Hi,
Is it possible to create a dynamic array in shell script. I am trying to get the list of logfiles that created that day and put it in a dynamic array. I am not sure about it. help me
New to scripting
Gundu (3 Replies)
Hi all,
i am quite fimiliar with shell scripting but i wouldn't regard myself as a semi professional at it.
I am trying to create an array variable to read in 4 lines from a file using head and tail command in a pipeline and store each line into each array. I have done the scripting in unix... (2 Replies)
i want to create an array
the array elements are populated depending upon the number of entries present in a data file
The data file is created dynamically
how to achieve the same
thanks (1 Reply)
I am facing a strange error while creating posix threads:
Given below are two snippets of code, the first one works whereas the second one gives a garbage value in the output.
Snippet 1
This works:
--------------
int *threadids;
threadids = (int *) malloc (num_threads * sizeof(int));
... (4 Replies)
I am wondering how I can save the file names (stored in $file or $fnames) in array which I can access with an index.
alias MATH 'set \!:1 = `echo "\!:3-$" | bc -l`'
set narg = $#argv
while ($iarg < $narg)
MATH iarg = $iarg + 1
set arg = $argv
set opt = ` echo $arg | awk... (1 Reply)
I have an interesting requirement. I have declaried an array like :-
arr=`find . ! -name "." | xargs -I {} echo {} | cut -c 2-${#}`
Then i will try to access the array elements like :-
i=0
for i in ${arr}; do
Here comes the confusions, the array elements are basically dir and files stored... (2 Replies)
Hi gurus,
I need to create arrays from variables, via a loop.
The issue I have is with the array name creation. How do I use a variable to define an array?
I want to do something like
declare -a $H
where $H is my loop variable.
I then need to add items to each array I've created,... (3 Replies)
I am having trouble creating an array, I've tried everything google gives me but it won't work, and it seems as though it should. Using Ubunto 12.04 and bash.
#!/bin/bash
ARRAY=one two three
echo ${ARRAY}When I do this I receive the error
: two: not found
and
: Bad substitution
When I... (3 Replies)
Dear community,
how can I create an array from file taking only the 4th field?
out.txt file is something like this:
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
17 18 19 20So the final array should be:
4 8 12 16 20With this command I created an array with all the fields, but I need only the 4th... (13 Replies)
Hi Guys,
I am writting a c shell script where I have to parse an input argument with options that could be an array. So far I have achieved where I could parse a single argument with option but failed when I try to create an array with the options. For example:
This is on terminal window:... (2 Replies)
Discussion started by: dixits
2 Replies
LEARN ABOUT DEBIAN
environment.d
ENVIRONMENT.D(5) environment.d ENVIRONMENT.D(5)NAME
environment.d - Definition of user session environment
SYNOPSIS
~/.config/environment.d/*.conf
/etc/environment.d/*.conf
/run/environment.d/*.conf
/usr/lib/environment.d/*.conf
/etc/environment
DESCRIPTION
The environment.d directories contain a list of "global" environment variable assignments for the user environment. systemd-environment-d-
generator(8) parses them and updates the environment exported by the systemd user instance to the services it starts.
It is recommended to use numerical prefixes for file names to simplify ordering.
For backwards compatibility, a symlink to /etc/environment is installed, so this file is also parsed.
CONFIGURATION DIRECTORIES AND PRECEDENCE
Configuration files are read from directories in /etc/, /run/, and /lib/, in order of precedence. Each configuration file in these
configuration directories shall be named in the style of filename.conf. Files in /etc/ override files with the same name in /run/ and
/lib/. Files in /run/ override files with the same name in /lib/.
Packages should install their configuration files in /lib/. Files in /etc/ are reserved for the local administrator, who may use this logic
to override the configuration files installed by vendor packages. All configuration files are sorted by their filename in lexicographic
order, regardless of which of the directories they reside in. If multiple files specify the same option, the entry in the file with the
lexicographically latest name will take precedence. It is recommended to prefix all filenames with a two-digit number and a dash, to
simplify the ordering of the files.
If the administrator wants to disable a configuration file supplied by the vendor, the recommended way is to place a symlink to /dev/null
in the configuration directory in /etc/, with the same filename as the vendor configuration file. If the vendor configuration file is
included in the initrd image, the image has to be regenerated.
CONFIGURATION FORMAT
The configuration files contain a list of "KEY=VALUE" environment variable assignments, separated by newlines. The right hand side of these
assignments may reference previously defined environment variables, using the "${OTHER_KEY}" and "$OTHER_KEY" format. It is also possible
to use "${FOO:-DEFAULT_VALUE}" to expand in the same way as "${FOO}" unless the expansion would be empty, in which case it expands to
DEFAULT_VALUE, and use "${FOO:+ALTERNATE_VALUE}" to expand to ALTERNATE_VALUE as long as "${FOO}" would have expanded to a non-empty value.
No other elements of shell syntax are supported.
Each KEY must be a valid variable name. Empty lines and lines beginning with the comment character "#" are ignored.
Example
Example 1. Setup environment to allow access to a program installed in /opt/foo
/etc/environment.d/60-foo.conf:
FOO_DEBUG=force-software-gl,log-verbose
PATH=/opt/foo/bin:$PATH
LD_LIBRARY_PATH=/opt/foo/lib${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}
XDG_DATA_DIRS=/opt/foo/share:${XDG_DATA_DIRS:-/usr/local/share/:/usr/share/}
SEE ALSO systemd(1), systemd-environment-d-generator(8), systemd.environment-generator(7)systemd 237ENVIRONMENT.D(5)