How to change string variable in awk? for example, I parse with awk script text file named some_name_with_extension.txt
I want to print only some_name in my script
Code:
....
varCompName = FILENAME
print varCompName
How to put not all symbols from FILENAME to variable?
This make my day
In windows I used some of next
Code:
%my_var:~0,-2%
would extract all but the last 2 characters of the my_var variable.
How to change string variable in awk? for example, I parse with awk script text file named some_name_with_extension.txt
I want to print only some_name in my script
Code:
....
varCompName = FILENAME
print varCompName
How to put not all symbols from FILENAME to variable?
[Code].....
my script has a variable which comes in the form +00.00 +0.00 -00.00 or -0.00 (the numbers can be any in that form) for any that have a + symbol I need to remove the +, but if it has a - symbol it needs to stay.
i need to make a new variable with the string from the old variable btut without any plus sign. I have tried a lot of different ways with no success, each thing I tried either left the + or removed the entire string. I think this should work but doesn't
foo=+12.40
bar=${foo#+}
copy string a to string b and change string b with toupper() and count the chars
View 3 Replies View RelatedI'm facing problems in developing the script as there are errors that sometimes i dun have any idea on how to solve it.What i'm doing now is not homework, but i had been assigned to develop some system in linux.
My problem currently is on sub-string matter, where i need to read the line from file/directory and based on the line retrieved,i need to seperate the information in the line and assign as variable..
Below are my script:
Thus, the output something like this: file_name successfully ran on Mon Jul 12 23:15:00 SST 2009.
Now, what i need to do is to extract certain information from that line which is the name, date, time and the status
The desired output is:
So,my next step is to identify the sub-string and assigned as variable first in order to parse the info and output it.
Thus,my script is:
But i received error message which is:
How do i convert variable to string?
For example:
So how do i make the code with variable work?
I am bad with bash programming and I need some help how I can make variable names out of a string.I will need some help start doing that. And I think the first would be to get part of the filenames strings into variables.
View 7 Replies View RelatedI have a program that loops over each word in a sentence. I need to append a constant to the beginning and end of each word. It works up until the last word on the line.
Code:
Output:
Here is the code:
Code:
How ever when I run this script I get the following error
Quote:
I just don't get it, I have racked my brain trying to figure out every combination of how I should write this if statement and I can't get it to work.
I'm trying to pass a path as a string to an array, but its evaluating it as a command instead. I want to take the literal string "/mnt/accounts/user/temp/*.jpg" and assign it to an array{1}, but when i echo the array variable, it displays it as
pic1.jpg
pic2.jpg
pic3.jpg
[code]....
I just want it to be the actual text "/mnt/accounts/user/temp/*.jpg" which i will be combining with other text to create a longer path elsewhere in the code.
The script produces 2 empty lines and I don't know why.
View 1 Replies View RelatedI do this:
Code:
a@b:~$ export A=hi
a@b:~$ echo $A
hi
a@b:~$ bash -c "export A=blah; echo $A"
hi
a@b:~$
Why doesn't the bash command print the new value of $A? Is there a way to make it do so?
I have a file (.tmpfile) and inside it is a string which i only know part of, the rest being a random group of characters... I would like to know how to pull the whole string out of the file and into a variable.
View 13 Replies View RelatedI want to match some filename in some text, but the filenames I have no control of, so "[" can "]" can appear in the filenames.so do I always have to use sed to addslashes to these variables before I have to grep them? and what other characters have I missed other than "[", "]", "."?
View 4 Replies View RelatedI want to append a variable string to the end of a specific line. not like append the same string to each line. like in my file i have 4 columns, i want to add a string in 5th column in some fixed row.
View 4 Replies View RelatedBash 3.1.7
Code:
Code:
Code:
I think read A1 A2 makes A1, A2 string variables. Then, when A2 gets the value 01, '01' should be a string. But for some reason bash takes it as numeric. I know there are no types in bash.
how do you include a string variable as part of a regex in Perl?
View 5 Replies View Related(variable substitution?)
