But in such a case, when we share a public key from server/system B to server/system A, this generally indicates that user from server B is transferring files to server A and not vice-versa.
No! It means that the authentication is done in this direction.
Consider it this way: if you give someone the key to your house he has access to it. That could mean he takes away something or brings something, but this difference is not depending on him receiving your key or not. He could do both these things without the key too, he just would have to ring your bell (and wait till you answer it) if he lacks the key.
If userA@systemA (notice that "userA" on one system and "userA" on another system are two different accounts, they just happen to share the same name) has his key on systemB this user is allowed to log on (without password). What he does after this logon is not determined by the key at all. He could put files (that is: transfer to the server) or get files (that is: copy files from that server).
This is also possible with classical ftp or sftp: there is the put/mput command to move files to the system and get/mget command to move/copy files from the system.
In scp this would look like:
This will transfer a remote file from "system" using the account "user" to the local system. The other way would be:
This would transfer a local file using the account "user" to the remote system "system". The difference between having put the key of your local user on "system" will be: without the key you need to authenticate, with the key you don't.
Hello.
I have got 3 unix boxes A B C. Box A is being used to prepare some reports. After the reports generation, Box A sftp the reports to Box B and Box C. When I look at the report in Box B and Box C. The reports are different. In Box B, I see using od -x command there is CRLF (\r\n) at the end... (7 Replies)
Hi,
I have this problem where sometimes my files would go missing when I schedule my crontab to run the SCP command to get file from the SFTP server.
My crontab will run the scripts at an interval of 3 minutes (between the two scripts) The following is the setting in my crontab.
... (1 Reply)
Dear Unix Gurus,
I have a question to confirm before I proceed to script my program.
I'm currently running on IBM AIX Ver 5.3.
I just like to know if it's compatible to use scp or sftp between AIX and Wintel server?
I'm trying to scp or sftp a file from AIX to Window server and I was... (1 Reply)
Hi Frdz
I have a problem like.
I need to transfer a file from source to destination (different systems with different IPs) using "scp" command and before transfer the file i have to check the file is available in destination or not, if it is there no need to transfer, otherwise we have to... (5 Replies)
I have a shell script which uses SCP command to transfer the files from one server to another server. The files are getting transferred successfully, but the problem is the files transferred to the destination server didnot have the permissions as that of the files on the source server.
Command... (5 Replies)
Hello,
i have to write a script to perform sftp from the remote server to another server.
the files which are at the remote location are huge data log files which should be transfered to my server in a particular folder.
could you please provide me the general code (simple )... (1 Reply)
HI
I need to write a script in 415univ server which should go to 534unix server and move the files from there to windows server.
I am not able to get it bcoz sftp prompt is not allowing ftp command.
Can some one plz help me
Thanks in advance (3 Replies)
I have 3 AIX server namely - Server 1 , Server 2 and Server 3.
And have done SCP setup between Server 1 and Server 2 so that i dont have to give password when i transfer file from Server 1 to Server 2 by setting public key between the server.
Q1. If the unix password of the target server... (3 Replies)
On unix AIX server, when I am trying to transfer file from one directory to another directory on the same server through a program(where i call the script) it gives error "Lost Connection". (5 Replies)
Discussion started by: Pash
5 Replies
LEARN ABOUT REDHAT
sftp
SFTP(1) BSD General Commands Manual SFTP(1)NAME
sftp -- Secure file transfer program
SYNOPSIS
sftp [-vC1] [-b batchfile] [-o ssh_option] [-s subsystem | sftp_server] [-B buffer_size] [-F ssh_config] [-P sftp_server path]
[-R num_requests] [-S program] host
sftp [[user@]host[:file [file]]]
sftp [[user@]host[:dir[/]]]
DESCRIPTION
sftp is an interactive file transfer program, similar to ftp(1), which performs all operations over an encrypted ssh(1) transport. It may
also use many features of ssh, such as public key authentication and compression. sftp connects and logs into the specified host, then
enters an interactive command mode.
