Local Test Cases:
# there can be no spaces on either side of the equal sign, before the error has been out here
yesterday= ' date-d last-day +%y-%m-%d '
echo $yesterday
curday= ' Date +%y-%m-%d '
echo $curday
echo "Now time: ' Date ' +%y%m%d%T '"
Date--helpUsage: date [options] ... [+ format]Or: Date [-u|--utc|--universal] [MMDDHHMM[[CC]YY][.SS]]Displays the current time in the given format, or sets the system date.-D,--date= string displays the time described by the specified string, not
use the shell in Linux to get yesterday, tomorrow or many days before the date time -- A- , the: -:xxblogjava-Expert Area Original http://www.blogjava.net/xzclog/archive/2015/12/08/428555.htmlTheme Shell Original address:
The function of the date command is to display and set the system date and time.
The general format for this command is: date [options] Displays the time format (beginning with +, followed by formatting)
Date set time format
The meanings of the
Use the shell in Linux to get yesterday, tomorrow, or many days ago:In Linux, the man date-d parameter is relatively vague, the following examples further illustrate:#-D,--date=string display time described by STRING, not ' now '[Email protected]
DateCommandThe function of the date command is to display and set the system date and time.The general format for this command is: date [options] Displays the time format (beginning with +, followed by formatting)Date set time formatThe meanings of
Shell Script Introduction
Shell is a scripting language
You can use logical judgments, loops, and other syntax
Functions can be custom-defined
The shell is a collection of system commands
Shell scripts enable automated
Linux divides the clock into two types: the system clock and the hardware clock (Real time clock). System time refers to the clock in the current Linux kernel, while the hardware clock is the battery-powered motherboard hardware clock on the
For beginners who want to learn Linux, it can be very difficult to adapt to the command line or terminal. Since terminals are more useful than graphical user interface programs to help users control Linux systems, we must be accustomed to running
Beginners may feel inconvenience when they touch Linux, but there is no connection, there is a process of contact with new things, after you have used Linux for some time, you will gradually understand that Linux is as easy to master as Windows.Due
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