bash history

:35:48 history 3 1048 14-11-02 16:35:52 history 3shell > !headhead ~/.bash_history #1414484377cd update/#14144843772. modify the number of lines in the history record in the history configuration. shell > echo $HISTSIZE1000shell > By default, the configuration file of Line 1 is modified in/etc/profile. HISTSIZE=1000ex

There are multiple types of Shell in Linux, the most common of which are Bourne shell (SH), c shell (CSH), and Korn shell (Ksh ). Each of the three shells has its own advantages and disadvantages. The Bourne shell is the original shell used by UNIX and can be used on every UNIX. Bourne shell is excellent in shell programming, but it is inferior to several other shells in dealing with user interactions. The default shell in Linux is the Bourne again shell, which is an extension of the Bourne shel

Set bash options with built-in set and SHOPT commandsThe set command can be used to customize the shell environment, using the option "O" to turn options on or off. For example, open the options: Set-o option, close the Select item: Set +O option.For example, to open the VI Interactive command-line edit, the following: [Email protected] ~]#Set-o#查看当前设置情况Allexport offBraceexpand onEmacs onErrexit offErrtrace offFunctrace offHashall onHiste

The author of this book, Shi jingqian, is an overseas Chinese historian. The original book is in English and the translator is a Chinese PhD student. The translation is quite good. If you do not speak of it, it cannot be seen as a translation. The book is basically written in academic habits, and each section of history comes from credible historical materials. However, the authors and translators can easily read the text. The author's description o

Linux Bash severe vulnerability emergency repair solution, bash severe vulnerability Recommendation: 10-year technical masterpiece: High-Performance Linux Server build Practice II is released across the network, with a trial reading chapter and full-book instance source code download! Today, a Bash security vulnerability has been detected.

[Root @ linux ~] # History [n] [root @ linux ~] # History [-c] [root @ linux ~] # History [-raw] histfiles parameter: n: number, meaning "list of the last n commands! -C: delete all history content in the current shell.-a: add the newly added history Command to [root @ linux

under the MacFor Linux systems in the Debian class, the common Apt-get Class command can be aliasAlias update= "sudo apt-get update"Alias upgrade= "sudo apt-get upgrade | Tee ~/documents/' date +%f_%h:%m:%s '-upgrade.log "Alias dist-upgrade= "sudo apt-get dist-upgrade | Tee ~/documents/' date +%f_%h:%m:%s '-dupgrade.log "Alias remove= "sudo apt-get remove"Alias install= "sudo apt-get install"Alias purge= "sudo apt-get purge"...and add Update,upgrade,dist-upgrade to the Histignore. Histsiz

Bash concise tutorial -- variables, bash concise tutorial Variables 1. Preface Bash is a popular scripting language in * nix systems. As a scripting language, variables are the basic elements of a language. In this tutorial, we will learn how variables are represented in Bash and some syntax rules related to variables.