The second usage format will retrieve files automatically if a non-interactive authentication method is used; otherwise it will do so after
successful interactive authentication.
The last usage format allows the sftp client to start in a remote directory.
The options are as follows:
-b batchfile
Batch mode reads a series of commands from an input batchfile instead of stdin. Since it lacks user interaction it should be used in
conjunction with non-interactive authentication. sftp will abort if any of the following commands fail: get, put, rename, ln, rm,
mkdir, chdir, lchdir and lmkdir.
-o ssh_option
Can be used to pass options to ssh in the format used in ssh_config(5). This is useful for specifying options for which there is no
separate sftp command-line flag. For example, to specify an alternate port use: sftp -oPort=24.
-s subsystem | sftp_server
Specifies the SSH2 subsystem or the path for an sftp server on the remote host. A path is useful for using sftp over protocol ver-
sion 1, or when the remote sshd does not have an sftp subsystem configured.
-v Raise logging level. This option is also passed to ssh.
-B buffer_size
Specify the size of the buffer that sftp uses when transferring files. Larger buffers require fewer round trips at the cost of
higher memory consumption. The default is 32768 bytes.
-C Enables compression (via ssh's -C flag).
-F ssh_config
Specifies an alternative per-user configuration file for ssh. This option is directly passed to ssh(1).
-P sftp_server path
Connect directly to a local sftp-server (rather than via ssh) This option may be useful in debugging the client and server.
-R num_requests
Specify how many requests may be outstanding at any one time. Increasing this may slightly improve file transfer speed but will
increase memory usage. The default is 16 outstanding requests.
-S program
Name of the program to use for the encrypted connection. The program must understand ssh(1) options.
-1 Specify the use of protocol version 1.
INTERACTIVE COMMANDS
Once in interactive mode, sftp understands a set of commands similar to those of ftp(1). Commands are case insensitive and pathnames may be
enclosed in quotes if they contain spaces.
bye Quit sftp.
cd path
Change remote directory to path.
lcd path
Change local directory to path.
chgrp grp path
Change group of file path to grp. grp must be a numeric GID.
chmod mode path
Change permissions of file path to mode.
chown own path
Change owner of file path to own. own must be a numeric UID.
exit Quit sftp.
get [flags] remote-path [local-path]
Retrieve the remote-path and store it on the local machine. If the local path name is not specified, it is given the same name it
has on the remote machine. If the -P flag is specified, then the file's full permission and access time are copied too.
help Display help text.
lls [ls-options [path]]
Display local directory listing of either path or current directory if path is not specified.
lmkdir path
Create local directory specified by path.
ln oldpath newpath
Create a symbolic link from oldpath to newpath.
lpwd Print local working directory.
ls [flags] [path]
Display remote directory listing of either path or current directory if path is not specified. If the -l flag is specified, then dis-
play additional details including permissions and ownership information.
lumask umask
Set local umask to umask.
mkdir path
Create remote directory specified by path.
put [flags] local-path [local-path]
Upload local-path and store it on the remote machine. If the remote path name is not specified, it is given the same name it has on
the local machine. If the -P flag is specified, then the file's full permission and access time are copied too.
pwd Display remote working directory.
quit Quit sftp.
rename oldpath newpath
Rename remote file from oldpath to newpath.
rmdir path
Remove remote directory specified by path.
rm path
Delete remote file specified by path.
symlink oldpath newpath
Create a symbolic link from oldpath to newpath.
! command
Execute command in local shell.
! Escape to local shell.
? Synonym for help.
AUTHORS
Damien Miller <djm@mindrot.org>
SEE ALSO scp(1), ssh(1), ssh-add(1), ssh-keygen(1), ssh_config(5), sftp-server(8), sshd(8)
T. Ylonen and S. Lehtinen, SSH File Transfer Protocol, draft-ietf-secsh-filexfer-00.txt, January 2001, work in progress material.
BSD February 4, 2001 BSD