Sponsored Content
Top Forums Shell Programming and Scripting Reading Multiple Variables From a Single Line in Shell Post 302100554 by Drek on Wednesday 20th of December 2006 11:12:51 AM
Old 12-20-2006
Reading Multiple Variables From a Single Line in Shell

I'm a Linux newb, I've been running a Debian Linux server for about a year now, and I've written some simple scripts to automate various things, but I still don't know much, and I forget what I learn as fast as I figure it out... Anyway, that really isn't important, I just want you to know that you will probably need to keep things simple if you answer my question. I use ssh to access my server so it is all command line.

I want to write a script to automate backups of certain files on my server. What I've done is create at text file with the name I want to call the backup file, and the folder or file I want to back up seperated by a space, one backup file per line, as follows:

mysql_config /etc/mysql
apache2_config /etc/apache2

What I want to do is have the script read each line, and create a gzipped tarball of each file/folder with the name I have given. My problem is that, as I understand it, cat goes line by line, how do I extract the two different variables from each line? Everything else I think I can figure out, but that one has me stumped. I was thinking I could use awk or mawk, but how do I get awk to only parse one line incrementally?

Thanks in advance. I'm pretty sure this will be simple once I see the solution...
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

reading a single line

hello, i need an algorithm which reads a line specified to it in shortest possible time. i am already using sed, i need a better way. please suggest me alternatives (2 Replies)
Discussion started by: rochitsharma
2 Replies

2. Shell Programming and Scripting

Reading multiple lines as single

Hi, Is it possible to read every 2 lines as single record, I have a file like below, ~CZK ~TSCHECHISCHE KRONE ~TSCHECH. REPUBLIK Dec 1 2005 12:00AM~ 10.840000~ ~DKK ~DAENISCHE KRONE ~DAENEMARK Dec 2 2005 12:00AM~ ... (9 Replies)
Discussion started by: braindrain
9 Replies

3. Shell Programming and Scripting

Filtering Multiple variables from a single column

Hi, I am currently filtering a file, "BUILD_TIMES", that has multiple column of information in it. An example of the data is as follows; Fri Nov 5 15:31:33 2010 00:28:17 R7_BCGNOFJ_70.68 Fri Nov 5 20:57:41 2010 00:07:21 R7_ADJCEL_80.6 Wed Nov 10 17:33:21 2010 00:01:13 R7_BCTTEST3_80.1X... (7 Replies)
Discussion started by: crunchie
7 Replies

4. Shell Programming and Scripting

Reading a single character from each line of the file

Hi, I should read one character at a fixed position from each line of the file. So how ??? should be substituted in the code below: while read line ; do single_char=`???` echo "$single_char" done < $input_file (8 Replies)
Discussion started by: arsii
8 Replies

5. Shell Programming and Scripting

How to avoid the truncating of multiple spaces into a single space while reading a line from a file?

consider the small piece of code while read line do echo $line done < example content of example file sadasdasdasdsa erwerewrwr ergdgdfgf rgerg erwererwr the output is like sadasdasdasdsa erwerewrwr ergdgdfgf rgerg erwererwr the... (4 Replies)
Discussion started by: Kesavan
4 Replies

6. Shell Programming and Scripting

Multiple lines in a single column to be merged as a single line for a record

Hi, I have a requirement with, No~Dt~Notes 1~2011/08/1~"aaa bbb ccc ddd eee fff ggg hhh" Single column alone got splitted into multiple lines. I require the output as No~Dt~Notes 1~2011/08/1~"aaa<>bbb<>ccc<>ddd<>eee<>fff<>ggg<>hhh" mean to say those new lines to be... (1 Reply)
Discussion started by: Bhuvaneswari
1 Replies

7. Shell Programming and Scripting

How to ignore single or multiple lines between /* and */ while reading from a file in unix?

I have a file proc.txt: if @debug = 1 then message 'Start Processing ', @procname, dateformat(now(*), 'hh:mm:ss'), @julian type info to client; end if; /* execute immediate with quotes 'insert into sys_suppdata (property, value, key_name) location ''' || @supp_server || '.' ||... (5 Replies)
Discussion started by: kidncute
5 Replies

8. Shell Programming and Scripting

Reading of variable in a single line command

Hi All, Below is a sample command that I can run without any problem in the command line. Command Line dtToday=`date +%Y%m%d`; ls -ltr ./filename_${dtToday}.txt -rw-r--r-- 1 monuser oinstall 0 Jan 18 11:02 ./filename_20130118.txt But once I put that command line in file (list.txt) and... (3 Replies)
Discussion started by: padi
3 Replies

9. Shell Programming and Scripting

Reading multiple values from multiple lines and columns and setting them to unique variables.

