bash history

language can simply repeat a task. bash is a shell, with a friendly interface, more easy to operate, more convenient to users, command completion function: Usually when you enter a command under bash (or any other shell), you don't have to lose the command to the shell to determine the command you want to enter. bash Another way to make command input easier i

Bash:1. Command history, Command completion2, Pipeline, redirect3. Command aliases4. Command line editing5. Command line expansion6. File name Wildcard7. Variables8. Programmingcommand-line editing:Cursor Jump:CTRL + A: Skip to the beginning of the commandCtrl+e: Jump to the end of the command lineCtrl+u: Delete the cursor to the beginning of the command lineCTRL+K: Delete the cursor to the end of the comma

The Linux shell is basically bash by default, and here are some of the tips I've summed up. ${varible##*string} The string ${varible#*string after the last string is intercepted from left to right ${varible%%string* the string after the first string from left to right The string ${varible%string* after the last string from right to left intercepts the string after the first string from right to left Background Run programs () use a child shel

Living in the Bash shell, memorizing the following shortcuts will greatly improve the efficiency of your command line operations.Edit command Ctrl + A: Move to the beginning of the command Ctrl + E: Move to the end of the command line Ctrl + F: Move forward by character (right) Ctrl + B: Move back by character (left) Alt + F: Move forward by word (right) Alt + B: Move back by word (left) Ctrl + XX: Moves between the be

front of the command is ignored by the shell, which means it does not appear in the history. But this method has a premise, only if your environment variable Histcontrol set to "Ignorespace" or "Ignoreboth" will not work. In most cases, this is the default value. So, like the following command (LCTT: here [space] means to enter a blank): [Space]echo "This are a top secret" If you have previously executed the following command to set the environment v

the Bourne Shell and developed based on the GNU architecture!Before introducing the advantages of shell, let's talk about the simple history of shell: the first popular shell was developed by Steven Bourne. to commemorate it, it is called the Bourne shell, or directly referred to as sh! Later, another widely used shell was designed by Bill Joy of the University of Berkeley to be attached to the shell in the BSD Unix system. The shell syntax is a bit

1. Legal shell and/etc/shells functions shell has multiple versions, including Bourne Shell (SH), C shell, K-Shell, tcsh, etc. Normally Linux uses the Bourne Again Shell (Bash), which is the enhanced version of SH can check/etc/shells to see how many shells are available. Writing a legitimate shell to a/etc/shells file is a way for some of the system's services to check the shells that the user is able to use during the run. When the user logs in,

Bash command line historical usage Summary-Linux general technology-Linux technology and application information, the following is a detailed description. I found a useful command at work: fc, which makes today a little fun. Fc is an internal bash command used to modify commands in the command history. Man bash then se

Shell Features-- Linux has a variety of shells to use, the default for Bash,bash has the following key features. 1. Command Memory Ability Press the up and down keys on the command line to find a pre/Post input command. These commands are recorded in～/.bash_historythis file, which records all the commands that were run by the last login shell, and the commands that are currently

1. What is shell?The operating system interface. The shell can call the corresponding hardware through the kernel.2. What is Bash?Bourne again shell (BASH) is actually a version of shell.3. BASH Shell functions:1) command compilation function (command history );2) command auto-completion function (press the tab key );3

Reprinted: http://www.bsdlover.cn/html/24/n-3224.html BashInVariable1. User-Defined variablesA user-defined variable consists of letters, numbers, and underscores. the first character of the variable name cannot be a number.Like other UNIX names, variable names are case sensitive.You can assign values to variables as follows:Name = ValueWhen referencing a variable, you must add the $ symbol before it. You can assign values to each other between variables, for example:(The previous $ is a command

list, which is generally stored in the user directory. bash_history file. By default, 1000 entries are saved. you can change this value. If you type history, history will show you the first 1000 historical commands you are using and mark them, you will see a list of numbers quickly rolled out from the screen. You may not need to view all the projects in the 1000 commands. you can also add a number to list

Bash and its features:Shell: ShellGui:gnome, KDE, XFCECli:sh, CSH, ksh, bash, tcsh, zshProcess: In each process it appears that only the kernel and the current process exist on the current hostA process is a copy of a program, and a process is a program execution instanceUser working environment:Bash:#$Bash:1. Command history