text replacement help

[dolphin_oracle]

in a bash script I need to replace 2 words in a string with new words. I know one of the words, and the other follows. For instance

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xserver_arguments -dpi 120 -nolisten tcp

needs replaced so that the 120 is something else. the -dpi is the parameter to change.

Order is not ensured, nor is the presence at all.. however, I can test for the presence of the parameter ahead of time, so I can append or replace as needed.

any help is appreciated. this will fix a bug in an antiX settings app.

TIA

d.o.

[Adrian]

Not a sed master by any measure, would this work?

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sed -i  's/-dpi [^ ]*/-dpi 200/' filename

That should replace "-dpi xxx" with "-dpi 200"

Try different version of the string here https://regexr.com/ (use only the first part of the sed expression to see what it matches)

[dolphin_oracle]

ah, looks promising, thanks!

*edit* yep, that does the trick