How can I remove all text after a character in bash

Question

How can I remove all text after a character  in this case a colon        in bash  Can I remove the colon  too  I have no idea how to

User · Answer

echo  hello world again   sed  s        hello

User · Answer

Let s say you have a path with a file in this format    dirA dirB dirC filename file   Now you only want the path which includes four      Type    echo   dirA dirB dirC filename file    cut -f1-4 -d      and your output will be   dirA dirB dirC   The advantage of using cut is that you can also cut out the uppest directory as well as the file  in this example   so if you type    echo   dirA dirB dirC filename file    cut -f1-3 -d      your output would be   dirA dirB   Though you can do the same from the other side of the string  it would not make that much sense in this case as typing    echo   dirA dirB dirC filename file    cut -f2-4 -d      results in  dirA dirB dirC   In some other cases the last case might also be helpful  Mind that there is no     at the beginning of the last output

User · Answer

trim off everything after the last instance of      cat fileListingPathsAndFiles txt   grep -o          and if you wanted to drop that last      cat file txt   grep -o          sed  s          kp123  you d want to replace   with    where the sed colon should be

User · Answer

egrep -o

User · Answer

An example might have been useful  but if I understood you correctly  this would work  echo  quot Hello  world quot    cut -f1 -d quot   quot   This will convert Hello  world into Hello

User · Answer

In Bash  and ksh  zsh  dash  etc    you can use parameter expansion with   which will remove characters from the end of the string or   which will remove characters from the beginning of the string  If you use a single one of those characters  the smallest matching string will be removed  If you double the character  the longest will be removed    a  hello world     b   a       echo  quot  b quot  hello    a  hello world of tomorrow     echo  quot   a     quot  hello world of    echo  quot   a      quot  hello    echo  quot   a     quot  world of tomorrow    echo  quot   a      quot  tomorrow

[bash] How can I remove all text after a character in bash?

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