clear command hooks

How to clear User Logon records and command history using CentOSClear the system logon success record [root @ localhost root] # echo>/var/log/wtmp // garbled characters when this file is opened by default, ip address and other information can be found [root @ localhost root] # last // user logon information cannot be found at this timeClear [root @ localhost root] # echo>/var/log/btmp // garbled characters

Whether for the sake of computer performance or data security considerations, we often need to clear the browser's history, including browser caching, recorded cookies, history, passwords, and so on. Generally speaking, in IE7 (Internet Explorer 7), the operation is done through the delete browsing history in the General tab of Internet Options, but objectively speaking, such an operation takes several steps and is often clearly inefficient. If you n

Tags: test results Catherine Database operation database System operating systemProduction environment:Operating system: CentOS6.6Database system: MySQL 5.5.41-cll-lveSecure terminal emulation software (telnet tool): Xshell 5Problem: In the learning and practice operation, found fullscreen fast, view inconvenient, so want to solve this problem,But in this environment to clear the screen, or different, it is often difficult to think of the following wa

the CMOS password in DOS. An editor in DOS, which is DEBUG, is a very useful tool to start by typing a command at a DOS command prompt: Debug, and then go to the debug editing interface. After you enter a command in the command state, restart the computer to clear the CMO

Today's command parameters are relatively simple, so I want to learn more. The clear command is used to clear the screen. Ctrl + L has the same effect. The pwd (print working directory) command displays the current directory (absolute path ). The touch

Clear the records of successful login to the system, that is, the records seen by the last command. [Root @ localhost root] # echo>/var/log/wtmp this file is garbled by default when it is opened, and the IP address and other information can be seen in it. [Root @ localhost root] # echo>/var/log/wtmp [Root @ localhost root] # Last The user logon information is invisible.

Code # of the clear screen and cursor reset command Create_log.sh #! /Bin/bashwhiletruedodategt;gt;log.txtsleep1done;to manually append the content Print_log.sh to log.txt #! /Bin/bashwhiletrue... clear screen and cursor reset command Create_log.sh code #! /Bin/bash while true do date> log.txt sleep 1 done; append the

[Root @ localhost root] # echo>/var/log/wtmp # garbled characters are cleared when the file is opened by default, ip address and other information can be found [root @ localhost root] # last # user logon information cannot be found at this time to clear records of system logon failures [root @ localhost root] # echo>/var/log /btmp # garbled characters when this file is opened by default, you can find the logon Failure Information [root @ localhost roo

I have compiled a detailed description of the apt-GET command in Ubuntu Linux and shared it with you.Common apt command parameters:Apt-cache search packageApt-Cache show package obtains package information, such as description, size, and version.Sudo apt-Get install package installation packageSudo apt-Get install package--reinstall re-installation packageSudo apt-get-F install fix and install "-F = -- fix-

Label: Ar file problems C r how to install software in LinuxRun sudo apt-Get install on Ubuntu or other Linux systems.Observe the content output by the command line and find that some installation packages will be downloaded from the Internet. Some people may have problems. Where are the downloaded files? Will the installation process increase, these downloaded installation packages consume hard disk space.First, the downloaded installation package is

I'll give you two ways to introduce it to everyone.1 If you have enough space after using sudo apt-get clean, that's great.2 Not enough, still hint space is insufficient. At this point, it's time to uninstall the expired kernel in boot.Here are the steps:1 Viewing the files in boot2 View the kernel version we are using3 uninstalling the kernel with a command I want to uninstall 4.2.0-16 This version of the kernel4 effectsUbuntu Basic upgrade has been