ESXi: ssh public/private key authentication

Hi,

to login to your ESXi Hosts by ssh using public/private key authentication you need to place your public key into the authorized_keys file of the correspondenting user.
Continue reading ESXi: ssh public/private key authentication

tcpdump: Some filter examples

Hi,

here are some command line examples for often requested packet filter strings
Continue reading tcpdump: Some filter examples

Git: Search in all versions of a file for a specific string

Hi,

to search in all versions of a file for a specfic string:
First get a list of all commits, then grep each commit:
Continue reading Git: Search in all versions of a file for a specific string

vCenter: Parameter for generation of ESXi Host certificates

Hi,

is a ESXi host part of a cluster then vCenter is responsible for the generation of the host certificates.
Continue reading vCenter: Parameter for generation of ESXi Host certificates

Git: Export all versions of a file within a given time range

Hi,

in some cases I uses git repositories for versioning log files and want to export a specific logfile in all versions:

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for CommitHash in `git rev-list HEAD -- myFolder/myfile`; do
    git show ${CommitHash}:myFolder/myfile > export/${CommitHash}_myfile
done

combined with given time range

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git  rev-list --after="2021-08-31" --until="2021-10-10" HEAD

and the the date of a commit in the filename

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git show --format=%cd -s --date=format:'%Y%m%d-%H%M%S' 8dba4dd6ef44fe0c069ec87eb179ac8f8ae2222c

This should be this one:

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export File=myFolder/myfile
export ExportFolder=/tmp
for CommitHash in `git rev-list --after="2021-11-01" --until="2021-11-16" HEAD -- $File`; do
    export CommitDate=$(git show --format=%cd -s --date=format:'%Y%m%d-%H%M%S' ${CommitHash})
    export ExportFileName=${ExportFolder}/${File}_${CommitDate}_${CommitHash}
    echo Exporting $ExportFileName 
    git show ${CommitHash}:${File} > $ExportFileName
done

Michael

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