on the machine. 64-bit operating system The following version is used:

Brief introductionThe use of zip, rar, and Tar is described in the compression/decompression tools commonly used on Linux.File packaging and compressionThe compressed package file format on Linux, in addition to the most common Windows *.zip, *.rar,.

Original: 51135623When we use Yum to install software, we often find that our Yum source does not have the software, need to go to wget, and then Configure,make,make install, too frustrating.In fact, CentOS also has a source called EPEL (Extra

(1) Documents:R: Readable, you can use similar commands such as cat to view the contents of the file;W: writable, can edit or delete this file;X: Executable, exacutable, can be at the command prompt as a command to submit to the kernel to run;(2)

Basically Linux's Orthodox file system is EXT2, and the information in this filesystem is mainly:Superblock: Record The overall information of this filesystem, including the total amount of inode/block, the amount of usage, the amount of surplus,

Man CD---cannot be queried, so it prompts Bash's built-in commands. Alias BG bind break builtin Caller CD command Compgen complete compopt continue declare dirs disown echo enable eval exec Exit export false FC FG Getopts hash help history jobs

Network timeout Detection (1)Set the properties of the socket So_rcvtimeoReference code:struct Timeval TV;TV.. tv_sec=5;//Set 5s timetv.tv_usec=0;SetSockOpt (SOCKFD,SOL_SOCKET,SO_RCVTIMEO,&TV,SIZEOF (TV));//Set Receive timeoutRecv/recvfromNetwork

Vmstat is an abbreviation for virtual meomory Statistics (dummy memory statistics) that monitors the operating system's virtual memory, processes, and CPU activity. is to make a statistical analysis of the overall situation of the system, and the

The Linux System ping command is a common network command that is typically used to test connectivity to the target host Based on IMCP protocolCommon Command Parameters-Q does not display information for any of the transmittal packets, only the last

One, Linux user groupEach process runs in a given user environment, and the users and the processes they run and the files they own belong to a collection of groups. Group membership allows system administrators to effectively manage users with

Lao Mo finally began to learn the order.First, redirectBefore old Mo said the problem of over-orientation, the data stream sent to stdout was forwarded to the file.cat /etc/os-release > 1.txtSend the results to 1.txt, but note that if the file

Directory VMware replicated intact Linux directory after NIC operation Modify/etc/udev/rules.d/70-persistent-net.rules Modifying the network card configuration file Restart view VMware replicated intact

Files outside the root directory in Linux to be accessed, you need to "associate" to a directory under the root directory to implement, this association is "mount", this directory is "mount point", the process of releasing the secondary association

A hodgepodge of Linux common service commands# MV Sxyc_tintin/jiake//Modify directory Name/file name# apt Install lrzsz//install LRZSZ support upload downloadThe SZ and RZ commands require server support, and if prompted without a command, you can

The emergency tools under LinuxUnder Linux, the emergency point of view is nothing more than that, one is to see the performance (downtime, high CPU, high memory, high IO, high network communication), two look at the connection, three look at the

The role of mounting Windows shared files:In real life, many files placed on Windows, and then run on Linux, mount Windows shared Folders, is the simplest way to quickly read files on Windows. For example, Windows download Linux Software