These options provide a way to customize the behavior of PuTTYgen from the command line, allowing you to generate, convert, or modify cryptographic keys. There are many other commands of PuTTYgen in Linux to perform in the command prompt. Hence, these are a few important PuTTYgen commands in the Linux operating system. V or –version – The different number of version tools produced. L – This command specify the supported key types. This option allows you to specify the file to which the generated key or the modified key will be saved. o output-file – This command identifies the output file. for example -O private-openssh would convert the private key to the OpenSSH format.

O output type – This command convert the private key to another format. It can used when the -p command changes the passphrase or at the time of creating a new key. new-passphrase -file – This command gives rise to a new passphrase of the key. This command is only used for keys that are protected by a passphrase. old-passphrase-file It identifies the file from which the old passphrase key will read. The Passphrase cannot be modified on the command line. P – This command will change the passphrase of the key. The comment can be used to find the key owner, but cannot depend upon it because any other value can be applied to it. The comment can be used for both the new key and the existing key. The comment does not have any effect on the key operation. C new-comment – This command identifies a comment to explain the key.

q – This command prevents the message about progress during the time of key generation. It is recommended that 1024 bits for DSA keys and 2048 or 2096 bits for RSA keys are perfect size. b bits – It identifies the number of bits in a particular key. t key type – This command identifies the type of new key that is generated like RSA, DSA, ECDSA, and Ed25519. Key file – This is the name of an existing key file that PuTTYgen command will load and convert.

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