Skip to Content
Linux in a Nutshell, Fourth Edition
book

Linux in a Nutshell, Fourth Edition

by Ellen Siever, Stephen Figgins, Aaron Weber
June 2003
Beginner to intermediate
944 pages
43h 1m
English
O'Reilly Media, Inc.
Content preview from Linux in a Nutshell, Fourth Edition

Name

ssh-add

Synopsis

                  ssh-add [options] [files]
ssh-add -e|-s 
                  reader
               

Add RSA or DSA identities to the authentication agent (see ssh-agent), which must be running and must be an ancestor of the current process. With no arguments specified, add the files $HOME/.ssh/id_rsa, $HOME/.ssh/id_dsa, and $HOME/.ssh/identity. If any files are specified, add those instead, prompting for a passphrase if required.

Options

-d

Remove an identity from the agent instead of adding one.

-D

Delete all identities from the agent.

-e reader

Remove key in specified smartcard reader.

-l

List fingerprints of all identities known to the agent.

-L

List public key parameters of all identities known to the agent.

-s

Add key in smartcard reader.

-t life

Set maximum lifetime when adding identities to an agent. The value of life can be in seconds or another time format specified in sshd.

-x

Lock the agent with a password.

-X

Unlock the agent.

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.

Read now

Unlock full access

More than 5,000 organizations count on O’Reilly

AirBnbBlueOriginElectronic ArtsHomeDepotNasdaqRakutenTata Consultancy Services

QuotationMarkO’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.
Julian F.
Head of Cybersecurity
QuotationMarkI wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.
Addison B.
Field Engineer
QuotationMarkI’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.
Amir M.
Data Platform Tech Lead
QuotationMarkI'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Mark W.
Embedded Software Engineer

You might also like

Linux in a Nutshell, 6th Edition

Linux in a Nutshell, 6th Edition

Ellen Siever, Stephen Figgins, Robert Love, Arnold Robbins
Embedded Linux for Developers

Embedded Linux for Developers

Alexandru Vaduva, Alex González, Chris Simmonds
Linux in Action

Linux in Action

David Clinton

Publisher Resources

ISBN: 0596004826