cloud engineer
How to find a boot disk from an instance.
gcloud compute instances describe servername \ --format='get(disks[0].source)' \ --zone=us-central1-c \ --project project-id |
gcloud compute instances describe servername \ --format='get(disks[0].source)' \ --zone=us-central1-c \ --project project-id
Result
https://www.googleapis.com/compute/v1/projects/project-id/zones/us-central1-f/disks/servername-boot |
https://www.googleapis.com/compute/v1/projects/project-id/zones/us-central1-f/disks/servername-boot
Here’s a simple sed command to replace multiple spaces into a comma delimited file.
sample.txt
one two three four |
one two three four
The sed command.
sed 's/ \+ /,/g' sample.txt > sample2.txt |
sed 's/ \+ /,/g' sample.txt > sample2.txt
sample2.txt
one,two three,four |
one,two three,four
Get a count of the number of files in a directory.
# using ls ls | wc -l ls -Aq | wc -l # include hidden files find . ! -name . -prune -print | grep -c / find .//. ! -name . -print | grep -c // # using tree if installed. yum install tree. apt-get install tree tree |
# using ls ls | wc -l ls -Aq | wc -l # include hidden files find . ! -name . -prune -print | grep -c / find .//. ! -name . -print | grep -c // # using tree if installed. yum install tree. apt-get install tree tree