Tag Archives: file

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

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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:

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

combined with given time range

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

and the the date of a commit in the filename

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

This should be this one:

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

OpenSSL: Asymmetric en- and decryption of a file


Hi,

this post describes the en- and decryption of a file with a asymmetric encryption algorithm.

Asymmetric encryption means you encrypt data by a public key and can only decrypt this data with a private key associated with the public key.
Continue reading OpenSSL: Asymmetric en- and decryption of a file

OpenSSL: Symmetric en- and decryption of a file


Hi,

this post describes the en- and decryption of a file with a symmetric encryption algorithm.

Symmetric encryption means encryption and decryption is only possible with the same secret/password.
Continue reading OpenSSL: Symmetric en- and decryption of a file

VirtualBox: Changing the UUID of a VDI virtual disk File

Hi,

sometimes you simply want to copy a vdi file and attach it to another virtual machine.

This will fail because in a VirtualBox Installation each vdi Harddisk must have an unique UUID. This command line changes the UUID of a VDI file.
Continue reading VirtualBox: Changing the UUID of a VDI virtual disk File