Is there a shortcut in Shell/Bash that can rename all the files in a folder based on a regex or some other criteria. What I am looking for here is in my folder documents, that has let's say a 100 text files with the following naming convention:
<longdocumentidentifier>-doc-<counter>.txt.
I need to rename all the files with the above given convention to just:
doc-<counter>.txt
Is there a one-liner that can help me with the above?
I would suggest something like this:
for i in *-doc-*.txt; do mv "$i" "${i/*-doc-/doc-}"; done
${i/*-doc-/doc-}
replaces the first occurrence of *-doc-
with doc-
.
If you need to do more than one replacement (see comment number 1), you need to use the ${var//Pattern/Replacement}
variant. If you need to replace the beginning of the name you need to use ${var/#Pattern/Replacement}
, if you need to replace the end (ie: the extension) you need to use the ${var/%Pattern/Replacement}
form.
See Shell Parameter Expansion for more details. This expansion is bash specific.