Use the John Ripper tool to try to crack a Linux password

John differs from tools such as Hdra. Hydra a blind brute force attack by attempting a username/password combination on a service daemon on an FTP server or Telnet server. However, John first needs to hash it out. So the bigger challenge for hackers

Research on the scheme of automatically cleaning up a large number of files under Linux

Regular cleaning of outdated and junk files, maintaining a reasonable space usage of the file system, is a system administrator's daily work. Simple system commands or scripts can be implemented for small to medium sized file systems, but file

Analyzing the average load concept of Linux systems

One, what is the system average load (load average)?In Linux systems, the uptime, W, top commands will have the system average load average output, then what is the system average load?The system average load is defined as the average process tree

Apache Do load Balancing configuration tutorial (Windows/linux)

Windows Apache does load balancing The first time I saw this headline I was surprised that Apache can still do load balancing? It's so powerful. After a survey found that it can, and the function is not bad. This is thanks to the Mod_proxy module.

In-depth detailed Linux soft link (symbolic link)/Hard link

0X00 What is a linked file The linked file in Linux is the equivalent of a shortcut in Windows, which can be accessed by linking files to the source files that the link points to. However, there is a certain difference between the link file under

Linux Command aliases alias usage

Command alias: Alias Alias displays all aliases defined in the current shell [Root@zabbix_agentd zabbix]# AliasAlias cp= ' Cp-i 'Alias egrep= ' Egrep--color=auto 'Alias fgrep= ' Fgrep--color=auto 'Alias grep= ' grep--color=auto 'Alias l.= ' ls-d. *

Useradd command usage in Linux

Command:Useradd Add UsersAddUser Add Userspasswd Add passwordUserMode Modify User InformationChsh Modify User ShellChage Modify Account DateCHFN Modify User InformationUserdel Delete UserGroupadd Add a groupGroupmde Modify GroupGroupdel Delete

Linux File Lookup tool find command usage

File Lookup: Operators in the operation of the operating system, to contact a large number of files, in order to avoid the embarrassment of forgetting the location of file storage, we need a file to find tools to help, the following is two files to

Example of SFTP command transfer file under Linux

SFTP is an interactive file transfer program. It is similar to FTP, but it carries on the encrypted transmission, has the higher security than the FTP. 1. Common Landing Method: Format: SFTP @ Connect via SFTP, Port is default 22, specify user .

Introduction to Linux Cluster file system and new challenges of cluster application

Introduction to Linux Cluster file systemThe cluster file system has perfected the database cluster function of Oracle RAC in many aspects. Here is a comparison of them.Typically, a cluster is just a set of servers (PCs or workstations) that run as

Linux UWSGI log rotate-day cutting logs example

Uwsgi and Nginx log are in a file name on the log, can not be rotate by day, so the volume of a single file will become larger and worse, not conducive to log backup. Nginx Method of Log segmentation The Nginx log segmentation method is studied on

Using tcpdump to realize 24-hour automatic grasping package under Linux

Install Tcpdump The code is as follows Copy Code # yum Install tcpdump There is a comment #diy in the script, which means that the next line needs to be custom modified.The scripts are placed in the home

Linux system view file and folder size for hard drive

1. DF can view the level of folder size, usage ratio, file system and its mount point, but not for the file (see only the windows of the similar C disk, D disk)Du can view the size of files and folders, more useful 2. [Ia@i5a6 ~]$ Df-h Parameter-H

An in-depth introduction to SVN configuration methods in Linux systems

One, SVN installation1. Installation package$ sudo apt-get install subversion 2. Add SVN Admin user and Subversion Group$ sudo adduser svnuser$ sudo addgroup subversion$ sudo addgroup svnuser subversion 3. Create a project directory$ sudo

Linux tar command usage detailed

tar [-cxtzjvfppn] files and directories .... Example: Example one: Package all the files in the/etc directory into a/tmp/etc.tar [Root@linux ~]# tar-cvf/tmp/etc.tar/etc [Root@linux ~]# tar-zcvf/tmp/etc.tar.gz/etc [Root@linux ~]#

Linux Create connection command ln-s Soft Connect

This is a very important command in Linux, please be familiar with it. Its function is to create a link to a file in another location, the most common parameter of this command is-s,The specific usage is: Ln-s source file Destination file.when we

One Linux command per day: exec of the Find command

Find is a very common Linux command, but what we generally find out is not just to look at it, there will be further operations, this time the role of exec is revealed.EXEC explained:The-exec parameter is followed by command, which terminates with a;

Linux Beginner Experience

The first essay, in fact, is to write homework, but the teacher's request is right, in fact, they are in the environment and the work of the industry will also be encountered in the resolution of the problem recorded, so that later to find

The Linux foundation of AWK

GNU awk:Text Processing three tools: grep, sed, awkgrep, Egrep, Fgrep: Text filtering tool; patternSed: line EditorPattern space, hold spaceawk: Report Generator, formatted text output;Awk:aho, Weinberger, Kernighan---New AWK, NawkGNU awk,

Linux Find File Lookup command with grep file Content Lookup command

Linux Find File Lookup command with grep file Content Lookup commandWhen using Linux, file lookups are often required. The commands you find are primarily find and grep. Two commands are of a district.  The Difference : (1) The Find command is based

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