I tried to start mongodb service from root user and it fails on the error that it cannot open file j._8, I checked the permissions as well. This was working fine before. This is the journal folder. I cannot open the file j._8 with cat or less as root. Please help to fix this. Thanks in advance Answer solved t…
Tag: linux
How to run LibSVM Classifier with 10 fold cross validation from Weka from Linux commandline?
I have installed Weka 3.7.12 on a linux machine with only commandline interface. I have downloaded the LibSVM.jar file as well and copied it in the same directory. How can I run the libsvm with 10 fold cross validation from the commandline in a similar way as in java weka.classifiers.trees.RandomForest -I 100…
Jenkins adding single quotes to bash shell script
My shell script looks like this: It’s checked into cvs in a shell folder, Jenkins is configured to execute it on a Linux machine via a job with ‘Execute Shell’ build step: But Jenkins is wrapping the whole sudo line in single quotes which results in my log files not been deleted (although th…
deletion of file after 7 days
I have to delete multiple files after 7 days regularly. And the deletion dates and location are different for each file.Yes, I can apply a cronjob for each folder separately but tat will involve many cronjobs (atleast 15). In order to avoid this, I want to create a script which will go to each folder and dele…
searching through text file in terminal
Hi this might be a basic question for many, but it has however managed to eat a couple of hours of my time. I have large data file as an output from running a script. The file contains around 15 columns and around 100,000 rows. I wish to search through the file and in columns 4,5,6,7 and 8 check for
Difference on bash and ash parentheses
I was trying to use a diff command for comparing directory listings which works fine in bash: However, on the ash (embedded device where no other shell is available) I get Is there any difference regarding reading input operator < or parentheses ( )? Answer Don’t confuse the angle bracket in <( … …
find and remove all closed files that are not modified in some-time
I’m building a script in linux that will remove files from the disc that aren’t in used currently by the OS. I want to use find command so I can execute rm for all the files that I find that are not open. I tried so far this command without success: I found this command in some website it supposed
Commit data in a mysql container
I created a mysql container using the officially supported mysql image. I ran the image mounting a folder that contains a sql dump, then I created a new database in the container and imported the .sql dump in it: Then I listed the running containers to get that container’s id: Then, I commited the conta…
How to create VM instance in Google Compute Engine?
I am new to Google Compute Engine. I want to create a Web Server having following properties: 1 Core Red Hat Enterprise Linux 7.1 64 bit RAM 8 GB HDD: 100 GB SSH, JDK 1.7 Apache Web server as the proxy to Jboss App Server Enable HTTP / 80 and HTTPS /443 on public IP Access Mode – SSH/SCP I
How to grep a string in a program?
Description: The str_buf_to_grep is given in any way, which might be the content of a text file, and might be very long and complex, even contains special characters, such as |, “, etc. I want to use the grep command to find matched lines, and the patterns might be very complex. How should I implement i…