Linux Bash shell string split substring etc (RPM)

Original 52779364

The problem with script development is that the string splitting operation in the original Java (substring indexof, etc.) does not know what to do (e.g./a/b/c/d.txt I want to know the name of the file)

Query information that the shell can use identifiers to do the split string, including substring (0,index) and substring (index,last)

${VAR#*SUBSTR} Removes the last occurrence of a substring from 0 to substr

${VAR##*SUBSTR} will delete the position where the substr begins to the end of the string

${var%substr*} Removes the last part of the string where the string ends

${var%%substr*} will delete the first occurrence of the string to the end of the section

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1. A= "/a/b/c/d.txt"
2. b= "/"
3. echo ${a#* $b}

will return

A/b/c/d.txt

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1. A= "/a/b/c/d.txt"
2. b= "/"
3. echo ${a##* $b}

will return

D.txt

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1. A= "/a/b/c/d.txt"
2. b= "/"
3. echo ${a% $b *}

will return

/a/b/c

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1. A= "/a/b/c/d.txt"
2. b= "/"
3. echo ${a%% $b *}

will return empty

Linux Bash shell string split substring etc (RPM)