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by yawaramin 1105 days ago
Use `date -u -Iseconds`, please ;-)
1 comments
drivers99 1105 days ago 

    date: illegal option -- I
    usage: date [-jnRu] [-d dst] [-r seconds] [-t west] [-v[+|-]val[ymwdHMS]] ... 
                [-f fmt date | [[[mm]dd]HH]MM[[cc]yy][.ss]] [+format]
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yawaramin 1105 days ago
https://www.gnu.org/software/coreutils/manual/html_node/Opti...
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mynegation 1105 days ago
Let me guess, you are on a Mac.
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yawaramin 1105 days ago
Probably on an older Mac or FreeBSD. On my macOS 12.6, `man date` says:

    The -I flag was added in FreeBSD 12.0.
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drivers99 1104 days ago
Yup. macOS Catalina
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