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Bash Reference Manual

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9.3.3 Modifiers

After the optional word designator, you can add a sequence of one or more of the following modifiers, each preceded by a `:'.

h
Remove a trailing pathname component, leaving only the head.

t
Remove all leading pathname components, leaving the tail.

r
Remove a trailing suffix of the form `.suffix', leaving the basename.

e
Remove all but the trailing suffix.

p
Print the new command but do not execute it.

q
Quote the substituted words, escaping further substitutions.

x
Quote the substituted words as with `q', but break into words at spaces, tabs, and newlines.

s/old/new/
Substitute new for the first occurrence of old in the event line. Any delimiter may be used in place of `/'. The delimiter may be quoted in old and new with a single backslash. If `&' appears in new, it is replaced by old. A single backslash will quote the `&'. The final delimiter is optional if it is the last character on the input line.

&
Repeat the previous substitution.

g
Cause changes to be applied over the entire event line. Used in conjunction with `s', as in gs/old/new/, or with `&'.


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