01) I am trying to use the && operator in a for loop as shown below in the script. However this does not seem to work. I was not able to see the error generated in the terminal window, since it closes as soon as it runs in to an error. Could someone please tell me what I'm doing wrong?
#!/bin/bash
cd ~/Documents/DTI/
#subj and subj1 contain folders which are located in the DTI directory
subj="ARN MT"
subj1="ARNpre1 ARNpre2"
for [[s in $subj] && [s1 in $subj1]]
02) And as you can see in my "subj1", the first two entries start with the letters ARN which means that they are sub directories of ARN(located in a different place.Not in ARN main directory). So I also want to run a command in which, if subj1 contains subj then it must perform a certain command.For this purpose I wrote the following,
if [[ ${s1} == *"${s}"* ]];then
would this be the right way to do such operation?
I would greatly appreciate any help.
Thank you in advance.
I think by for [[s in $subj] && [s1 in $subj1]] you mean this:
for s in $subj; do
for s1 in $subj1; do
# do something
done
done
By nesting the for loops you'll loop through every possible combination of s and s1, which sounds like what you're trying to do in part 1 of your question.
However, I can't make sense of what you're talking about in part 2, so I can't help you there.
Related
I am currently working on a small command line interface tool that someone not very familiar with bash could run from their computer. I have changed content for confidentiality, however functionality has remained the same.
The user would be given a prompt
the user would then respond with their answer(s)
From this, I would be given two bits of information:
1.their responses now as individual variables
2.the number of variables that I have now been given: this value is now a variable as well
my current script is as follows
echo List your favorite car manufacturers
read $car1 $car2 $car3 #end user can list as many as they wish
for n in {1..$numberofmanufacturers} #finding the number of
variables/manufactures is my second question
do
echo car$n
done
I am wanting to allow for the user to enter as many car manufacturers as they please (1=<n), however I need each manufacturer to be a different variable. I also need to be able to automate the count of the number of manufacturers and have that value be its own new variable.
Would I be better suited for having the end user create a .txt file in which they list (vertically) their manufactures, thus forcing me to use wc -l to determine the number of manufacturers?
I appreciate any help in advance.
As I said in the comment, whenever you want to use multiple dynamically created variables, you should check if there isn't a better data structure for your use case; and in almost all cases there will be. Here is the implementation using bash arrays. It prints out the contents of the input array in three different ways.
echo List your favorite car manufacturers
# read in an array, split on spaces
read -a cars
echo Looping over array values
for car in "${cars[#]}"
do
echo $car
done
echo Looping over array indices
for i in ${!cars[#]}
do
echo ${cars[$i]}
done
echo Looping from 0 to length-1
let numcars=${#cars[#]}
for i in $(seq 0 $((numcars-1)))
do
echo ${cars[$i]}
done
I have no previous programming experience. I know this question has been asked before or the answer is out there but I, for the life of me, cannot find it. I have searched google for hours trying to figure this out. I am working on a Red Hat Linux computer and it is in bash.
I have a directory of files 0-500 in /directory/.
They are named as such,
/directory/filename_001, /directory/filename_002, and so forth.
After running my analysis for my research, I have a listofnumbers.txt (txt file, with each row being a new number) of the numbers that I am interested in. For example,
015
124
187
345
412
A) Run a command from the list of files the files from the list of numbers? Our code looks like this:
g09slurm filename_001.com filename_001.log
Is there a way to write something like:
find value (row1 of listofnumbers.txt) then g09slurm filename_row1value.com filename_row1value.log
find value (row2 of listofnumbers.txt) then g09slurm filename_row2value.com filename_row2value.log
find value (row3 of listofnumbers.txt) then g09slurm filename_row3value.com filename_row2value.log
etc etc
B) Move the selected files from the list to a new directory, so I can rename them sequentially, then run a sequential number command?
Thanks.
First, read the list of files into an array:
readarray myarray < /path/to/filename.txt
Next, we'll get all the filenames based on those numbers, and move them
cd /path/to/directory
mv -t /path/to/new_directory "${myarray[#]/#/filename_}"
After this... honestly, I got bored. Stack Overflow is about helping people who make a good start at a problem, and you've done zero work toward figuring this out (other than writing "I promise I tried google").
I don't even understand what
Run a command from the list of files the files from the list of numbers
means.
