What linux shell command returns a part of a string

Question

I want to find a linux command that can return a part of the string  In most programming languages  it s the substr   function  Does bash have any command that can be used for this purpose  I want to be able to do something like this    substr  abcdefg  2 3 - prints cde     Subsequent similar question    Extract substring in Bash

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From the bash manpage     parameter offset    parameter offset length          Substring  Expansion    Expands  to  up  to length characters of         parameter starting at the character  specified  by  offset            Or  if you are not sure of having bash  consider using cut

User · Answer

string position length

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expr 1  has a substr subcommand   expr substr  lt string gt   lt start-index gt   lt length gt    This may be useful if you don t have bash  perhaps embedded Linux  and you don t want the extra  echo  process you need to use cut 1

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In bash you can try this   stringZ abcABC123ABCabc         0123456789              0-based indexing   echo   stringZ 0 2    prints ab   More samples in The Linux Documentation Project

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In  pure  bash you have many tools for  sub string manipulation  mainly  but not exclusively in parameter expansion      parameter  substring replacement    parameter  remove matching prefix    parameter  remove matching suffix    Indexed substring expansion  special behaviours with negative offsets  and  in newer Bashes  negative lengths      parameter offset    parameter offset length    parameter offset length    And of course  the much useful expansions that operate on whether the parameter is null     parameter  use this if param is NOT null    parameter -use this if param is null    parameter  use this and assign to param if param is null    parameter  show this error if param is null    They have more tweakable behaviours than those listed  and as I said  there are other ways to manipulate strings  a common one being   command substitution  combined with sed or any other external filter   But  they are so easily found by typing man bash that I don t feel it merits to further extend this post

User · Answer

expr 1  has a substr subcommand   expr substr  lt string gt   lt start-index gt   lt length gt    This may be useful if you don t have bash  perhaps embedded Linux  and you don t want the extra  echo  process you need to use cut 1

User · Answer

If you are looking for a shell utility to do something like that  you can use the cut command   To take your example  try   echo  abcdefg    cut -c3-5   which yields  cde   Where -cN-M tells the cut command to return columns N to M  inclusive

User · Answer

From the bash manpage     parameter offset    parameter offset length          Substring  Expansion    Expands  to  up  to length characters of         parameter starting at the character  specified  by  offset            Or  if you are not sure of having bash  consider using cut

User · Answer

From the bash manpage     parameter offset    parameter offset length          Substring  Expansion    Expands  to  up  to length characters of         parameter starting at the character  specified  by  offset            Or  if you are not sure of having bash  consider using cut

User · Answer

In  pure  bash you have many tools for  sub string manipulation  mainly  but not exclusively in parameter expansion      parameter  substring replacement    parameter  remove matching prefix    parameter  remove matching suffix    Indexed substring expansion  special behaviours with negative offsets  and  in newer Bashes  negative lengths      parameter offset    parameter offset length    parameter offset length    And of course  the much useful expansions that operate on whether the parameter is null     parameter  use this if param is NOT null    parameter -use this if param is null    parameter  use this and assign to param if param is null    parameter  show this error if param is null    They have more tweakable behaviours than those listed  and as I said  there are other ways to manipulate strings  a common one being   command substitution  combined with sed or any other external filter   But  they are so easily found by typing man bash that I don t feel it merits to further extend this post

User · Answer

If you are looking for a shell utility to do something like that  you can use the cut command   To take your example  try   echo  abcdefg    cut -c3-5   which yields  cde   Where -cN-M tells the cut command to return columns N to M  inclusive

User · Answer

expr 1  has a substr subcommand   expr substr  lt string gt   lt start-index gt   lt length gt    This may be useful if you don t have bash  perhaps embedded Linux  and you don t want the extra  echo  process you need to use cut 1

User · Answer

In bash you can try this   stringZ abcABC123ABCabc         0123456789              0-based indexing   echo   stringZ 0 2    prints ab   More samples in The Linux Documentation Project

User · Answer

string position length

User · Answer

In bash you can try this   stringZ abcABC123ABCabc         0123456789              0-based indexing   echo   stringZ 0 2    prints ab   More samples in The Linux Documentation Project

User · Answer

string position length

User · Answer

If you are looking for a shell utility to do something like that  you can use the cut command   To take your example  try   echo  abcdefg    cut -c3-5   which yields  cde   Where -cN-M tells the cut command to return columns N to M  inclusive

User · Answer

string position length

User · Answer

expr 1  has a substr subcommand   expr substr  lt string gt   lt start-index gt   lt length gt    This may be useful if you don t have bash  perhaps embedded Linux  and you don t want the extra  echo  process you need to use cut 1

User · Answer

From the bash manpage     parameter offset    parameter offset length          Substring  Expansion    Expands  to  up  to length characters of         parameter starting at the character  specified  by  offset            Or  if you are not sure of having bash  consider using cut

User · Answer

If you are looking for a shell utility to do something like that  you can use the cut command   To take your example  try   echo  abcdefg    cut -c3-5   which yields  cde   Where -cN-M tells the cut command to return columns N to M  inclusive

User · Answer

In bash you can try this   stringZ abcABC123ABCabc         0123456789              0-based indexing   echo   stringZ 0 2    prints ab   More samples in The Linux Documentation Project

[linux] What linux shell command returns a part of a string?

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