I want to run my VirtualBox after my I logged in. To do that, I have to check if it’s already running or not. If not, then start the VM. My problem is that I can not put the result of VirtualBox command into a variable in Bash. I’ve created a function to get the exit parameter, but I get
Check if line starts with digit then put those lines in a separate file using Bash
I would like to check in bash if line starts with digit then put those lines in a separate file. I tried ^[[0-9]] but it doesn’t work. Here is the code which I tried: Answer The correct operator to use regex in Bash script is =~. Moreoever you don’t need to double [ in range of characters. Try thi…
gocql package golang two file version in same install
getting this error when trying to run a go file (which should run) When I look at the documentation of go 1.7 I find that ClusterConfig does have a field ConnectTimeout. (go version = 1.7). If I go to the github.com directory in my go path I find a directory gocql. In this directory I find a file cluster.go w…
Wait for popen script to terminate in C
Is that possible with C to wait until the popen subprocess is finished? I have a script launched by a C daemon which will connect to a wifi network when an external signal is triggered. Here is my code for now : However, I’m not waiting for the subprocess to finish so when I’m closing the pipe, th…
/etc/fstab: parse error: ignore entry at line
I have scrip with function: After execution – mount returns me an error: root@xx255rs2sptry000001:~# mount -a mount: /etc/fstab: parse error: ignore entry at line 9. Same error if I’m trying to sed manually: I tried to close variables in “” – but no luck: echo “//$STORAGE_N…
ssh cronjob delete not working
I am new to SSH & cronjobs so probably I am doing something wrong. I am using a Google Cloud Engine for hosting my SSH Linux instance and I want to delete a snapshot by its name with a cronjob (I have also a create snapshot cronjob that works fine). So I wrote this script: This script should delete the
awk merged two files with 2 columns based on string character comparison
I am a beginner and my work starts to become difficult for me. I explain my problem. I have two tables File1 and File2 (reference table). I don’t have any identical column but I have some similarity between &2File1 and &2File2. File1 is from user and we want to standardize everything so I have a lot o…
How do I bring a Python script’s output to foreground/background in Linux?
I’m running a Python script on AWS (Amazon Linux AMI). The script is meant to run 24/7 and prints out to the interpreter or command terminal. It’s still in development, so I like to check to see how it’s behaving or if it’s stopped due to an error. But, I want to be able to close my ss…
Align/pad some content in these strings with regex in javascript
I have these strings: and i want to convert them to this: Want to do it with Regular Expressions in Javascript. NOTE 1: The goal is to align the data in the “fifth, sixth and seven column” from right to left. The fifth column has from 1 to 3 digits. The sixth column always has 1 digit, a dot and
Replace white spaces with underscores within a file (bash)
I am currently writing a script that accesses another file using “mapfile” to put it into an array. However, the inputted file contains some white spaces, which the script reads as a new array entry. How do I replace the white spaces with underscores within the body of the file I’m bringing …