Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Help understanding what this ls -l command is checking in a script
Top Forums UNIX for Beginners Questions & Answers Help understanding what this ls -l command is checking in a script Post 303039571 by jim mcnamara on Wednesday 9th of October 2019 06:52:24 PM
Old 10-09-2019
The command connects to a remote server, does and ls -l of a directory, which list files in the directory on the remote machine. The command is between the tic characters '

The output of the ls command goes into the bit bucket (kind of like a black hole for output). The status of the ssh connect and ls (success ( == 0 ) or failure code (== non-zero) ) is stored in the variable $status.

A sort of roundabout way to see if the remote machine is awake on the network, and if the directory exists over there. The options -qno for ssh:
-n used to run in the background when ssh does not read from user's stdin (terminal)
-q quiet mode, stops extra messages
-o (option) turn off strict host key checking. I wonder why...
This User Gave Thanks to jim mcnamara For This Post:
MadeInGermany
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Need help understanding script command

We use a UNIX-based system (Lawson) at work and I was given this command to request a data extract from the db admin. The only thing I really understand is the last line as it appears to be joining the files created from the first three lines into one. Is there anyone who can help me breakdown the... (4 Replies)
Discussion started by: KGee
4 Replies

2. Shell Programming and Scripting

understanding the sed command

Guys, I am trying to understand the sed command here. adx001 $ a=/clocal/dctrdata/user/dctrdat1/trdroot/recouncil adx001 $ b=`echo $a | sed 's/\//\\\\\//g'` adx001 $ echo $b \/clocal\/dctrdata\/user\/dctrdat1\/trdroot\/recouncil The sed command i took it from the script. Please... (3 Replies)
Discussion started by: mac4rfree
3 Replies

3. Shell Programming and Scripting

understanding the kill command

Hi Guys, I like to know if i have a process which triggers 10 different child processes. How to identify out of the 11 processes running which is the parent process and what are the child process? And if i kill the parent process will the child process be killed.. if not is there a way to... (2 Replies)
Discussion started by: mac4rfree
2 Replies

4. Shell Programming and Scripting

understanding mv command

hi i was moving a file from one directory to another with the following cmmand mv /home/hsghh/dfd/parent/file.txt . while doing so i i accidently mv /home/hsghh/dfd/dfd . although i gave ctrl c and terminate the move command some of the file are missing in the parent directory and... (1 Reply)
Discussion started by: saravanan71184
1 Replies

5. Solaris

Understanding 'du' command

Hi I have a questions related 2 commands : 'du' and 'ls'. Why is the difference between output of 'du' and 'ls' cmd's ? Command 'du' : ------------------ jakubn@server1 /home/jakubn $ du -s * 4 engine.ksh 1331 scripts 'du -s *' ---> shows block count size on disk (512 Bytes... (5 Replies)
Discussion started by: presul
5 Replies

6. Shell Programming and Scripting

Understanding 'find' command

I want to understand what does this command do:confused::confused: find . \( -type f -o -type 1 \) Plz someone explain me ! Thanks much in advance!! (2 Replies)
Discussion started by: sears
2 Replies

7. UNIX for Dummies Questions & Answers

understanding sed command

Hi Friends, I need a small help in understanding the below sed command. $ cat t4.txt 1 root 1 58 0 888K 368K sleep 4:06 0.00% init 1 root 1 58 0 888K 368K sleep 4:06 0.00% init last $ sed 's/*$//' t4.txt 1 root 1 58 0 888K ... (3 Replies)
Discussion started by: forroughuse
3 Replies

8. UNIX for Advanced & Expert Users

Checking missing data's sequence (shell script | UNIX command)

Dear All members, i have some trouble here, i want to ask your help. The case is: I have some data, it's like: -ABCD1234 -ABCD1235 -ABCD1237 -BCDE1111 -BCDE1112 -BCDE1114 there is some missing data's sequence (the format is: ABCD = name 1234 = sequence). I want to print the... (2 Replies)
Discussion started by: septian.tri
2 Replies

9. Shell Programming and Scripting

awk : Need Help in Understanding a command

Hello I am working on a Change request and Stuck at a point. The below awk command is used in the function. float_test ( ) { echo | awk 'END { exit ( !( '"$1"')); }' } I understand that awk 'END' is used to add one line at the end and exit is used to end the script with an error... (4 Replies)
Discussion started by: rahul2662
4 Replies

10. Shell Programming and Scripting

Command script for checking a file existence

Hello, I have a directory where sometimes appear a certain file name - and I'd like to be notified by email when that happens... so what command or script I may use? e.g. if there's a file named "adam" in the directory named "dir1" then send a mail to "abc@abc.com".. it needs to permanently... (5 Replies)
Discussion started by: netrom
5 Replies

LEARN ABOUT DEBIAN

backup-manager-upload

BACKUP-MANAGER-UPLOAD(8)				       backup-manager-upload					  BACKUP-MANAGER-UPLOAD(8)

NAME

       backup-manager-upload - Multiprotocol uploader for backup-manager.

SYNOPSIS

       backup-manager-upload [options] date

DESCRIPTION

       backup-manager-upload will upload all the archives generated on the given date to the specified host with either ftp or scp.  It's also
       possible to use this program for uploading data to an Amazon S3 account.  Some metadates are available like "today" or "yesterday".

REQUIRED ARGS

       --mode=transfer-mode
	   Select the transfer mode to use : ftp, scp, or s3.

       --host=hostname1,hostname2,...,hostnameN
	   Select a list of remote hosts to connect to.

       --user=username
	   Select the user to use for connection.

OPTIONAL ARGS

       --password=password
	   Select the ftp user's password (only needed for ftp transfers).

       --key=path_to_private_key
	   Select the ssh private key file to use when opening the ssh session for scp transfer.  Obviously, this is only needed for scp transfer
	   mode.  If you don't specify a key file, the user's default private key will be used.

       --directory=directory
	   Select the location on the remote host where files will be uploaded.  Default is /backup/uploads.

       --bucket=bucket
	   Sets the bucket name for the Amazon S3 service backup into.

       --root=directory
	   Select the local directory where files are.	Default is /var/archives

       --gpg-recipient=gpg-recipient
	   Select the gpg public key for encryptiong the archives when uploading with the method ssh-gpg. This can be a short or long key id or a
	   descriptive name. The precise syntax is described in the gpg man page.

       --list
	   Just list the files to upload.

       --ftp-purge
	   Purge the remote directory before uploading files in FTP mode.

       --s3-purge
	   Purge the remote directory before uploading files in FTP mode.

       --ssh-purge
	   Purge the remote directory before uploading files in SSH mode.

       --verbose
	   Flag to enable verbose mode.

       date
	   Date pattern to select some files to upload, can be a valid date (YYYYMMDD) or 'today' or 'yesterday'.

ERROR CODES

       If something goes wrong during an upload, backup-manager-upload will exit with a non null value. In such a case every error messages are
       sent to STDERR.

       Here are the possible error codes:

       bad command line (wrong arguments) : 10
       FTP transfer failure : 20
       SCP transfer failure : 21
       S3 transfer failure : 22
       Unknown upload method: 23

SEE ALSO

       backup-manager(3)

AUTHORS

       Alexis Sukrieh - main code and design

       Brad Dixon - Amazon S3 upload method

       Jan Metzger - ssh-gpg upload method

perl v5.14.2							    2012-05-09						  BACKUP-MANAGER-UPLOAD(8)
All times are GMT -4. The time now is 11:36 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy