Linux

1 Directory operations Change the access rights of a directory or a file#include int chmod (constchar//mode like 0777The file specified by the path parameter is modified to have access rights given by the mode parameter.When the Modify permission

16 online tools that are useful for Linux system administrators 08/15. 2014 1. explainshell.com command ExplanationFor Linux users to write a variety of commands and scripts every day, then you can use this site tool to see how the

SSH protocolSSH English full name secure Sshell is a secure protocol that is also used to remotely log in.SSH compared to Telenet, with higher security, using Telent remote login to a host, there are the following two hidden dangers:1, the user

St_atimeTime Whenfile data is last accessed. Changedby theFollowing Functions:creat (), Mknod (), pipe (),Utime (2), Andread (2).St_mtimeTime Whendata was last modified. Changed bythe fol-Lowing functions:creat (), Mknod (), pipe (), utime

What is CoredumpTypically, COREDMP includes memory, register status, stack pointers, memory management information, etc. when the program executes. Can be understood to store the current state of the program's work as a file. Many programs and

The MV command is the abbreviation for move, which can be used to move files or rename files (rename), which is a common command under Linux, often used to back up files or directories.1. Command format:MV [option] source file or directory

IntroductionAwk is a powerful text analysis tool, with the search for grep and the editing of SED, which is especially powerful when it comes to analyzing data and generating reports. To put it simply, awk reads the file line-by-row, using spaces as

Gedit/etc/bashrcThe default special symbolic meaning in the shell environment:\d: Represents the date, formatted as weekday month date, for example: "Sun Sep"\h: The full host name. For example: My machine name is: Redhat.linux, then this name is Fc4

6.1/ETC/PASSWD fileLinux recognizes user's file/etc/passwd when user logs on/ETC/PASSWD consists of 7 fields:Login name (no more than 32 bits, no more than 8 bits after using NIS system)Encrypted password or password placeholders (most are actually

The following folder "1" on the desktop is shared as a shared folder to the Linux system in the virtual machineAdd a folder from a Windows host to a virtual machine in WMwareIn this case, the Linux system has a corresponding folder 1.You can now

Linux netstat command details, netstat command detailsIntroduction The Netstat command is used to display various network-related information, such as network connection, route table, Interface Statistics, masquerade connection, and Multicast member

Test the hard disk read/write speed in linux. After buying an ssd hard disk, I want to compare it with an ordinary mechanical disk. Because the desktop is installed with the ubuntu system, I just want to use the linux Command for a simple test. The

CentOS6 uses the ifconfig command without ipv4 address _ solution, centos6ifconfigProblem: Check CentOS6.0 in VMware with the ifconfig command. No ipv4 address is found!   Solution: Step 1: Change the network connection mode from bridging to NAT

Mount ntfs format disk to ntfs-3g under CentOS 1. Download ntsf-3g: Http://www.tuxera.com/community/ntfs-3g-download/ 2. Command: "cd ~ /Downloads ", enter the Downloads folder, I downloaded: ntfs-3g_ntfsprogs-2014.2.15.tgz 3. Command: "tar-zxvf

Install SNMP in CentOS 1. Make sure that the snmp service is installed on the Linux host. Rpm-qa | grep snmp Net-snmp-libs-5.1.2-11.EL4.7Net-snmp-5.1.2-11.EL4.7 If not, find the snmp rpm package on the Linux installation disk for installation, or

Common linux Network Programming header files, linux Network Programming Sys/types. h: Data Type Definition Sys/socket. h: Provides socket functions and data structures. Netinet/in. h: defines the data structure sockaddr_in Arpa/inet. h: Provides IP

Linux terminal prompts Information Format modification/etc/bashrc Gedit/etc/bashrc The default special symbols in the shell environment mean:\ D: represents the date, in the format of weekday month date, for example: "Sun Sep 18"\ H: complete host

Test data of PostgreSQL running on FreeBSD and Linux This afternoon I wanted to test DragonFly dports. I suddenly wondered why I didn't compare the performance difference between PostgreSQL in BSD and Linux. For this reason, I set some standards to

Ncdu-ncurses library-based disk usage Analyzer Ncdu (NCurses Disk Usage) is an interface based on the du command of the Ncurses library. It provides a quick and easy-to-use interface through the well-known du command. It displays the percentage of

Mount the partition where FreeBSD is located in Linux A problem occurs when Gnome is installed on FreeBSD. As a result, the system cannot enter--. Therefore, you cannot download a livecd, mount the shard where FreeBSD is located, and modify the