Document directory
- Command Format
- Change supported language
- Several simple commands
This article is my study notes on "laruence's Linux private house dish.
Command Format
Command Format: Command [-options] parameter1 parameter2...
For example:
gin@ubuntu :~$ ls -al ~
The command is LS; the option is-Al; the parameter is ~This command is used to list all files (including hidden files) in the main folder and related file attributes.
Where,-Lists All files in the main folder, including hidden files,-LList related file attributes.
Note:
- In Linux, commands are case sensitive.
- If the command is too long, use a backslash (\) to transfer the [enter] character. ([Enter] generally indicates the start of a line of commands. escape with a backslash)
- The command must be treated as a space no matter how many consecutive spaces exist. For example:Gin @ Ubuntu :~ $ LS-Al ~EquivalentGin @ Ubuntu :~ $ LS-Al ~
Change Supported languages
Echo $ LangCommand to display the current Supported languages. Use
Lang = en_usCommand to change the current supported language. En_us stands for American English. As follows:
Note: this is only because the supported language is changed during the current login.
Several simple commands
1. Help Command: -- Help
2. Display Date and Time: DateUse
Date -- HelpSome formats of Help Command calling % A literal %
% A locale's abbreviated weekday name (e.g., Sun)
% A locale's full weekday name (e.g., Sunday)
% B locale's abbreviated month name (e.g., Jan)
% B locale's full month name (e.g., January)
% C locale's date and time (e.g., Thu Mar 3 23:05:25 2005)
% C century; like % Y, percentage t omit last two digits (e.g., 20)
% D day of month (e.g., 01)
% D date; same as % m/% d/% Y
% E day of month, space padded; same as % _ d
% F full date; same as % Y-% m-% d
% G last two digits of year of ISO week number (see % G)
% G year of ISO week number (see % V); normally useful only with % v
% H same as % B
% H hour (00 .. 23)
% I hour (01 .. 12)
% J day of year (001. 366)
% K hour, space padded (0 .. 23); same as % _ H
% L hour, space padded (1 .. 12); same as % _ I
% M month (01 .. 12)
% M minute (00 .. 59)
% N a newline
% N nanoseconds (000000000 .. 999999999)
% P locale's equivalent of either am or PM; blank if not known
% P like % P, but lower case
% R locale's 12-hour clock time (e.g., 11:11:04)
% R 24-hour and minute; same as % H: % m
% S seconds since 1970-01-01 00:00:00 UTC
% S second (00 .. 60)
% T a tab
% T time; same as % H: % m: % s
% U day of week (1 .. 7); 1 is Monday
% U week number of year, with Sunday as first day of week (00 .. 53)
% V ISO week number, with Monday as first day of week (01 .. 53)
% W day of week (0 .. 6); 0 is Sunday
% W week number of year, with Monday as first day of week (00 .. 53)
% X locale's date representation (e.g., 12/31/99)
% X locale's time representation (e.g., 23:13:48)
% Y last two digits of year (00 .. 99)
% Y year
% Z + hhmm numeric Time Zone (e.g.,-0400)
%: Z + hh: Mm numeric Time Zone (e.g)
%: Z + hh: mm: SS numeric Time Zone (e.g.,-04:00:00)
%: Z numeric time zone with: To necessary precision (e.g.,-04, + 05:30)
% Z alphabetic Time Zone abbreviation (e.g., EDT) simple example:
Show Calendar command: CalCommand Format: Cal [[month] year] is as follows: calculator: exit from BC is the quit command. Note: There are two commands in the command line mode:
- One is that the command will directly display the result and return to the command prompt, waiting for the next command. For example, the Cal command.
- One is to enter the environment of the command, and the command will return to the command prompt only after the command is completed. For example, the BC command.
