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File mkisofs has the following one line string:

xorriso -as mkisofs -r -checksum_algorithm_iso sha256,sha512 -V 'Debian 12.0.0 amd64 n' -o /srv/cdbuilder.debian.org/dst/deb-cd/out/2bookwormamd64/debian-12.0.0-amd64-NETINST-1.iso -checksum-list /srv/cdbuilder.debian.org/src/deb-cd/tmp/2bookwormamd64/bookworm/checksum-check -jigdo-checksum-algorithm md5 -jigdo-force-checksum /pool/ -jigdo-min-file-size 1024 -jigdo-exclude 'README*' -jigdo-exclude /doc/ -jigdo-exclude /md5sum.txt -jigdo-exclude /.disk/ -jigdo-exclude /pics/ -jigdo-exclude 'Release*' -jigdo-exclude 'Packages*' -jigdo-exclude 'Sources*' -jigdo-jigdo /srv/cdbuilder.debian.org/dst/deb-cd/out/2bookwormamd64/debian-12.0.0-amd64-NETINST-1.jigdo -jigdo-template /srv/cdbuilder.debian.org/dst/deb-cd/out/2bookwormamd64/debian-12.0.0-amd64-NETINST-1.template -jigdo-map Debian=/srv/cdbuilder.debian.org/src/ftp/debian/ -jigdo-exclude boot1 -J -joliet-long -cache-inodes -isohybrid-mbr syslinux/usr/lib/ISOLINUX/isohdpfx.bin -b isolinux/isolinux.bin -c isolinux/boot.cat -boot-load-size 4 -boot-info-table -no-emul-boot -eltorito-alt-boot -e boot/grub/efi.img -no-emul-boot -isohybrid-gpt-basdat -isohybrid-apm-hfsplus boot1 CD1

I need to remove every mode-flag with its options that start with "-jidgo". This is for part of the script I'm writing. Native or sed options preferred, but willing to expand resources to get the job done.

I was able to remove them after putting each mode-flag on a separate line, and then running:

sed -i 's/-jigdo-[^-]*//' mkisofs
sed -i 's/-jigdo[^-]*//' mkisofs

This doesn't work if left as one string. I also had to create two commands because it would only do a partial remove on "jigdo-exclude".

For a better view, this is what it looks like after spacing each line:

xorriso
-as mkisofs
-r
-checksum_algorithm_iso sha256,sha512
-V 'Debian 12.0.0 amd64 n'
-o /srv/cdbuilder.debian.org/dst/deb-cd/out/2bookwormamd64/debian-12.0.0-amd64-NETINST-1.iso
-checksum-list /srv/cdbuilder.debian.org/src/deb-cd/tmp/2bookwormamd64/bookworm/checksum-check
-jigdo-checksum-algorithm md5
-jigdo-force-checksum /pool/
-jigdo-min-file-size 1024
-jigdo-exclude 'README*'
-jigdo-exclude /doc/
-jigdo-exclude /md5sum.txt
-jigdo-exclude /.disk/
-jigdo-exclude /pics/
-jigdo-exclude 'Release*'
-jigdo-exclude 'Packages*'
-jigdo-exclude 'Sources*'
-jigdo-jigdo /srv/cdbuilder.debian.org/dst/deb-cd/out/2bookwormamd64/debian-12.0.0-amd64-NETINST-1.jigdo
-jigdo-template /srv/cdbuilder.debian.org/dst/deb-cd/out/2bookwormamd64/debian-12.0.0-amd64-NETINST-1.template
-jigdo-map Debian=/srv/cdbuilder.debian.org/src/ftp/debian/
-jigdo-exclude boot1
-J
-joliet-long
-cache-inodes
-isohybrid-mbr syslinux/usr/lib/ISOLINUX/isohdpfx.bin
-b isolinux/isolinux.bin
-c isolinux/boot.cat
-boot-load-size 4
-boot-info-table
-no-emul-boot
-eltorito-alt-boot
-e boot/grub/efi.img
-no-emul-boot
-isohybrid-gpt-basdat
-isohybrid-apm-hfsplus boot1 CD1

