cloud engineer
Here’s how to determine what type of USB format a thumb drive is in Linux.
To display, use “fdisk -l” to display either NTFS, FAT32 or exFAT32.
Here’s my favorite Linux prompt.
PS1='\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ ' |
PS1='\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
Add to end of your .bashrc to make it permanent.
Here’s how to start multiple instances using Bash and Google SDK.
#!/bin/bash while IFS=', ' read -r a b c; do instance="${a//[[:blank:]]/}" project="${b//[[:blank:]]/}" zone="${c//[[:blank:]]/}" echo "Starting $instance ...." gcloud compute instances start $instance \ --zone $zone --project $project --async done < instance-list.txt |
#!/bin/bash while IFS=', ' read -r a b c; do instance="${a//[[:blank:]]/}" project="${b//[[:blank:]]/}" zone="${c//[[:blank:]]/}" echo "Starting $instance ...." gcloud compute instances start $instance \ --zone $zone --project $project --async done < instance-list.txt
Instances are read from an external file. The file format is displayed below.
server1,project1,us-central1-a server2,project2,us-central1-b server3,project3,us-central1-c |
server1,project1,us-central1-a server2,project2,us-central1-b server3,project3,us-central1-c
To stop multiple instances, replace “start” with “stop.”
Here’s how to check if instances are running in GCP.
#!/bin/bash while IFS=', ' read -r a b c; do instance="${a//[[:blank:]]/}" project="${b//[[:blank:]]/}" zone="${c//[[:blank:]]/}" gcloud compute instances describe $instance \ --zone $zone --project $project \ --format='table[no-heading](name,status,zone)' done < instance-list.txt |
#!/bin/bash while IFS=', ' read -r a b c; do instance="${a//[[:blank:]]/}" project="${b//[[:blank:]]/}" zone="${c//[[:blank:]]/}" gcloud compute instances describe $instance \ --zone $zone --project $project \ --format='table[no-heading](name,status,zone)' done < instance-list.txt
Instances are read from an external file. File is comma delimited with instance name, project id and zone data.
If you were running the older versions of Terraform, with release 0.12 and higher, there will be certain parts of your script that are no longer supported. Terraform uses expressions for dynamic configuration and dependencies. First-class expressions enable variables and operations to be performed outside of strings. In Terraform 0.11 and earlier all expressions were required to be part of interpolations in existing strings, such as “${var.foo}.
In Terraform 0.11.
resource "aws_instance" "example" { ami = "${var.ami}" instance_type = "${var.instance_type}" } |
resource "aws_instance" "example" { ami = "${var.ami}" instance_type = "${var.instance_type}" }
In Terraform 0.12.
resource "aws_instance" "example" { ami = var.ami instance_type = var.instance_type } |
resource "aws_instance" "example" { ami = var.ami instance_type = var.instance_type }
Gone are quotes, curly braces and the $ sign.