Linux

visudo 编辑 sudoers 文件Syntax format: visudo "option" su [option]Attention: Visudo command and subsequent options and user names, there must be at least one space between each element The Visudo command is specifically used to edit

First, delete special characters files/foldersLs-i the inode of the file, and then use the Find command to delete[localhost] ls -ilrt100985 -rw-r--r-- 1 TBCs users 0 One: -mxv9.log100985 of the first column is the inode of the file,

First, && indicates that the task executes in the background, such as to run Redis-server in the background, such asSecond, &&&& indicates that the previous command executed successfully before executing the latter command, such asEcho ' Me ' &&

-A input-m state--state new-m tcp-p tcp-s dizhi--dport 6379-j ACCEPT-A input-j REJECT--reject-with icmp-host-prohibited-A forward-j REJECT--reject-with icmp-host-prohibitedCOMMITIptables-a input-p TCP--dport 22-j ACCEPTCentOS

Linux utility shortcut keys DaquanCtrl + u delete something before the cursorCtrl + k Delete something after the cursorCtrl + Y Paste Ctrl + U/ctrl + K charactersCtrl + C

The command is followed by a # indicating that it is a super administratorThe command is followed by a $ representation that is an ordinary userTTY to see which terminal is located[[email protected] ~]# cat/etc/shells View the shell installed on the

Linux Network configuration~]# ifconfig View IP~]# ifup eth0 Boot nic~]# cd/etc/sysconfig/network-scripts/==> nic configuration file under/etc/sysconfig/network-scripts~]# ls-l ==> List The contents of the folder, find Ifcfg-ens33~]# vi ifcfg-ens33 =

The results of the first week of study1. von Neumann system2. Terminal type:Virtual Terminal: ctrl+alt+f2~f6/dev/tty/2~6Graphical Terminal CTL+ALT+F2~F6/DEV/TTY/13.cat/etc/shells viewing the current system-installed shellEcho $SHELL See what SHELL

Hard drives are an indispensable storage device in today's it world, requiring hard drives, whether it's a home PC, workstation or server. With the development of technology, hard disk technology is also increasing, interface diversification

The Three Musketeers of Linux, respectively, are Awk/sed/grep, which is an essential common command for operation and maintenance personnel.One: awk takes column awk ' {print $1 ' "old.txt} 'Awk/aaa/old.txt II: SED takes the first and second

What is Systemctl? Systemctl is the main tool in RHEL7 's service management tool, which incorporates the functionality of the previous services and Chkconfig. You can use it to enable/disable the service either permanently or only in the current

1, regular mode, filter out users using/bin/bash in/etc/passwd[Email protected]:~/linux/awk$awk-V fs=":" 'begin{printf "%-10s%-10s%-10s\n", "User name", "User ID", "bash"}/\/bin\/bash$/{printf "%-10s\t%-10s\t%-10s\n", $1,$3, $NF }'/etc/passwdUser

The main categories of firewalls are:1, NetFilter2. TCP Wrappers3. ProxyPacket filtering software for Linux: iptablesThe order of the rules is very importantThree sheets: Filter, NAT, mangleFive chains: input, output, forward, prerouting,

Again, the awk basic syntax format:awk [Options] ' Pattern {Action} ' file1 file2The previous article discussed two types of pattern (BEGIN, END), and this article explores other pattern (pattern) usages again.What is the pattern? A pattern is a

Common Tools for file management: CP, MV and RMCopy command: CP (copy)Use format: cp [OPTION]... [-T] SOURCE DEST cp [OPTION]... SOURCE... DIRECTORY cp [OPTION]... -t

2.1 First write script and number of concurrent users in Windows, enter CMD in the bin directory2.2 Enter the following command in the following directoryJmeter-n-T Test1.jmx-l xhy.jtl-N No graphical interface-t specifies which script to run, and-T

As we said before, Awk is a very powerful text formatting tool, and the printf action in this article is often used to format text. Use the same way as the C language printf.1,printf default does not return to line feeds[Email

Linux driver can be directly compiled into the kernel, can also be loaded in the form of modules, the former is more complex, this article in the form of modules loaded!VI helloi_driver.c#include #include #include static int __init hello_init (void){

1. IntroductionUsing the coding to manage the project, the GIT version above requires 1.8.0, and many yum sources automatically install GIT version 1.7, so you need to master the manual compilation and installation of the Git method.2. Install git

The job requires SVN to be migrated from win to Linux, taking a few days to read the data, and simply record it:The SVN environment for the company is Windows Server 2003, VISUALSVN 2.1. Version 51.dump out SVN data and upload to LinuxAt