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Monday, 21 August 2017

ssh-keygen Linux Command

ssh-keygen


ssh-keygen [options]

Generate, manage, and convert authentication keys for ssh. When using ssh-keygen to create a key, the -t option must be specified to identify the type of key to create.

Options


-b bits
Specify the number of bits in the key. The minimum is 512, and the default is 1024.

-B
Show the bubblebabble digest (a digest represented as a string that looks like real words) for the private or public keyfile specified with -f.

-c
Change the comment in the private and public keyfiles (for RSA1 keys only).

-C comment
Specify the new comment.

-D reader
Download the RSA public key from the smartcard in reader.

-e
Read an OpenSSH private or public keyfile and write it in SECSH Public Key File Format to standard output for exporting to a commercial SSH.

-f file
Specify the filename of the keyfile.

-i
Read an SSH2-compatible unencrypted private or public keyfile and write an OpenSSH-compatible key to standard output. Used to import keys from a commercial SSH.

-l
Show fingerprint of public or private RSA1 keyfile specified with -f.

-N passphrase
Specify the new passphrase.

-p
Change the passphrase for a private keyfile. Prompt for the file, the old passphrase, and twice for the new passphrase.

-P passphrase
Specify the old passphrase.

-q
Operate in quiet mode.

-t type
Specify the type of key to create. Possible values of type are rsa1 for SSH1, and rsa or dsa for SSH2.

-U reader
Upload an existing RSA private key to the smartcard in reader.

-y
Read a private OpenSSH-format file and print a public key to standard output.
Annamalai Thangaraj

Annamalai is working as Technical Lead in Leading Telecom company with 5+ years experience in Identity and Access Management , Telecom and Networks, BigData, Java, Spring, Struts, Hibernate, AngularJS, and Enterprise Web Application Development.

Website: Java Tutorials Corner

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Item Reviewed: ssh-keygen Linux Command Rating: 5 Reviewed By: Annamalai Thangaraj