xxd command

filename file ZZ-If the file is not changed, do not save leave, if the file has been changed, then save and leave Hexadecimal view Text class capacity :%!xxd--View current file by hexadecimal :%!xxd-r--Return to normal mode from hexadecimal plug-in shortcut keysTag shortcut keys : Tag TagName--Jump to TagName tab : Stag TagName--New window display

chattr commandCommand function: Change file properties.Command syntax: chattr [parameter] [+/-/=This directive alters the properties of files or directories stored on ext2, ext3, Ext4, XFS, Ubifs, ReiserFS, JFS file systems, which have the following 8 modes: A: Make the file or directory available for additional use only. B: Do not update the last access time of the file or directory. C: Compress the file or directory and store it. D: Exclude files or directories from dumpin

In general, Bash is case-sensitive to commands, and can display the previous history command when you press the "Up" button. However, this is not very convenient, the following configuration, you can let bash ignore the case, and can be based on the input command header press "Up" key to display the history of the command, such as: input vim, and then press "Up"

The DF command is used to view the disk usage of the Linux file system, and to see how much space is currently occupied by the disk and how much space is left.Several of the commonly used commands areCommand 1 DF The default display size is in kilobytes, you can use the parameter-K 1024-byte units,-M 1024*1024 bytes,-I display innode information,-H displays the data in the appropriate units,-H is the same as the-H effect, but-H is in 1000 as a unit,-

1. Color command　Save the current color settings---can be quickly restored later2. Copy commandExample: BGA fan outActivation command--tick--Remove tick--select--right-rotate--each rotation 90 degrees　　Matrix mode replicationReproduction of the form of a projectile3. Delete commandOnly check the corresponding property (find) When executing this command to prevent

Linux Command (1): cd command, linux Command cd 1. Role: Change the working directory; 2. Format: Cd [path] The path is the working directory to be changed. It can be a relative path or an absolute path. 3. Use instances: [Root @ www uclinux] # cd/home/yourname/ 4. Instructions for use: This command changes the c

conversion work at this point. --version Displays version information. Mans :NAME : Command name and function brief descriptionSynopsis : Usage notes, including available optionsDESCRIPTION : A detailed description of the command function, which may include the meaning of each optionOPTIONS : Explains the meaning of each optionFILES : The configuration file associated with this commandBUGS :EXAMPLES : Usi

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 on the attributes of the file , such as file name, file size, owner, owning group, whether it is empty, access time, modification time, etc.(2) grep is a search

The chmod command is a command used to change file or folder permissionsUse the method for chmod [who] [+ |-| =] [mode] File nameThe mode method is as follows:The numbers correspond to characters as follows:R=4,w=2,x=1To rwx the property, 4+2+1=7To rw-the attribute then 4+2=6;To r-x the property, 4+1=7.The WHO permission groups have the following relationships:u: The current user of the directory or fileG:

$ (Solutionpath) solution (defined as drive + path + base name + file extension).The base name of the $ (solutionname) solution.The file name of the $ (solutionfilename) solution (defined as base name + file extension).The file name extension of the $ (solutionext) solution. It includes "." In front of the file name extension.$ (TargetDir) The directory that generated the primary output file (defined as drive + path). It includes the trailing backslash "\".$ (TargetPath) The absolute path name

Like-CP and-classpath, it is the path to the other classes that the specified class runs on, usually the class library, the jar package, and the full path to the jar package, the semicolon ";" JAVA-CP on the window. Myclass.jar Packname.mainclassnameThe jar file in the classpath can use wildcards, and if it is multiple jar files, it should be listed one by one, and in a sense the jar file is the path.To specify a specific storage path for each jar file, multiple wildcard characters can be used f

Tip:1. Use the shortcut key (Ctrl + F), enter the command you want to know, and press enter to quickly find the command;2. Some commands have not yet been updated. In the future, we will take the time to update them. Please pay attention to the Yunqi community network.Linux Commands1. File managementCatChattrChgrpChmodChownCksumCmpDiffDiffstatFileFindGitGitviewIndentCutLnLessLocateLsattrMattribMcMdelMdirMkt

Linux Command sharing: lsof command, linux Command sharing lsof Lsof (listopenfiles) is a tool used to list open files in the current system. In linux, everything exists in the form of a file. Through a file, you can not only access common data, but also access network connections and hardware. Therefore, for example, the transmission control protocol (TCP) and

PHP command line command instructions, php command line instructions. PHP command line Command Guide. php command line guide when a user opens the php page, the server executes the PHP command