____  ____________  ____ 
      / / / / / ____/ __ \/ __ \
 __  / / /_/ / __/ / /_/ / / / /
/ /_/ / __  / /___/ _, _/ /_/ / 
\____/_/ /_/_____/_/ |_|\____/  
                                

• awk
• sed
• echo pipe
• tar
  • compress
  • decompress
• color bash
• kill
• device-tree compiler
• samba
• reset USB
  • USB3.0
  • USB2.0
• fio
• usb bandwidth ctrl
• i2c tools
• can util
• k26 suspend
  • waking up IO from UART
  • system suspend
• grep if
• install rpm
• install rpm on ubuntu
• initrd boot run script
• SD flash
  • basic
  • combo to emmc
  • resize disk
• minicom
• PCIE reset
• ffmpeg
  • mp4 to 264
  • resize
• kill
• ethernet
  • ethernet change speed

awk

awk '{print $4}'
awk -F: {'print $2'}
awk -F, {'print $2'}

sed

sed -i 's/MEANR/%s/g' %s

sed 's/MEANR/NWER/g'

echo pipe

find /sys/devices/platform -name "control" | grep 'usb1\|usb2\|usb3\|usb4' | xargs cat

echo on | tee $(find /sys/devices/platform -name "control" | grep 'usb1\|usb2\|usb3\|usb4')

tar

compress

cd <path-to-package-all>
sudo tar -zcvf rootfs.tar.gz .
sudo tar -zcvf <path-you-like>/rootfs.tar.gz .

decompress

sudo tar -zxvf rootfs.tar.gz -C $ROOTPATH

color bash

RED='\033[0;31m'
BLUE='\033[0;34m'
YELLOW='\033[1;33m'
GREEN='\033[0;32m'
NC='\033[0m'
echo -e "I am ${RED}dangerous${NC}."

kill

jobs -l

kill -9 ${PID}

ps -aux | pgrep ${TARGET} | xargs kill -9

device-tree compiler

dtc -O dts -o system.dts system.dtb

dtc -O dtb -o system.dtb system.dts

samba

mount -t cifs -o username=jhh,password=user,vers=1.0 //172.16.92.131/share /mnt/cifs

reset USB

USB3.0

sudo sh -c 'AUTHFILE="/sys/bus/usb/devices/usb2/authorized" ; echo 0 > "$AUTHFILE" ; sleep 1 ; echo 1 > "$AUTHFILE"'

USB2.0

sudo sh -c 'AUTHFILE="/sys/bus/usb/devices/usb1/authorized" ; echo 0 > "$AUTHFILE" ; sleep 1 ; echo 1 > "$AUTHFILE"'

fio

Github repo.

usb bandwidth ctrl

Reference from

echo -1 > /sys/module/usbcore/parameters/autosuspend
echo 0x400 > /sys/module/uvcvideo/parameters/trace
echo 640 > /sys/module/uvcvideo/parameters/quirks

i2c tools

i2cdetect -r -y 0
i2cdump -f -y 0 0x74
i2cset -f -y 0 0x74 0x00 0x0f
i2cdump -f -y 0 0x27

can util

ip link set can0 up type can bitrate 100000
cansend can0 123#0011223344556677
candump can0
ifconfig can0 down

k26 suspend

waking up IO from UART

echo enabled > /sys/devices/platform/amba/ff000000.serial/tty/ttyPS1/power/wakeup
cat /sys/devices/platform/amba/ff000000.serial/tty/ttyPS1/power/wakeup

echo enabled > /sys/devices/platform/amba/ff010000.serial/tty/ttyPS0/power/wakeup
cat /sys/devices/platform/amba/ff010000.serial/tty/ttyPS0/power/wakeup

system suspend

echo mem > /sys/power/state

grep if

cat 1.log | grep -q "string"

if [ "$?" -eq "0" ] ; then
        echo "exist"
else
        echo "not exist"
fi

install rpm

sudo rpm -ivh --froce ./*.rpm

install rpm on ubuntu

sudo alien --to-deb --target=arm64 ./*.rpm 

sudo dpkg -i --force-all ./*.deb

initrd boot run script

cd /etc/init.d
touch innodisk.sh
vi innodisk.sh

#!/bin/bash
case "$1" in
'start')
/home/petalinux/boot.sh 
;;
'stop')
;;
*)
;;
esac
exit

sudo update-rc.d innodisk.sh defaults 99
sudo update-rc.d -f innodisk.sh remove

SD flash

basic

echo -e "d\n\nd\n\nd\n\nn\n\n\n\n+1G\ny\na\nn\n\n\n\n\ny\nw\n" | sudo fdisk /dev/sdx

sudo mkfs.vfat -F 32 -n boot /dev/sd
sudo mkfs.ext4 -L root /dev/sd

combo to emmc

echo -e "d\n\nd\n\nd\n\nn\n\n\n\n+1G\ny\na\nn\n\n\n\n\ny\nw\n" | fdisk /dev/mmcblk0 
sleep 3
mkfs.vfat -F 32 -n boot /dev/mmcblk0p1
mkfs.ext4 -L root /dev/mmcblk0p2
sleep 3
mount /dev/mmcblk0p1 /media/sd-mmcblk0p1
mount /dev/mmcblk0p2 /media/sd-mmcblk0p2
sleep 3
cp /home/petalinux/emmc/* /media/sd-mmcblk0p1/
sleep 3
tar -zxvf rootfs.tar.gz -C /media/sd-mmcblk0p2/
sync

resize disk

cfdisk /dev/mmcblk1
e2fsck -f /dev/mmcblk1p2
resize2fs /dev/mmcblk1p2

minicom

sudo minicom -c on -D /dev/ttyUSB1

PCIE reset

echo 1 > /sys/bus/pci/rescan

ffmpeg

mp4 to 264

ffmpeg -i $INPUTVIDEO -an -vcodec libx264 -crf 23 $OUTPUTVIDEO

resize

ffmpeg -i $INPUTVIDEO -vf scale=${W}:${H} $OUTPUTVIDEO
ffmpeg -i $INPUTVIDEO -vf scale=${W}:-1 $OUTPUTVIDEO

kill

ps aux | pgrep gst | sudo xargs kill -9

ethernet

ethernet change speed

SPEED=${1:-1000}
sudo ethtool -s eth0 autoneg on speed ${SPEED} duplex full
sleep 3
cat /sys/class/net/eth0/speed