Hello, I would like to ask for help with csh script. An example of an input in .txt file is below, the number of lines varies from file to file and I have 2 or 3 columns with values. I would like to read all the values (probably one by one) and set them to independent unique variables that... (7 Replies)
Discussion started by: FMMOLA
7 Replies

10. UNIX for Dummies Questions & Answers

Reading multiple variables in a loop

Hi, I managed to read and print variable as shown in the below code. table_name=table1,table2,table3 i=0 IFS="," for i in $table_name do echo $i done Is there a way how I can read more than one variable. For example I need to read 2 variables and populate the output... (6 Replies)
Discussion started by: shash
6 Replies
BACKUPNINJA(1)							backupninja package						    BACKUPNINJA(1)

NAME
BACKUPNINJA - A lightweight, extensible meta-backup system "a silent flower blossom death strike to lost data." SYNOPSIS
backupninja [ -h ] [ -d ] [ -n ] [ -t ] [ -f filename ] [ --run filename ] DESCRIPTION
Backupninja allows you to coordinate system backups by dropping a few simple configuration files into /etc/backup.d/. Most programs you might use for making backups don't have their own configuration file format. Backupninja provides a centralized way to configure and coor- dinate many different backup utilities. FEATURES
- easy to read ini style configuration files. - you can drop in scripts to handle new types of backups. - backup actions can be scheduled. - you can choose when status report emails are mailed to you (always, on warning, on error, never). - console-based wizard (ninjahelper) makes it easy to create backup action configuration files. - passwords are never sent via the command line to helper programs. - in order to backup a db or sql database, you cannot simply copy database files. backupninja helps you safely export the data to a format which you can backup. - works with Linux-Vservers. Backup types include: - secure, remote, incremental filesytem backup (via rdiff-backup). incremental data is compressed. permissions are retained even with an unpriviledged backup user. - basic system and hardware information. - encrypted remote backups (via duplicity). - safe backup of MySQL, PostgreSQL, OpenLDAP, and subversion databases. - burn CD/DVDs or create ISOs. OPTIONS
-h, --help Show summary of options -d, --debug Run in debug mode, where all log messages are output to the current shell. -f, --conffile CONF_FILE Use CONF_FILE for the main configuration instead of /etc/backupninja.conf -t, --test Run in test mode, no actions are actually taken. -n, --now Perform actions now, instead of when they might be scheduled. --run ACTION_FILE Runs the action configuration ACTION_FILE and exits. CONFIGURATION
General settings are configured in /etc/backupninja.conf. In this file you can set the log level and change the default directory loca- tions. See backupninja.conf(5). To preform the actual backup actions, backupninja processes each action configuration file in /etc/backup.d according to the file's suffix. See backup.d(5). EXAMPLE USAGE
Backupninja can be used to implement whatever backup strategy you choose. It is intended, however, to be used like so: First, databases are safely copied or exported to /var/backups. Often, you cannot make a file backup of a database while it is in use, hence the need to use special tools to make a safe copy or export into /var/backups. Then, vital parts of the file system, including /var/backups, are nightly pushed to a remote, off-site, hard disk (using rdiff-backup). The local user is root, but the remote user is not privileged. Hopefully, the remote filesystem is encrypted. In order for this to work (ie for diff-backup to run unattended), you must create ssh keys on the source server and copy the public key to the remote user's authorized keys file. For example: root@srchost# ssh-keygen -t rsa -b 4096 root@srchost# ssh-copy-id -i /root/.ssh/id_dsa.pub backup@desthost Now, you should be able to ssh from user 'root' on srchost to user 'backup' on desthost without specifying a password. When prompted for a password by ssh-keygen, just leave it blank by hitting return. The "wizard" ninjahelper(1) will walk you through these steps. FILES
/usr/sbin/backupninja main script /etc/backupninja.conf main configuration file; general options /etc/cron.d/backupninja runs main script hourly /etc/logrotate.d/backupninja rotates backupninja.log /etc/backup.d directory for configuration files /usr/share/backupninja directory for handler scripts /usr/share/doc/backupninja/examples example action configuration files. SEE ALSO
ninjahelper(1), backupninja.conf(5), backup.d(5), AUTHOR
BACKUPNINJA was written by the riseup.net collective. riseup October 10, 2005 BACKUPNINJA(1)
All times are GMT -4. The time now is 07:36 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy