Shell

> Name >! Name > & Name > &! Name The file Name Is used as standard output. If the file does not Exist then it is created; if the file exists, it is truncated, Its previous contents being lost. If the shell

The special folder name is used to index the set to retrieve the required special folders. The following special folders are listed in the document:

1. mv 1) mV-move (rename) files MV [Option] source dest MV [Option]... source... directory Rename source to DEST, or move source (s) to directory. 2) Options ①-F, do not prompt before Overwriting ②-I, prompt before Overwrite ③-N, -- no-

1. The priority ranges from-20 to 19. The higher the priority, the lower the priority. 2. Nice can specify a modest (priority) Increment value for the process when creating a process, the priority value of a process is the sum of the shell

1. Description Split [-BL] File prefix 2. Option Parameters: -B: the size of the file to be split. The unit can be added, for example, B, K, and M; -L: split by the number of rows. Prefix: indicates the meaning of the prefix. It can be

1. Description DD-print shared library Dependencies LDD [Option]... file... 2. Option -U print unused direct dependencies. (Since glibc 2.3.4 .) -D perform relocations and report any missing objects (ELF only ). -R perform relocations for

It is simple and powerful to share shell usage and scripts that you may not know! Before reading the following sections, we strongly recommend that you open a shell experiment, which is not a major commodity in Shell textbooks :) ! $! $ Is

Microsoft Windows XP [version 5.1.2600](C) Copyright 1985-2001 Microsoft Corp. D: \ Documents ents and Settings \ Administrator> % comspec %/C nbtstat-A 192.168.1.22> C: Mac.txt D: \ Documents ents and Settings \ Administrator> % comspec %/C

0. Introduction WriteProgramCommand line parameters are often processed. This article describes the command line Processing Method in bash. Options and parameters: For example, the following command line:./Test. Sh-F config.

Use shellSYslog log file write information ApplicationProgramUse S The log file (in the/var/log directory) That yslog sends messages to the Linux system ). S Ysklogd provides two System Tools : One is System Log Record , The other is kernel

Echo $ shell: display the default shell Echo $ bash_version: displays the bash shell version. Apt-Get update: Update suite Indexes Apt-Get install Bash: Update bash Host Logon method: Ssh-l account host name or IP address Example:

Category:ProgramWshshell objectProgid wscript. ShellFile Name wshom. ocxCLSID F935DC22-1CF0-11d0-ADB9-00C04FD58A0BIID F935DC21-1CF0-11d0-ADB9-00C04FD58A0B The following table describes the properties related to the wshshell object.Attribute

There are three common file descriptors in shell programming:0: stdin, standard input. The default value is the keyboard input.1: stdout, standard output. The default value is screen output.2: stderr, standard error output. The default value is

ShellProgramIs a common file containing Unix commands. the permissions of this file should be readable and executable. Like a common executable program, you can either specify a full path name or put it in the path list specified by the PATH

Special characters # Note Comment # comment In the middle of the quotation mark and # representation # itself Echo $ {path # * :}# parameter replacement, not a comment Echo $(2 #101011) # Number conversion, not a comment ; Separator Command

Job Management For example, after logging on to bash, we want to copy files, search data, compile data, and write vi programs! Of course, we can log on to the terminal environment of the six text interfaces again. However, can we achieve this in a

I. Methods Copy codeThe Code is as follows :/** * Execute a shell command and return the string value. * * @ Param cmd * An array composed of command names and parameters (for example, {"/system/bin/cat", "/proc/version "}) * @ Param workdirectory *

1. Write the backup and clear the old log Shell script: Copy codeThe Code is as follows :#! /Bin/sh # Backup eoslog # Author rhao # Date 2008-12-27 # Define Environment VariablesEOS_HOME =/home/eosSAS_HOME =/home/eos/SAS # Test primary and

In linux, the/proc/$ PID/status file provides the usage of the Process resources (memory, stack, semaphore, sub-parent process, although linux provides a lot of memory viewing commands, they all look at the overall usage and cannot view the memory

Script Writing Skills Script File Name naming rules The characters in the file name include Letters, numbers, ".", "_", and "-". Note: The script file name cannot start with a number. Name the script file name. Try to use the abbreviations of