How can we assign value to an array variable from an external file? Post: 302669199

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Can I assign the contents of file into an array?

I am trying to assign the contents of file e.g ls "$HOME" into an array. If it is possible then please guide me without using the concept of awk,sed, and perl16 Thanks

2. Shell Programming and Scripting

Assign dscl output to variable as an array

Greetings folks, I am trying to assign the output of a dscl command (contains name<spaces>id) to a variable as an array. Currently I am piping the output into a tmp file, then reading the tmp file into an array, then parsing the array. I would like to bypass creating the tmp file portion of...

3. Shell Programming and Scripting

How to assign a variable to an array

I want to ask the user to enter an X amount of file names. I want to put those names into an array and then loop back through them to verify they are in the directory. 1st- How would I assign the value to an array and what is the correct syntax. 2nd- how would i reference that array after I...

4. Shell Programming and Scripting

assign value to array variable

Hi, I have a piece of code as follows: i=0 while read LINE do var = "$LINE" i=$((i+1)) echo "${var}" done < file I want to assign value to the array var. However, when i execute the script i get a error. Please can you help me know what i am missing. I ultimately want to...

5. Shell Programming and Scripting

How to assign an array element to a variable

Hi every one.. I'm new to shell scripting... I would like to assign a single array element to a variable... Is it possible to do it.... Could any body help me....

6. Shell Programming and Scripting

Assign value to external variables from awk

Hello I have a text file with the next pattern Name,Year,Grade1,Grade2,Grade3 Name,Year,Grade1,Grade2,Grade3 Name,Year,Grade1,Grade2,Grade3 I want to assign to external variables the grades using the awk method. After i read the file line by line in order to get the grades i use this ...

7. Shell Programming and Scripting

using an awk internal variable as parameter for an external array

Hello, I am running a bash script under linux which first defines an CA-array like j=0 num1=120.00 num2=10.00 until do CA='echo $num1 + $j*$num2' j=$ done within the later awk section of this same script I want to read data from a file. If the value of the second column is...

8. Shell Programming and Scripting

how to assign file names to array variable?

I wish to assign file names with particular extention to array variables. For example if there are 5 files with .dat extention in /home/sam then i have to assign these 5 files to an array. plz help me how to accomplish this. Thanks in advance.

9. Shell Programming and Scripting

Assign variable value from file to another with the same name

Hi All, I need to read two config files in a shell script. In that I need to assign a value from one config file to another. I 'm using bash. config_env.txt prefix=tab_ config_properties.txt table_name=${prefix}account So, when I read these two files in a shell script, I need...

10. UNIX for Beginners Questions & Answers

How To Read a File and Assign the line values to an Array?

i have this basic code that i wrote to read a file and place it's values to an array. the source/input file will have multiple strings on it that is separated by a whitespace. sample_list.txt file contents: ACCT1 TABLE1 ACCT2 TABLE2 ACCT3 TABLE3 script file: sample_list.sh ...

LEARN ABOUT LINUX

runlevel

runlevel(8)						      System Manager's Manual						       runlevel(8)

NAME

       runlevel - output previous and current runlevel

SYNOPSIS

       runlevel [OPTION]...  [UTMP]

DESCRIPTION

       runlevel  reads	the  system UTMP file, which defaults to /var/run/utmp when no alternate filename is given, to locate the most recent run-
       level record.

       The previous and current runlevel from that record are output separated by a single space.  If there is no previous runlevel in the record,
       the letter N will be substituted.

       If no runlevel record can be found, runlevel outputs the word unknown and exits with an error.

       During  system  boot,  the  environment variables RUNLEVEL and PREVLEVEL will be set by the init(8) daemon, these come from the runlevel(7)
       event generated by telinit(8) or shutdown(8).

       When these environment variables are set, runlevel will output the values from these instead.  Thus runlevel can be used in rc scripts as a
       replacement for the System-V who(1) -r command.

OPTIONS

       --quiet
	      Does  not  output the current and previous runlevel, nor does it output unknown in the case of error (but it will exit with an error
	      code).

	      This may be used to test for the presence of a runlevel entry, or to check for errors reading from the file.

EXIT STATUS

       runlevel will exit with status 0 if a UTMP record was found, otherwise it will exit with status 1.

ENVIRONMENT

       RUNLEVEL
	      runlevel will read the current runlevel from this environment variable if set in preference to reading from /var/run/utmp

       PREVLEVEL
	      runlevel will read the previous runlevel from this environment variable if RUNLEVEL
	       was given, in preference to reading from /var/run/utmp

FILES

       /var/run/utmp
	      Where the current and previous runlevels will be read from.

NOTES

       The Upstart init(8) daemon does not keep track of runlevels itself, instead they are implemented entirely by its userspace tools.

       A change of runlevel is signalled by the runlevel(7) event, generated by either the telinit(8) or shutdown(8) tools.  This  event  includes
       the  new  runlevel  in  the  RUNLEVEL  environment  variable, as well as the previous runlevel (obtained from their own environment or from
       /var/run/utmp) in the PREVLEVEL variable.

       As well as generating the event, both tools write the new runlevel back to /var/run/utmp and append a new entry to /var/log/wtmp.

AUTHOR

       Written by Scott James Remnant <scott@netsplit.com>

REPORTING BUGS

       Report bugs at <https://launchpad.net/upstart/+bugs>

COPYRIGHT

       Copyright (C) 2009 Canonical Ltd.
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

SEE ALSO

       runlevel(7) init(8) telinit(8) shutdown(8) who(1)

Upstart 							    2009-07-09							       runlevel(8)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Can I assign the contents of file into an array?

Discussion started by: murtaza

2. Shell Programming and Scripting

Assign dscl output to variable as an array

Discussion started by: macnetdaemon

3. Shell Programming and Scripting

How to assign a variable to an array

Discussion started by: tvb2727

4. Shell Programming and Scripting

assign value to array variable

Discussion started by: sunrexstar