I am trying to capture the total used memory in % on remote machine as the following so we add backslash as before the “$” as but still with the same errors any advice how to fix this syntax? Answer You also have to escape the double quotes “:
Tag: bash
How to send emails via cron job usng Golang MySQL?
Hope you all doing well. how can i using cron job and cron tab(by golang connection my sql) or anothor way using bash script excute (file golang) how can i do that. in crontab -e : set the code 31 17 * * * cd /home/shanaz/Desktop/GO export/home/shanaz/Desktop/GO:bash sql.sh when sql.sh code here go run sqll.g…
Sed to replace a speccificc part of line by argument in shell script based in line number
I have a script test.sh He has some arguments like : I made a while read loop to replace each specific part of a line (extractReplaceArgLine) with argument passed in shell script (Forest Cuba World Hello). Consider the file test.txt : So, the output would be : How can I do that ? Thanks ! Answer Use $1 to get
Why does bash go into an infinite loop?
I was trying out different ways of emulating a boolean variable in bash. One method is: which prints true and false respectively. Then I had a brain cramp and typed: expecting to see yes in the terminal. However, without the echo command, it went into an infinite loop printing y. Can someone explain what bash…
Extracting group from regex
I am new to using regex and having some issues understanding how to extract a group from a regular expression. I have a text file (example.txt): I am trying to extract the “5.2.1” only from the libpackage line and put it into a variable for a bash script. I have tried doing But it gives me the ent…
How to find all the files created today and modified anytime before 5 minutes?
Let’s say it is 10:00 am when the command is run, I need to list the files modified between midnight and 9:55 am. I have tried the following command which looks logical as per the documentation but it is pulling all the files since yesterday. Answer Since -daystart isn’t that portible, consider a …
How to install new relic on amazon linux
I have have unzipped newrelic files onto amazon linux and have both the installer.sh and config_defaults.sh I have the license key in the parameter store which I am able to call I install newrelic with the following command Where APPIKEY comes from the parameter store. However when I do sudo systemctl start n…
unzip a list of archives
I need to Unzipped a list of zip archives. These archives are not empty, in each one there are a lot of file. In my directory I have a lot of file zip archive and all have the the name in the same format: batch-download-ccd-1610959358275.zip but change only the numeric part. I can extract each archive with un…
How to search /var/log/dpkg.log for monthly install/upgrade logs and output to text file
I would like to output a file with install/upgrade logs limited to the past month by looking in /var/log/dpkg.log. I do not know bash, I know that the grep command could make it, but I still need some help. Answer Sample output:
Bash script : problem with my substraction
I would like to make a script that will calculate the difference of download time between two curl. For example with this command : My curl command will be run each day and I would like to make a substraction between the value of the day and the value of the previous day. For that, I will save the time_total