omar-yassin

## incomplete; just a guide so I can remember

$log_file
last_length = `cat /tmp/${log_file}_last_length`
current_legnth = 'wc -c $log_file'

if [[ $last_file_length > 0 ]] ; then
	diff_length = current_length - last_length
	if [[ diff_length >= 0 ]] ; then

omar-yassin

sc.exe config $ServiceName start= "delayed-auto"

omar-yassin

# load xml
[xml]$xml = `what evber out put that prints xml - or can load xml from file path`

# read xml contents
$xml.nodeName.ChildNodes

omar-yassin

$path = 'C:\omar\Web.config'
$xml = [xml](Get-Content $path)
$UseWebResourceCDN=$xml.configuration.appSettings.add | where {$_.key -eq 'UseWebResourceCDN'}
$UseWebResourceCDN.Value = 'True'
$xml.save($path)

omar-yassin

# prints stdout and logs to file 
function logger ()
{
	echo "${1}" | tee -a $LOG_FILE
}

# function to wrap errors and exit
# USAGE: rc=${PIPESTATUS[0]} ; check_return_value
rc=0
function check_return_value

omar-yassin

sed ':a;N;$!ba;s/\n/\\n/g'

omar-yassin

# email using aws ses
function send-email ()
{
    email_message="/tmp/email_message"
    email_cleanup="/tmp/email_cleanup"
email_destination="/tmp/email_destination"

# we need to clean up our logs so we can send via json; remove new line and quotes
# and I don't understand the bash issue with running cat | sed in the $email_message declaration. Fun TODO to understand why?
cat $LOG_FILE | sed ':a;N;$!ba;s/\n/\\n/g' | tr -d '"' > $email_cleanup

omar-yassin

select key/value
aws --profile xxx --output json ec2 describe-instances --instance-ids i-xxxxxx | jq -r '.Reservations[].Instances[].Tags[] | select(.Key | contains("computername")) | .Value' 

omar-yassin

# REMEMBER TO USE VISUDO - you can potentially lock yourself out if sudoers file has parse error

# change visudo editor to VIM
Defaults        editor=/usr/bin/vim

# example of /etc/sudoers.d/lbbackup

Cmnd_Alias LS_HARDWARE = /usr/bin/lshw
Cmnd_Alias MOUNT_UDF = /bin/mount -oloop\,rw *
Cmnd_Alias UNMOUNT_UDF = /bin/umount /data/TEMP_UDF_DIR/MOUNT_UDF

omar-yassin

# ON SERVER: 
1. install chef-server
2. intialize new chef instance `sudo chef-server-ctl reconfigure`