Sponsored Content
Top Forums UNIX for Dummies Questions & Answers ftping a file based in the size Post 302168630 by bakunin on Tuesday 19th of February 2008 03:37:57 AM
Old 02-19-2008
Quote:
Originally Posted by vikas.rao11
Thank dude.One more question though.
This keeps prompting for a password..
The reason is you haven't "exchanged the keys" as manikantants has "believed". ssh is a system where you can designate machine/user combinations as "trusted", so that they won't need a password. Do the following:

i assume you use user a on machine a to connect to machine b as user b. You don't want to need passwords if user a@a connects to b@b.

1.) log on to machine a as user a. Enter "ssh-keygen" to generate a key and follow the instruction. Do NOT enter any password when you are asked for it. Just press <ENTER>.

2.) You now have a directory "~/.ssh" with some files in it, depending on what type of key you have selected with ssh-keygen. In case you selected "rsa" in step one there would be two files "id_rsa" and "id_rsa.pub". NEVER TOUCH THE FILE id_rsa! Open the file id_rsa.pub with some editor or "cat" it to the terminal.

3.) Log on to machine b as user b and - if there is no directory "~/.ssh" - create a key there (Step 1). You won't need the key, but it creates the directory structure (~/.ssh) with the correct permissions as well.

4.) If there is no file "authorized_keys" create it, otherwise open it with a text editor. Cut and paste the content of of the file id_rsa.pub from the other machine to the end of this file. CAUTION: this is ONE long line, if you use screen-cut-and-paste you might get several lines of text delimited by newlines. Remove the newlines to get one long line back in this case. Save the file.

5.) From now on you can log on or transfer files without giving any password as user a@a to user b@b, but not the other way round. If you log on as user b@b you will have to present a password if you want to execute commands as user a@a. If you want to remove the necessity for passwords there too you will have to do the described process in the other direction again. CAUTION: you have to create a key (Step 1) ONLY ONCE, creating a new key makes all the entries in other authorized_key-files invalid.

I hope this helps.

bakunin
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Mail based on file size

Hi Friends, i am trying to write a shell script which will check for the logfile size. if the content of the logfile is wc -l >=1 then send mail with log file as attachment.else do nothing. i'm trying the below code can any one help on this if ] then (echo "`cat... (2 Replies)
Discussion started by: rajendragora
2 Replies

2. UNIX for Dummies Questions & Answers

Size limit for FTPing file

Is there any size limit for FTPing file from one unix system to another? (6 Replies)
Discussion started by: swarup2008
6 Replies

3. UNIX for Dummies Questions & Answers

Copy a file based on the size-Urgent

Hi, I need unix code to check the size of a file. for example if the size of the file in A folder is more than 1BM, then i have to move that particular file in to B folder whenever I run that particular script. regards, Srinivas. (7 Replies)
Discussion started by: vysrinivas
7 Replies

4. Shell Programming and Scripting

Need to move a file based on size

Hi All, I have some files in a directory. If the file size is 0 i want to move the file to new directory using unix script. Can anyone help me in this regard Thanks Vinny (4 Replies)
Discussion started by: vinny81
4 Replies

5. Shell Programming and Scripting

Moving a file based on size

hello, I am creating a script that is going to scan the contents of a directory, and if it finds a certain DocumentName that is a certain size (The example, DocumentName and a size of 8777) If this file exists, it needs to be moved to a directory for later removal/processing..anyone have... (7 Replies)
Discussion started by: jeffs42885
7 Replies

6. Shell Programming and Scripting

Split file based on size

Hi Friends, Below is my requirement. I have a file with the below structure. 0001A1.... 0001B1.. .... 0001L1 0002A1 0002B1 ...... 0002L1 .. the first 4 characters are the sequence numbers for a record, A record will start with A1 and end with L1 with same sequence number. Now the... (2 Replies)
Discussion started by: diva_thilak
2 Replies

7. Shell Programming and Scripting

Split a file based on pattern and size

Hello, I have a large file (2GB) that I would like to split based on pattern and size. I've used the following command to split the file (token is "HELLO") awk '/HELLO/{i++}{print > "file"i}' input.txt and the output is similar to the following (i included filesize in KB): 10 ... (2 Replies)
Discussion started by: jl487
2 Replies

8. Shell Programming and Scripting

Split file based on file size in Korn script

I need to split a file if it is over 2GB in size (or any size), preferably split on the lines. I have figured out how to get the file size using awk, and I can split the file based on the number of lines (which I got with wc -l) but I can't figure out how to connect them together in the script. ... (6 Replies)
Discussion started by: ssemple2000
6 Replies

9. Shell Programming and Scripting

Split the File based on Size

I have a file that is about 7 GB in size. The requirement is I should split the file equally in such a way that the size of the split files is less than 2Gb. If the file is less than 2gb, than nothing needs to be done. ( need to done using shell script) Thanks, (4 Replies)
Discussion started by: rudoraj
4 Replies

10. UNIX for Beginners Questions & Answers

File Size Split up based on Month

Hi, I have a directory in Unix and there are folders available in the directory. Files are created on different month and now i have a requirement to calculate size of the folder on month basis. Is there any Unix command to check this please?? Thanks (6 Replies)
Discussion started by: Nivas
6 Replies
FTPFS(4)						     Kernel Interfaces Manual							  FTPFS(4)

NAME
ftpfs - file transfer protocol (FTP) file system SYNOPSIS
ftpfs [ -/dq ] [ -m mountpoint ] [ -a password ] system DESCRIPTION
Ftpfs dials the TCP file transfer protocol (FTP) port, 21, on system and mounts itself (see bind(2)) on mountpoint (default /n/ftp) to pro- vide access to files on the remote machine. If required by the remote machine, ftpfs will prompt for a user name and password. The user names ftp and anonymous conventionally offer guest/read-only access to machines. Anonymous FTP may be called without user interaction by using the -a option and specifying the password. By default the file seen at the mount point is the user's remote home directory. The option -/ forces the mount point to correspond to the remote root. To avoid seeing startup messages from the server use option -q. To see all messages from the server use option -d. To terminate the connection, unmount (see bind(1)) the mount point. EXAMPLE
You want anonymous FTP access to the system export.lcs.mit.edu. The first import(4) command is only necessary if your machine does not have access to the desired system, but another, called gateway in this example, does. import gateway /net ftpfs -a yourname@yourmachine export.lcs.mit.edu SOURCE
/sys/src/cmd/ftpfs SEE ALSO
bind(2) BUGS
Symbolic links on remote Unix systems will always have mode 0777 and a length of 8. After connecting to a TOPS-20 system, the mount point will contain only one directory, usually /n/ftp/PS:<ANONYMOUS>. However, walking to any valid directory on that machine will succeed and cause that directory entry to appear under the mount point. Ftpfs caches files and directories. A directory will fall from the cache after 5 quiescent minutes or if the local user changes the direc- tory by writing or removing a file. Otherwise, remote changes to the directory that occur after the directory has been cached might not be immediately visible. There is no way to issue the appropriate commands to handle special synthetic FTP file types such as directories that automatically return a tar of their contents. FTPFS(4)
All times are GMT -4. The time now is 10:23 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy