start pynq use nfs, system start ok,but i can’t run my application useing the jupyter notebook,include demo in base/board_btns_leds.
my step:
uboot bootargs setenv bootargs root=/dev/nfs rw nfsroot=192.168.1.175:/home/xilinx/pynq_nfs_root,nolock,nfsvers=3 ip=192.168.1.62:192.168.1.175:192.168.1.175:255.255.255.0::eth0:off rootwait
open jupyter_notebook using ip:9090
open notebook base/board_btns_leds.
5 run
notebook ERROR
ValueError Traceback (most recent call last)
<ipython-input-1-50977567be3f> in <module>()
2 from pynq.overlays.base import BaseOverlay
3
----> 4 base = BaseOverlay("base.bit")
5
6 Delay1 = 0.3
/usr/local/lib/python3.6/dist-packages/pynq/overlays/base/base.py in __init__(self, bitfile, **kwargs)
98 self.pin_select = GPIO(GPIO.get_gpio_pin(
99 self.gpio_dict['pmoda_rp_pin_sel']['index']), "out")
--> 100 self.audio = self.audio_codec_ctrl_0
101
102 self.leds = self.leds_gpio.channel1
/usr/local/lib/python3.6/dist-packages/pynq/overlay.py in __getattr__(self, key)
335 """
336 if self.is_loaded():
--> 337 return getattr(self._ip_map, key)
338 else:
339 raise RuntimeError("Overlay not currently loaded")
/usr/local/lib/python3.6/dist-packages/pynq/overlay.py in __getattr__(self, key)
735 elif key in self._description['ip']:
736 ipdescription = self._description['ip'][key]
--> 737 driver = ipdescription['driver'](ipdescription)
738 setattr(self, key, driver)
739 return driver
/usr/local/lib/python3.6/dist-packages/pynq/lib/audio.py in __init__(self, description)
357 self.iic_index = None
358 self.uio_index = None
--> 359 self.configure()
360
361 bindto = ['xilinx.com:user:audio_codec_ctrl:1.0']
/usr/local/lib/python3.6/dist-packages/pynq/lib/audio.py in configure(self, sample_rate, iic_index, uio_name)
387 self.uio_index = get_uio_index(uio_name)
388 if self.uio_index is None:
--> 389 raise ValueError("Cannot find UIO device {}".format(uio_name))
390
391 self._libaudio.config_audio_pll(self.iic_index)
ValueError: Cannot find UIO device audio-codec-ctrl
STARTUP
Zynq> boot
163 bytes read in 6 ms (26.4 KiB/s)
Loaded environment from uEnv.txt
Importing environment from SD ...
Device: mmc@e0100000
Manufacturer ID: 3
OEM: 5344
Name: SC16G
Bus Speed: 50000000
Mode : SD High Speed (50MHz)
Rd Block Len: 512
SD version 3.0
High Capacity: Yes
Capacity: 14.8 GiB
Bus Width: 4-bit
Erase Group Size: 512 Bytes
4771268 bytes read in 276 ms (16.5 MiB/s)
## Loading kernel from FIT Image at 10000000 ...
Using 'conf@1' configuration
Verifying Hash Integrity ... OK
Trying 'kernel@0' kernel subimage
Description: Linux Kernel
Type: Kernel Image
Compression: uncompressed
Data Start: 0x100000d4
Data Size: 4752880 Bytes = 4.5 MiB
Architecture: ARM
OS: Linux
Load Address: 0x00080000
Entry Point: 0x00080000
Hash algo: sha1
Hash value: f0d022f59e1266bfc5bb33d36a03c8f9d3210c1f
Verifying Hash Integrity ... sha1+ OK
## Loading fdt from FIT Image at 10000000 ...
Using 'conf@1' configuration
Verifying Hash Integrity ... OK
Trying 'fdt@0' fdt subimage
Description: Flattened Device Tree blob
Type: Flat Device Tree
Compression: uncompressed
Data Start: 0x104887b8
Data Size: 17093 Bytes = 16.7 KiB
Architecture: ARM
Hash algo: sha1
Hash value: 8899d6d25301f1e831133eac3ff0fc67091de697
Verifying Hash Integrity ... sha1+ OK
Booting using the fdt blob at 0x104887b8
Loading Kernel Image ... OK
Loading Device Tree to 07ff8000, end 07fff2c4 ... OK
Starting kernel ...
Booting Linux on physical CPU 0x0
Linux version 4.19.0-xilinx-v2019.1 (oe-user@oe-host) (gcc version 8.2.0 (GCC)) #1 SMP PREEMPT Thu Oct 3 17:13:49 UTC 2019
CPU: ARMv7 Processor [413fc090] revision 0 (ARMv7), cr=18c5387d
CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
OF: fdt: Machine model: xlnx,zynq-7000
Memory policy: Data cache writealloc
cma: Reserved 128 MiB at 0x18000000
random: get_random_bytes called from start_kernel+0x80/0x3e4 with crng_init=0
percpu: Embedded 16 pages/cpu @(ptrval) s35980 r8192 d21364 u65536
Built 1 zonelists, mobility grouping on. Total pages: 129920
Kernel command line: root=/dev/nfs rw nfsroot=192.168.1.175:/home/xilinx/pynq_nfs_root,nolock,nfsvers=3 ip=192.168.1.62:192.168.1.175:192.168.1.175:255.255.255.0::eth0:off rootwait
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Memory: 376512K/524288K available (7168K kernel code, 230K rwdata, 1800K rodata, 1024K init, 258K bss, 16704K reserved, 131072K cma-reserved, 0K highmem)
Virtual kernel memory layout:
vector : 0xffff0000 - 0xffff1000 ( 4 kB)
fixmap : 0xffc00000 - 0xfff00000 (3072 kB)
vmalloc : 0xe0800000 - 0xff800000 ( 496 MB)
lowmem : 0xc0000000 - 0xe0000000 ( 512 MB)
pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB)
modules : 0xbf000000 - 0xbfe00000 ( 14 MB)
.text : 0x(ptrval) - 0x(ptrval) (8160 kB)
.init : 0x(ptrval) - 0x(ptrval) (1024 kB)
.data : 0x(ptrval) - 0x(ptrval) ( 230 kB)
.bss : 0x(ptrval) - 0x(ptrval) ( 259 kB)
rcu: Preemptible hierarchical RCU implementation.
rcu: RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=2.
Tasks RCU enabled.
rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
efuse mapped to (ptrval)
slcr mapped to (ptrval)
L2C: platform modifies aux control register: 0x72360000 -> 0x72760000
L2C: DT/platform modifies aux control register: 0x72360000 -> 0x72760000
L2C-310 erratum 769419 enabled
L2C-310 enabling early BRESP for Cortex-A9
L2C-310 full line of zeros enabled for Cortex-A9
L2C-310 ID prefetch enabled, offset 1 lines
L2C-310 dynamic clock gating enabled, standby mode enabled
L2C-310 cache controller enabled, 8 ways, 512 kB
L2C-310: CACHE_ID 0x410000c8, AUX_CTRL 0x76760001
zynq_clock_init: clkc starts at (ptrval)
Zynq clock init
sched_clock: 64 bits at 325MHz, resolution 3ns, wraps every 4398046511103ns
clocksource: arm_global_timer: mask: 0xffffffffffffffff max_cycles: 0x4af477f6aa, max_idle_ns: 440795207830 ns
Switching to timer-based delay loop, resolution 3ns
clocksource: ttc_clocksource: mask: 0xffff max_cycles: 0xffff, max_idle_ns: 551318127 ns
timer #0 at (ptrval), irq=17
Console: colour dummy device 80x30
console [tty0] enabled
Calibrating delay loop (skipped), value calculated using timer frequency.. 650.00 BogoMIPS (lpj=3250000)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
CPU: Testing write buffer coherency: ok
CPU0: Spectre v2: using BPIALL workaround
CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
Setting up static identity map for 0x100000 - 0x100060
rcu: Hierarchical SRCU implementation.
smp: Bringing up secondary CPUs ...
CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
CPU1: Spectre v2: using BPIALL workaround
smp: Brought up 1 node, 2 CPUs
SMP: Total of 2 processors activated (1300.00 BogoMIPS).
CPU: All CPU(s) started in SVC mode.
devtmpfs: initialized
VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4
clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
futex hash table entries: 512 (order: 3, 32768 bytes)
pinctrl core: initialized pinctrl subsystem
NET: Registered protocol family 16
DMA: preallocated 256 KiB pool for atomic coherent allocations
cpuidle: using governor menu
hw-breakpoint: found 5 (+1 reserved) breakpoint and 1 watchpoint registers.
hw-breakpoint: maximum watchpoint size is 4 bytes.
zynq-ocm f800c000.ocmc: ZYNQ OCM pool: 256 KiB @ 0x(ptrval)
zynq-pinctrl 700.pinctrl: zynq pinctrl initialized
e0000000.serial: ttyPS0 at MMIO 0xe0000000 (irq = 27, base_baud = 6250000) is a xuartps
console [ttyPS0] enabled
vgaarb: loaded
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
media: Linux media interface: v0.10
videodev: Linux video capture interface: v2.00
pps_core: LinuxPPS API ver. 1 registered
pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
PTP clock support registered
EDAC MC: Ver: 3.0.0
FPGA manager framework
Advanced Linux Sound Architecture Driver Initialized.
clocksource: Switched to clocksource arm_global_timer
NET: Registered protocol family 2
tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 6144 bytes)
TCP established hash table entries: 4096 (order: 2, 16384 bytes)
TCP bind hash table entries: 4096 (order: 3, 32768 bytes)
TCP: Hash tables configured (established 4096 bind 4096)
UDP hash table entries: 256 (order: 1, 8192 bytes)
UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
NET: Registered protocol family 1
RPC: Registered named UNIX socket transport module.
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
hw perfevents: no interrupt-affinity property for /pmu@f8891000, guessing.
hw perfevents: enabled with armv7_cortex_a9 PMU driver, 7 counters available
Initialise system trusted keyrings
workingset: timestamp_bits=14 max_order=17 bucket_order=3
jffs2: version 2.2. (NAND) (SUMMARY) © 2001-2006 Red Hat, Inc.
Key type asymmetric registered
Asymmetric key parser 'x509' registered
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
io scheduler mq-deadline registered
io scheduler kyber registered
dma-pl330 f8003000.dmac: Loaded driver for PL330 DMAC-241330
dma-pl330 f8003000.dmac: DBUFF-128x8bytes Num_Chans-8 Num_Peri-4 Num_Events-16
brd: module loaded
loop: module loaded
m25p80 spi0.0: found s25fl128s, expected n25q512a
m25p80 spi0.0: s25fl128s (16384 Kbytes)
4 fixed-partitions partitions found on MTD device spi0.0
Creating 4 MTD partitions on "spi0.0":
0x000000000000-0x000000500000 : "boot"
0x000000500000-0x000000520000 : "bootenv"
0x000000520000-0x000000fa0000 : "kernel"
0x000000fa0000-0x000001000000 : "spare"
libphy: Fixed MDIO Bus: probed
tun: Universal TUN/TAP device driver, 1.6
CAN device driver interface
libphy: MACB_mii_bus: probed
RTL8211E Gigabit Ethernet e000b000.ethernet-ffffffff:01: attached PHY driver [RTL8211E Gigabit Ethernet] (mii_bus:phy_addr=e000b000.ethernet-ffffffff:01, irq=POLL)
macb e000b000.ethernet eth0: Cadence GEM rev 0x00020118 at 0xe000b000 irq 29 (00:05:6b:00:b9:9a)
e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k
e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
ehci-pci: EHCI PCI platform driver
usbcore: registered new interface driver cdc_acm
cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
usbcore: registered new interface driver cdc_wdm
usbcore: registered new interface driver usb-storage
usbcore: registered new interface driver usbserial_generic
usbserial: USB Serial support registered for generic
usbcore: registered new interface driver usb_serial_simple
usbserial: USB Serial support registered for carelink
usbserial: USB Serial support registered for zio
usbserial: USB Serial support registered for funsoft
usbserial: USB Serial support registered for flashloader
usbserial: USB Serial support registered for google
usbserial: USB Serial support registered for libtransistor
usbserial: USB Serial support registered for vivopay
usbserial: USB Serial support registered for moto_modem
usbserial: USB Serial support registered for motorola_tetra
usbserial: USB Serial support registered for novatel_gps
usbserial: USB Serial support registered for hp4x
usbserial: USB Serial support registered for suunto
usbserial: USB Serial support registered for siemens_mpi
chipidea-usb2 e0002000.usb: e0002000.usb supply vbus not found, using dummy regulator
chipidea-usb2 e0002000.usb: Linked as a consumer to regulator.0
ULPI transceiver vendor/product ID 0x0451/0x1507
Found TI TUSB1210 ULPI transceiver.
ULPI integrity check: passed.
ci_hdrc ci_hdrc.0: EHCI Host Controller
ci_hdrc ci_hdrc.0: new USB bus registered, assigned bus number 1
ci_hdrc ci_hdrc.0: USB 2.0 started, EHCI 1.00
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
i2c /dev entries driver
cdns-i2c e0004000.i2c: 100 kHz mmio e0004000 irq 23
cdns-i2c e0005000.i2c: 100 kHz mmio e0005000 irq 24
cdns-wdt f8005000.watchdog: Xilinx Watchdog Timer at (ptrval) with timeout 10s
EDAC MC: ECC not enabled
Xilinx Zynq CpuIdle Driver started
sdhci: Secure Digital Host Controller Interface driver
sdhci: Copyright(c) Pierre Ossman
sdhci-pltfm: SDHCI platform and OF driver helper
mmc0: SDHCI controller on e0100000.mmc [e0100000.mmc] using ADMA
ledtrig-cpu: registered to indicate activity on CPUs
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
xlnk xlnk: Major 244
xlnk xlnk: xlnk driver loaded
xlnk xlnk: xlnk_pdev is not null
fpga_manager fpga0: Xilinx Zynq FPGA Manager registered
NET: Registered protocol family 10
Segment Routing with IPv6
sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
NET: Registered protocol family 17
can: controller area network core (rev 20170425 abi 9)
NET: Registered protocol family 29
can: raw protocol (rev 20170425)
can: broadcast manager protocol (rev 20170425 t)
can: netlink gateway (rev 20170425) max_hops=1
Registering SWP/SWPB emulation handler
Loading compiled-in X.509 certificates
mmc0: new high speed SDHC card at address aaaa
of-fpga-region fpga-full: FPGA Region probed
mmcblk0: mmc0:aaaa SC16G 14.8 GiB
hctosys: unable to open rtc device (rtc0)
of_cfs_init
of_cfs_init: OK
IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
mmcblk0: p1 p2
macb e000b000.ethernet eth0: link up (1000/Full)
IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
IP-Config: Complete:
device=eth0, hwaddr=00:05:6b:00:b9:9a, ipaddr=192.168.1.62, mask=255.255.255.0, gw=192.168.1.175
host=192.168.1.62, domain=, nis-domain=(none)
bootserver=192.168.1.175, rootserver=192.168.1.175, rootpath=
cfg80211: Loading compiled-in X.509 certificates for regulatory database
cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
cfg80211: failed to load regulatory.db
ALSA device list:
No soundcards found.
VFS: Mounted root (nfs filesystem) on device 0:14.
devtmpfs: mounted
Freeing unused kernel memory: 1024K
Run /sbin/init as init process
random: fast init done
systemd[1]: System time before build time, advancing clock.
systemd[1]: Failed to insert module 'autofs4': No such file or directory
systemd[1]: systemd 237 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN2 +IDN -PCRE2 default-hierarchy=hybrid)
systemd[1]: Detected architecture arm.
Welcome to PynqLinux, based on Ubuntu 18.04!
systemd[1]: Set hostname to <pynq>.
random: systemd: uninitialized urandom read (16 bytes read)
systemd[1]: Reached target Remote File Systems.
[ OK ] Reached target Remote File Systems.
random: systemd: uninitialized urandom read (16 bytes read)
systemd[1]: Started Forward Password Requests to Wall Directory Watch.
[ OK ] Started Forward Password Requests to Wall Directory Watch.
random: systemd: uninitialized urandom read (16 bytes read)
systemd[1]: Created slice User and Session Slice.
[ OK ] Created slice User and Session Slice.
systemd[1]: Created slice System Slice.
[ OK ] Created slice System Slice.
systemd[1]: Listening on Journal Socket.
[ OK ] Listening on Journal Socket.
systemd[1]: Mounting Kernel Debug File System...
Mounting Kernel Debug File System...
systemd[1]: Starting Nameserver information manager...
Starting Nameserver information manager...
[ OK ] Reached target Slices.
[ OK ] Listening on /dev/initctl Compatibility Named Pipe.
Starting Load Kernel Modules...
[ OK ] Started Dispatch Password Requests to Console Directory Watch.
[ OK ] Reached target Swap.
[ OK ] Reached target System Time Synchronized.
[ OK ] Reached target Local Encrypted Volumes.
Mounting POSIX Message Queue File System...
[ OK ] Started ntp-systemd-netif.path.
[ OK ] Created slice system-getty.slice.
[ OK ] Listening on udev Control Socket.
Starting Load/Save Random Seed...
[ OK ] Listening on Syslog Socket.
[ OK ] Listening on udev Kernel Socket.
Starting udev Coldplug all Devices...
Starting Restore / save the current clock...
[ OK ] Listening on Journal Socket (/dev/log).
Starting Journal Service...
Starting Create Static Device Nodes in /dev...
[ OK ] Created slice system-serial\x2dgetty.slice.
[ OK ] Mounted Kernel Debug File System.
[ OK ] Started Load Kernel Modules.
[ OK ] Started Journal Service.
[ OK ] Mounted POSIX Message Queue File System.
[ OK ] Started Load/Save Random Seed.
[ OK ] Started Restore / save the current clock.
