This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
[Unit] | |
Description=Demonstrate Bash | |
[Service] | |
ExecStartPre=/usr/bin/bash -c "/usr/bin/systemctl set-environment MYVAR=$(( 2 + 2 ))" | |
ExecStart=/usr/bin/ech "2 + 2 = ${MYVAR}" |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/bin/bash | |
# simple function to check http response code before downloading a remote file | |
# example usage: | |
# if `validate_url $url >/dev/null`; then dosomething; else echo "does not exist"; fi | |
function validate_url(){ | |
if [[ `wget -S --spider $1 2>&1 | grep 'HTTP/1.1 200 OK'` ]]; then echo "true"; fi | |
} |