For example, I would like to do the following:
mv xxxx xxxx.bak
I know I could use this command instead:
mv xxxx{,.bak}
I think this is not direct somehow. It would be wonderful if I could do this:
mv xxxx $1.bak
And sometimes I'd need it like this:
echo xxxx yyyy $1.suffix
I know we can refer to arguments of the previous command using !:n, but can I also refer to arguments of the current command?
BTW, I want to do it directly in the shell, interactively.
The current command line is referenced with !#.
mv xxxx !#:1.bak
I recommend enabling the histverify option if you aren't already using it, so you have a chance to proofread or edit the results of the history expansion before actually executing it. To do so:
shopt -s histverify
Or, if you don't want to enable that option and just want to verify a single command, use the :p modifier to print the expansion instead of executing it:
$ mv xxx !#:1:p.bak
mv xxx xxx.bak
$
one way is to use a variable for this. simply like :
f="file"
cp $f $f.bak
!$to refer to the current command and uses$to refer to the previous (instead of the very first) argument. For example,ocrmypdf --deskew --optimize 3 my.pdf !#$:r_ocr.pdfwill expand the last argument tomy_ocr.pdf.