mattes

if _, err := os.Stat("/path/to/whatever"); os.IsNotExist(err) {
	// path/to/whatever does not exist
}

if _, err := os.Stat("/path/to/whatever"); !os.IsNotExist(err) {
	// path/to/whatever exists
}

treeherder

We have used the most recent beagleboard debian eMMC flasher image to flash the beagle bone black eMMC. As of this writing: wget http://debian.beagleboard.org/images/BBB-eMMC-flasher-debian-7.5-2014-05-14-2gb.img.xz After flashing is complete, erase the sd card, then reboot. Once booted, We can use fdisk -l to list our available devices, I found mine by checking the size and the partition table. After verfifying the card's address, we can reformat it to fit our needs. Of course, this can be done before plugging the card in, as well.

debian@beaglebone:~$ fdisk -l
Disk /dev/mmcblk0: 15.9 GB, 15931539456 bytes 
        Device Boot      Start         End      Blocks   Id  System
/dev/mmcblk0p1            8192    31116287    15554048    b  W95 FAT32

jniltinho

package main

/*
URL: https://github.com/mccoyst/myip/blob/master/myip.go
URL: http://changsijay.com/2013/07/28/golang-get-ip-address/
*/

import (
	"net"
	"os"

mobilemind

# delete local tag '12345'
git tag -d 12345
# delete remote tag '12345' (eg, GitHub version too)
git push origin :refs/tags/12345
# alternative approach
git push --delete origin tagName
git tag -d tagName

kendellfab

func readLine(path string) {
  inFile, _ := os.Open(path)
  defer inFile.Close()
  scanner := bufio.NewScanner(inFile)
	scanner.Split(bufio.ScanLines) 
  
  for scanner.Scan() {
    fmt.Println(scanner.Text())
  }
}

rxaviers

People

:bowtie:	😄 :smile:	😆 :laughing:
😊 :blush:	😃 :smiley:	☺️ :relaxed:
😏 :smirk:	😍 :heart_eyes:	😘 :kissing_heart:
😚 :kissing_closed_eyes:	😳 :flushed:	😌 :relieved:
😆 :satisfied:	😁 :grin:	😉 :wink:
😜 :stuck_out_tongue_winking_eye:	😝 :stuck_out_tongue_closed_eyes:	😀 :grinning:
😗 :kissing:	😙 :kissing_smiling_eyes:	😛 :stuck_out_tongue:

dergachev

# taken from http://www.piware.de/2011/01/creating-an-https-server-in-python/
# generate server.xml with the following command:
#    openssl req -new -x509 -keyout server.pem -out server.pem -days 365 -nodes
# run as follows:
#    python simple-https-server.py
# then in your browser, visit:
#    https://localhost:4443

import BaseHTTPServer, SimpleHTTPServer
import ssl

17twenty

# Find your micro SD card using lsblk - you're going to want to set your DISK parameter to it.

export DISK=/dev/mmcblk0
sudo dd if=/dev/zero of=${DISK} bs=1M count=16

sudo sfdisk --in-order --Linux --unit M ${DISK} <<-__EOF__
1,48,0xE,*
,,,-
__EOF__

scy

Opening and closing an SSH tunnel in a shell script the smart way

I recently had the following problem:

• From an unattended shell script (called by Jenkins), run a command-line tool that accesses the MySQL database on another host.
• That tool doesn't know that the database is on another host, plus the MySQL port on that host is firewalled and not accessible from other machines.

We didn't want to open the MySQL port to the network, but it's possible to SSH from the Jenkins machine to the MySQL machine. So, basically you would do something like

ssh -L 3306:localhost:3306 remotehost

samalba

package main

import (
  "fmt"
  "testing"
)

func assertEqual(t *testing.T, a interface{}, b interface{}, message string) {
  if a == b {
    return