[ OK ] Started Create Static Device Nodes in /dev.
[ OK ] Started Nameserver information manager.
[ OK ] Reached target Network (Pre).
Starting udev Kernel Device Manager...
[ OK ] Reached target Local File Systems (Pre).
[ OK ] Reached target Local File Systems.
Starting Enable support for additional executable binary formats...
Starting Flush Journal to Persistent Storage...
Mounting Kernel Configuration File System...
Starting Apply Kernel Variables...
[ OK ] Started Enable support for additional executable binary formats.
[ OK ] Mounted Kernel Configuration File System.
systemd-journald[826]: Received request to flush runtime journal from PID 1
[ OK ] Started udev Kernel Device Manager.
[ OK ] Started Apply Kernel Variables.
[ OK ] Started udev Coldplug all Devices.
Starting Raise network interfaces...
[ OK ] Started Flush Journal to Persistent Storage.
Starting Create Volatile Files and Directories...
[ OK ] Found device /dev/ttyPS0.
[ OK ] Started Create Volatile Files and Directories.
[ OK ] Started ifup for eth0.
[ OK ] Started Entropy daemon using the HAVEGE algorithm.
Starting Network Name Resolution...
Starting Network Time Synchronization...
Starting Update UTMP about System Boot/Shutdown...
[ OK ] Started Update UTMP about System Boot/Shutdown.
[ OK ] Started Network Name Resolution.
[ OK ] Started Network Time Synchronization.
[ OK ] Reached target System Initialization.
[ OK ] Started Discard unused blocks once a week.
[ OK ] Started Message of the Day.
[ OK ] Started Daily apt download activities.
[ OK ] Listening on D-Bus System Message Bus Socket.
[ OK ] Started Daily apt upgrade and clean activities.
[ OK ] Started resolvconf-pull-resolved.path.
[ OK ] Reached target Paths.
[ OK ] Started Daily Cleanup of Temporary Directories.
[ OK ] Reached target Timers.
[ OK ] Listening on UUID daemon activation socket.
[ OK ] Reached target Sockets.
[ OK ] Reached target Basic System.
[ OK ] Started Set the CPU Frequency Scaling governor.
Starting Dispatcher daemon for systemd-networkd...
[ OK ] Started Regular background program processing daemon.
Starting resolvconf-pull-resolved.service...
Starting Login Service...
[ OK ] Started D-Bus System Message Bus.
[ OK ] Started Login Service.
Starting WPA supplicant...
Starting Resize Filesystem on SD card...
Starting LSB: Load kernel modules needed to enable cpufreq scaling...
Starting Jupyter Notebook Server...
Starting LSB: automatic crash report generation...
Starting PYNQ PL Server...
Starting System Logging Service...
[ OK ] Started ntp-systemd-netif.service.
[ OK ] Reached target Host and Network Name Lookups.
[ OK ] Started WPA supplicant.
[ OK ] Started PYNQ PL Server.
[ OK ] Started resolvconf-pull-resolved.service.
[ OK ] Started System Logging Service.
[ OK ] Started Resize Filesystem on SD card.
[ OK ] Started LSB: automatic crash report generation.
[ OK ] Started LSB: Load kernel modules needed to enable cpufreq scaling.
Starting LSB: set CPUFreq kernel parameters...
[ OK ] Started LSB: set CPUFreq kernel parameters.
Stopping Network Name Resolution...
[ OK ] Stopped Network Name Resolution.
Starting Network Name Resolution...
[ OK ] Started Dispatcher daemon for systemd-networkd.
Starting resolvconf-pull-resolved.service...
[ OK ] Started Network Name Resolution.
[ OK ] Started resolvconf-pull-resolved.service.
[ OK ] Started Raise network interfaces.
[ OK ] Reached target Network.
[ OK ] Started Unattended Upgrades Shutdown.
Starting OpenBSD Secure Shell server...
Starting Permit User Sessions...
[ OK ] Reached target Network is Online.
[ OK ] Started ISC DHCP IPv4 server.
Starting Samba NMB Daemon...
[ OK ] Started ISC DHCP IPv6 server.
[ OK ] Started Permit User Sessions.
[ OK ] Started Getty on tty1.
[ OK ] Started Serial Getty on ttyPS0.
[ OK ] Reached target Login Prompts.
PYNQ Linux, based on Ubuntu 18.04 pynq ttyPS0
pynq login: xilinx (automatic login)
Welcome to PYNQ Linux, based on Ubuntu 18.04 (GNU/Linux 4.19.0-xilinx-v2019.1 armv7l)
The programs included with the PYNQ Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
PYNQ Linux comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.
To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.