cloud engineer
by Ulysses
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
by Ulysses
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
by Ulysses
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
by Ulysses
Find the biggest files in the current directory. Sort by from large to small. Display only the top 20. Display in human readable format.
find -type f -exec du -Sh {} + | sort -rh | head -n 20 |
find -type f -exec du -Sh {} + | sort -rh | head -n 20
by Ulysses
Find out which files or directories are using up disk resources.
# display the biggest files find -type f -exec du -Sh {} + | sort -rh | head -n 5 # display the biggest directories du -Sh | sort -rh | head -5 |
# display the biggest files find -type f -exec du -Sh {} + | sort -rh | head -n 5 # display the biggest directories du -Sh | sort -rh | head -5