Notes on metacharacters of Shell statements in Linux

& Nbsp; LinuxShell metacharacter knowledge note: ^ The first line locator/^ love/matches the line starting with love $ the last line locator/love $/matches the line ending with love. match a single character/l .. e/match the line that contains one l followed by two characters and one e * matches zero or multiple rows before *  

Linux Shell metacharacters:

^ The first line locator/^ love/matches the line starting with love

$ Line tail Locator/love $/match the line ending with love

. Match a single character/l. e/match the line that contains one l followed by two characters and then one e

* Match 0 or multiple characters before */* love/match zero or multiple spaces followed by love rows

[] Match any one of the characters/[Ll] ove/match the line of Love or love

[X-y] matches any character in the specified range

[^] Match any character not in the specified character Group [^ A-Z] match any character not in the A-Z

Used to convert metacharacters/love./to match the line after a period of love

<Beginning or end of a word Locator/>

X {m} character x repeated m times

The characters x {m,} must be repeated at least m times.

Repeated characters of x {m, n} appear between m and n