(parameter expansion?)
Code:
run_repeatedly()
{
NUM=0
while [ <irrelevant stuff here> ]
[Code]....
run_repeatedly "programX -o "./messy/path/output-$NUM.txt"" The echo inside the loop prints "...-$NUM.txt"; obviously I'm aiming to have bash substitute the iteration number so that I end up with many output files not 1.
I need to search a text file for a string of numbers which are different lengths, and always are between number=" and " like:
number="1234567890"
number="22390"
I need to grab those numbers and pipe each one to a line in a file. I've already tried something with awk and that didn't seem to work.
My script.
This is may script:
Code:
Problem: Output file doest not exclude the values in grep -av
How can I change the MAX address string using sed. What I need is to add or subtract number from MAC address, e.g.
Input string:
ethaddr=00:21:04:4D:BB:00
Output string
ethaddr=00:21:04:4D:BB:05
I'm not experienced with sed.
I was doing a preupgrade from f12 to f13. That was interrupted by a power cut. When I tried to redo it by booting from the grub option, it failed (can't remember the error). I then re-ran preupgrade, but got the "the root for the previously installed system was not found" error even though the UUID was correct and even when I referenced the partion by device - /dev/sda14.
So I decided to go old school:
1. yum update
2. change the repos manually to reference f13
3. yum update
So as it stands these are seemingly the only remaining f12 packages
Code:
But i am guessing due to the interrupted preupgrade, the releasever variable has not been updated. How can I manually do that?
I am about to move my scripts to the next generation level, so I need some help I am stuck in varying my variable names in a loop. For example:
for user in ben dorothy mike pat
do
[ -r /home/$user ] && let "$user"check=1 || let "$user"check=0
[code]...
I was changing my sudoers file to give permission of using "sudo" command to all root commands, asking for the password. It works, it's fine. The problem I'm having is with the variable PATH to my user, I think.
In terminal:
normal user:
Code:
ataias@ataias-notebook:~/Downloads$ echo $PATH
/usr/local/bin:/bin:/usr/bin
super user:
Code:
root@ataias-notebook:~# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/usr/sbin:/bin:/usr/bin
As many commands are in /sbin/, root can use them without writing "/sbin/" but I can't do the same cause it's not in my path.
while root do this:
Code:
shutdown -h now
I should do:
Code:
sudo /sbin/shutdown -h now
and I want to use only
Code:
sudo shutdown -h now
I want to change my user's path variable to make it equal to root's path. how to change it? I don't know many things of shell still.
I want to add my current working directory to the PATH variable and make it permanant in my .bash_profile so I can run my testscript without using the ./ charactors.can this be done?
View 5 Replies View RelatedIs there any inbuilt functionality in Unix shell script so that i can able to convert lower case string input to an upper case? I dont want to use high level languages like java,python or perl for doing the job.
View 4 Replies View RelatedI want to display 4 options using the case command and refresh the screen when options 1 and 2 are chosen (no changes to the options and you get asked again to chose option), but give a message for option 3 and exit on option 4. I set this up with the script below, but choosing option 1 works and choosing option 2 exits the script.
Code:
#!/bin/bash
#testing options
Option="0"
[code]....
I'm mainly asking beforehand so I won't have to shoot myself in the head twenty minutes from now. I suppose I'll find/figure out one way or the other anyway . Can I just source the 32dev.sh and then run sbopkg -i if the source for the package I want to create isn't 64bit capable? I might need to change the $ARCH variable to x86_64 too, right?
View 1 Replies View RelatedI am using Ubuntu-10.4 and postgresql-8.4.Now I have to change my SHMMAX variable for performance tuning.I have 16 GB.change it permanently and what is the suitable value for the DATABASE Server.
View 1 Replies View RelatedI would like to put a variable in the $PS1 prompt that will change each time a command is run. I want the color of the $PS1 prompt to change each time a command is run.I know that I can do this:
Code:
PS1="h@w # "
## "#" is changes every time a command is run
[code]....