https://old.andunix.net/ 2026-06-03T23:24:06+00:00 https://old.andunix.net/ https://old.andunix.net/_media/favicon.ico text/html 2013-02-04T22:17:34+00:00 Anonymous (anonymous@undisclosed.example.com) https://old.andunix.net/info/script/dyndns_updates_without_client DynDNS Updates without a Client My new hosting provide Strato offers DynDNS. I was searching for a DynDNS client for my OpenSolaris Home Server, but a small bash script does the job as good as any other client. #! /bin/bash . ${HOME}/.dyndns.cfg DOMAINS=$(cat ${HOME}/.dyndns.domains) echo "$(date '+%Y-%m-%d %H:%M') $(basename $0)" for domain in ${DOMAINS}; do echo -n " ${domain} - " curl --silent --show-error --insecure --user ${LOGIN} "${UPDATE_URL}?hostname=${domain}" d… text/html 2015-10-23T12:39:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://old.andunix.net/info/script/variables Shell Script Variables Last Character Get the last character of $a: ${a: -1} Remove Slash from the End of a Variable Remove a trailing slash from $a: a=${a%/} scripting bash sysadmin variable text/html 2016-09-26T19:25:34+00:00 Anonymous (anonymous@undisclosed.example.com) https://old.andunix.net/info/script/exiftool exiftool Rename Photos Try it first with -testname: exiftool -d %Y-%m-%d_%H%M%S%%-c.%%e "-testname<CreateDate" *.jpg Then rename the files: exiftool -d %Y-%m-%d_%H%M%S%%-c.%%e "-filename<CreateDate" *.jpg Correct the Date of Photos To shift the photos 43 days, 14 hours and 55 minutes to the future: text/html 2018-09-19T12:34:39+00:00 Anonymous (anonymous@undisclosed.example.com) https://old.andunix.net/info/script/compare_directories Compare directories For each of the directories, generate a digest file: find DIR -type f -exec shasum {} + | LC_ALL=C sort -d -k 2 > shasums.txt It's important to use LC_ALL=C and the option -d of sort, to get compareable results on different machines.