サーバーのよく使うコマンドメモ| ssh-add

2015年4月19日

コマンド サーバー テクノロジー

Summery

sshの秘密鍵をクライアント端末に登録する。 ※ただし、ターミナルを終了すると、登録は消えてしまう。

Construction

$ ssh-add [option] [key-file]

Option

-l : 一覧表示 -K : ターミナルを閉じても登録された鍵を保持する(macのキーチェーンに保存する) -d : 個別鍵を削除 -D : 一覧を全削除

Sample

# 一覧表示 ssh-add -l

Discription

NAME ssh-add -- adds private key identities to the authentication agent SYNOPSIS ssh-add [-cDdkLlXxKA] [-t life] [file ...] ssh-add -s pkcs11 ssh-add -e pkcs11 DESCRIPTION ssh-add adds private key identities to the authentication agent, ssh-agent(1). When run without arguments, it adds the files ~/.ssh/id_rsa, ~/.ssh/id_dsa, ~/.ssh/id_ecdsa and ~/.ssh/identity. After loading a private key, ssh-add will try to load corresponding certificate information from the filename obtained by appending -cert.pub to the name of the private key file. Alternative file names can be given on the command line. If any file requires a passphrase, ssh-add asks for the passphrase from the user. The passphrase is read from the user's tty. ssh-add retries the last passphrase if multiple identity files are given. The authentication agent must be running and the SSH_AUTH_SOCK environment variable must contain the name of its socket for ssh-add to work. The options are as follows: -c Indicates that added identities should be subject to confirmation before being used for authentication. Confirmation is performed by the SSH_ASKPASS program mentioned below. Successful confirmation is signaled by a zero exit status from the SSH_ASKPASS program, rather than text entered into the requester. -D Deletes all identities from the agent. -d Instead of adding identities, removes identities from the agent. If ssh-add has been run without arguments, the keys for the default identities and their corresponding certifi- cates will be removed. Otherwise, the argument list will be interpreted as a list of paths to public key files to specify keys and certificates to be removed from the agent. If no public key is found at a given path, ssh-add will append .pub and retry. -e pkcs11 Remove keys provided by the PKCS#11 shared library pkcs11. -k When loading keys into or deleting keys from the agent, process plain private keys only and skip certificates. -L Lists public key parameters of all identities currently represented by the agent. -l Lists fingerprints of all identities currently represented by the agent. -s pkcs11 Add keys provided by the PKCS#11 shared library pkcs11. -t life Set a maximum lifetime when adding identities to an agent. The lifetime may be specified in seconds or in a time format specified in sshd_config(5). -X Unlock the agent. -x Lock the agent with a password. -K When adding identities, each passphrase will also be stored in your keychain. When remov- ing identities with -d, each passphrase will be removed from your keychain. -A Add identities to the agent using any passphrases stored in your keychain. ENVIRONMENT DISPLAY and SSH_ASKPASS If ssh-add needs a passphrase, it will read the passphrase from the current terminal if it was run from a terminal. If ssh-add does not have a terminal associated with it but DISPLAY and SSH_ASKPASS are set, it will execute the program specified by SSH_ASKPASS and open an X11 window to read the passphrase. This is particularly useful when calling ssh-add from a .xsession or related script. (Note that on some machines it may be neces- sary to redirect the input from /dev/null to make this work.) SSH_AUTH_SOCK Identifies the path of a UNIX-domain socket used to communicate with the agent. FILES ~/.ssh/identity Contains the protocol version 1 RSA authentication identity of the user. ~/.ssh/id_dsa Contains the protocol version 2 DSA authentication identity of the user. ~/.ssh/id_ecdsa Contains the protocol version 2 ECDSA authentication identity of the user. ~/.ssh/id_rsa Contains the protocol version 2 RSA authentication identity of the user. Identity files should not be readable by anyone but the user. Note that ssh-add ignores identity files if they are accessible by others. EXIT STATUS Exit status is 0 on success, 1 if the specified command fails, and 2 if ssh-add is unable to con- tact the authentication agent. SEE ALSO ssh(1), ssh-agent(1), ssh-keygen(1), sshd(8) AUTHORS OpenSSH is a derivative of the original and free ssh 1.2.12 release by Tatu Ylonen. Aaron Camp- bell, Bob Beck, Markus Friedl, Niels Provos, Theo de Raadt and Dug Song removed many bugs, re- added newer features and created OpenSSH. Markus Friedl contributed the support for SSH protocol versions 1.5 and 2.0. BSD April 12, 2015 BSD