This is what it should look like when modified as a one line string:

xorriso -as mkisofs -r -checksum_algorithm_iso sha256,sha512 -V 'Debian 12.0.0 amd64 n' -o /srv/cdbuilder.debian.org/dst/deb-cd/out/2bookwormamd64/debian-12.0.0-amd64-NETINST-1.iso -checksum-list /srv/cdbuilder.debian.org/src/deb-cd/tmp/2bookwormamd64/bookworm/checksum-check -J -joliet-long -cache-inodes -isohybrid-mbr syslinux/usr/lib/ISOLINUX/isohdpfx.bin -b isolinux/isolinux.bin -c isolinux/boot.cat -boot-load-size 4 -boot-info-table -no-emul-boot -eltorito-alt-boot -e boot/grub/efi.img -no-emul-boot -isohybrid-gpt-basdat -isohybrid-apm-hfsplus boot1 CD1

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2 Answers 2

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Unless I'm overlooking something, this seems to work with the little bit of testing I've done:

sed -i -r 's/-jigdo[^ ]+ [^ ]+ //g' filename
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  • I'm assuming you wanted to remove the option passed to the -jigdo-something flags with my soution. Commented Jul 3, 2023 at 1:58
  • Thanks! I get to compare these two options now. As I just found something that looks to have worked, I haven't double checked. Commented Jul 3, 2023 at 2:03
  • OK. I did a diff of my results with the outcome you wanted, and it came out exactly. Commented Jul 3, 2023 at 2:04
  • Yep! Both commands have the exact same output. Yours is a shorter command. Makes me want to understand the style differences at a later time. Thanks for your time! Commented Jul 3, 2023 at 2:15
  • No problem. I'm not a sed or regex expert, but I needed it to fix a problem yesterday, so it was fresh in my mind. I was glad to have a problem to solve to cement some of the concepts. Commented Jul 3, 2023 at 2:21
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I asked Bing AI my question. Here is what worked...

You can use sed to remove the mode-flags and their options that start with -jigdo. Here’s an example command that should work:

sed 's/-jigdo[^ ]* [^ ]*//g' input.txt > output.txt
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This command uses a regular expression to match any text that starts with -jigdo, followed by any number of characters that are not a space, followed by a space, and then any number of characters that are not a space. This will match the mode-flag and its option. The g at the end of the command tells sed to perform this replacement globally, i.e., for all occurrences in the input line.

You can replace input.txt with the name of the file containing the original line, and output.txt with the name of the file where you want to save the modified line. If you want to perform this operation in-place, i.e., modify the original file directly, you can use the -i option:

sed -i 's/-jigdo[^ ]* [^ ]*//g' input.txt
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I hope this helps! Let me know if you have any questions or if there’s anything else I can do for you.

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How do I then clear any extra spaces between the mode-flags?
You can use another sed command to remove any extra spaces between the mode-flags. Here’s an example command that should work:

sed 's/  */ /g' input.txt > output.txt
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This command uses a regular expression to match any sequence of one or more spaces and replaces it with a single space. The g at the end of the command tells sed to perform this replacement globally, i.e., for all occurrences in the input line.

You can replace input.txt with the name of the file containing the line with extra spaces, and output.txt with the name of the file where you want to save the modified line. If you want to perform this operation in-place, i.e., modify the original file directly, you can use the -i option:

sed -i 's/  */ /g' input.txt
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You can combine this command with the previous one to remove the -jigdo mode-flags and their options, as well as any extra spaces between the remaining mode-flags, in a single command:

sed -i 's/-jigdo[^ ]* [^ ]*//g; s/  */ /g' input.txt
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I hope this helps! Let me know if you have any questions or if there’s anything else I can do for you.
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  • Thanks for mentioning your source! Commented Jul 6, 2023 at 21:19

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