To rename them sequentially (once you've moved them), you'll want to do something based on this code:
for i in $(ls); do
*your stuff here*
done
You should be able to research and figure stuff out. You might have to do some bash tutorials, here's a reasonable starting place
I'm almost completely new to Linux programming, and Bash Scripts. I build an amateur radio AllStar node.
I'm trying to create a script that looks at a certain variable and based on that info decides if it should connect or not. I can use a command: asterisk -rx "rpt showvars 47168. This returns a list of variables and their current values. I can store the whole list into a variable that I define, in my test script I just called it MYVAR but I can't seem to only get the value of one of the variables that's listed.
I talked to someone who knows a lot about Linux programming, and she suggested that I try CONNECTED="${MYVAR[3]}" but when I do this, CONNECTED just seems to become a blank variable.
What really frustrates me is I have written programs in other programming languages, and I've been told Bash scripts are easy to learn, but yet I can't seem to get this.
So any help would be great.
how did you assigned your variable?
It seems to me that you want to work with an array, then:
#!/bin/bash
myvar=( $( asterisk -rx "rpt showvars 47168 ) )
echo ${mywar[3]} # this is your fourth element
echo ${#myvar[#]} # this is the total of element in your array
be careful that index in an array starts at 0
I'm currently working on a project where I search hundreds of files using findstr in the command line. If I find the string which I searched for, I want to proceed with this exact file (and the other ones that include my string).
So in my case:
I searched for the string WRI2016 by using:
H:\KOBINI>findstr "WRI2016" *.ini > %temp%\xx.txt && %temp%\xx.txt
To see what the PC does, I save it in a .txt file as you can see.
So if my file includes WRI2016 I want to extract some facts out of the file. In my case it is NR, Kunde, WebHDAktiv, DigIDAktiv.
But I just can't find a proper way to link both of these functions.
At first I simply printed all of the parameters:
H:\KOBINI>findstr "\<NR Kunde WRI2016 WebHDAktiv DigIDAktiv" *.ini > %temp%\xx.csv && %temp%\xx.csv
I also played around using the if command but that didn't really work out. I'm pretty new to this stuff as you'll see in my following tries to solve this problem:
H:\KOBINI>findstr "\<NR DigIDAktiv WebHDAktiv" set a =*.ini findstr "WRI2016" set b =*.ini if a EQU b > %temp%\xx.txt && %temp%\xx.txt
So all I wanted to achieve with that weird code was: if there is a WRI2016 in the file, give me the remaining parameters. But that didn't work out at all.
I also tried it with using new lines for every command which didn't change a thing.
As I want this to be a .csv in the end I want to add a semicolon between my parameters, any chance how I could do that? I've seen versions using -s";" which didn't do anything for me.
Sorry, I'm quite new and thought I'd give it a shot.
an example of my .ini files Looks like this:
> Kunde=Markt
> Nr=101381
> [...]
> DigIDAktiv=Ja
> WebHDAktiv=Nein
> Version=WRI2016_U2_P1
some files have a different Version though.
So I only want to know "NR, DigIDAktiv ..." if it's the 2016 Version.
As a result it should be sorted in a CSV, in different columns.
My Folder Looks like this
So I search These files in order to find Version 2016 and then try to extract my Information and put it into a .csv
I'd like to get some ideas from you on how to implement that. Let me explain a little bit my problem:
Scenario:
We have a system that must have some especific ACLs set in order to run it. So, before running it would be great if I could run a sort of pre check in order to verify if everything was set correctly.
Goal:
Create a script that checks those ACLs before starting the system alerting in case one of them is wrong based in a list of files/folder and its ACLs.
Problems:
Since the getfacl result is not a simple return, the only way I found to do such checking was parsing the result and analising each piece of it, that not as elegant as I'd like it could be.
I doubt many of you had to do something ACLs check but for sure you guys can contribute to my cause :)
Thanks everybody in advance
How about using Python module pylibacl
>>> import posix1e
>>> acl1 = posix1e.ACL(file="file1.txt")
>>> print acl1
user::rw-
group::r--
other::r--
Since the getfacl result is not a simple return, the only way I found to do such checking was parsing the result and analising each piece of it, that not as elegant as I'd like it could be.
What exactly are you trying to do? If you're just comparing the result of calling getfacl to a desired ACL, it should be easy. For example, assuming that you have stored your desired ACL in a file named acl-i-want, you could do something like this:
getfacl /path > acl-i-have
if ! diff -q acl-i-have acl-i-want; then
echo "ACLs are different."
fi