Thanks to the recent v4.4.1 BuddyBoard firmware the http file api works as desired: you can easily upload files to a usb stick attached to the printer. To perform bulk updates of your printer farm it’s much easier to write a simple bash script which deploys the print jobs:
Uploading multiple files and checksums via http can be achieved with cURL and a few lines bash scripting. This might replace scp in most cases.
# array of files (and checksums) provided as cURL options
UPLOAD_FILES=()
# get all files within myUploadDir dir and calculate checksums
while read -r FILE
do
# get sha256 checksum
CHECKSUM=$(sha256sum ${FILE} | awk '{print $1}' )
echo $FILE
echo $CHECKSUM
# extract filename
FILENAME=$(basename ${FILE})
# append file and checksum to curl upload args
UPLOAD_FILES+=("-F" "file=@${FILE}")
UPLOAD_FILES+=("-F" "${FILENAME}=${CHECKSUM}")
# get all files within myUploadDir
done <<<$(find myUploadDir/* -type f | sort)
# upload
curl \
-X PUT -H "Content-Type: multipart/form-data" \
"${UPLOAD_FILES[@]}" \
https://httpbin.org/put
The EdgeRouter X-SFP is a quite powerful dualcore (880Mhz, 256MB RAM, 256MB flash) device powered by a MediaTek MT7621AT SoC. OpenWrt 21 (snapshot) comes with support for the SFP slot (attached to the switch port eth5 via RGMII). Note: it won’t work with OpenWrt 19! Custom build# As of April 2021 it requires a custom […]
The MikroTik CRS switches are absolutely awesome! You get a full featured, managed, wire speed switch combined with a SoC running RouterOS.But on the “downside” the configuration can be very complex and requires some deeper knowledge about switching and linux networking in general – as a linux user you will love it ;) Step 1 […]
With the release of the new AMD EPYC based cloud servers (CPX), Hetzner has applied some changes to their virtualization platform (QEMU). The network interface names have changed due to the modern virtio_net network adapter 0x1041 including different pcie bus addresses. All Hetzner standard images are now using the net.ifnames=0 setting to enforce the kernel […]
gnugp is very useful to encrypt files using a public key – this allows you to create backups without sharing a keyfile. But it’s a bit tricky to explicitly use a public-keyfile instead of the global keyring via fingerprint. Directory Structure# This script creates a custom .gnupg directory (gpg home) in the current working directory […]
In case you’re using self-signed x509 certificates you may see this error message within the traefik logs – the solution is quite easy: the first certificate of your combined pem file (ca+intermediate+server) has to be the server certificate!
These days, some cloud hosting environments still didn’t offer dhcp6 services (for example Hetzner Cloud) – therefore it’s impossible to use an automated ipv6 configuration with iPXE. But a static configuration can still be used: File: config.ipxe#
PS1 magic# The default prompt of BusyBox ash shell looks a bit old fashioned . But thanks to nearly full support of the PS1 environment variable you can customize the prompt to match your needs. Customizing the PS1 variable is quite simple: just add /etc/profile which is read automatically by ash when it’s used as […]
The HPE Microserver GEN10 is an impressive piece of rock-solid hardware. Of course… ILO is missing compared to GEN8 but for most use-cases thats not a real issue.
Debian buster runs nearly out-of-the-box using the netinstall image via USB Stick or network boot. The following tweaks are required to run it flawlessly:
The firmware package firmware-linux-nonfree is required for the AMD APU. Adding “nomodeset” to kernel command line may also work as mentioned on debian.org
You may notice a iommu error on boot: the iommu is disabled by default – to enable it add the following parameters to your grub config:
File: /etc/default/grub
GRUB_CMDLINE_LINUX="amd_iommo=on iommu=pt"
Run update-grub2 to apply the changes and reboot the system – press F2 within the boot menu and to open the BIOS/UEFI menu. The iommu has to be enabled in Chipset -> GFX Configuration -> IOMMU.
In case you didn’t run any VMs on the maschine consider to keep iommu disabled – otherwise the SATA ports (Marvell 88SE9230) on the front become unusable!
Just FYI
# cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 21 model : 96 model name : AMD Opteron(tm) X3418 APU stepping : 1 microcode : 0x600611a cpu MHz : 1300.000 cache size : 1024 KB physical id : 0 siblings : 4 core id : 0 cpu cores : 2 apicid : 16 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good acc_power nopl nonstop_tsc extd_apicid aperfmperf pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs xop skinit wdt lwp fma4 tce nodeid_msr tbm topoext perfctr_core perfctr_nb bpext ptsc mwaitx cpb hw_pstate ssbd ibpb vmmcall fsgsbase bmi1 avx2 smep bmi2 xsaveopt amd_ibpb arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic overflow_recov bugs : fxsave_leak sysret_ss_attrs null_seg spectre_v1 spectre_v2 spec_store_bypass bogomips : 3593.06 TLB size : 1536 4K pages clflush size : 64 cache_alignment : 64 address sizes : 48 bits physical, 48 bits virtual power management: ts ttp tm 100mhzsteps hwpstate cpb eff_freq_ro acc_power [13]
# Tests are approximate using memory only (no storage IO).
PBKDF2-sha1 798003 iterations per second for 256-bit key
PBKDF2-sha256 1126290 iterations per second for 256-bit key
PBKDF2-sha512 1038194 iterations per second for 256-bit key
PBKDF2-ripemd160 529049 iterations per second for 256-bit key
PBKDF2-whirlpool 373424 iterations per second for 256-bit key
argon2i 4 iterations, 638239 memory, 4 parallel threads (CPUs) for 256-bit key (requested 2000 ms time)
argon2id 4 iterations, 639177 memory, 4 parallel threads (CPUs) for 256-bit key (requested 2000 ms time)
# Algorithm | Key | Encryption | Decryption
aes-cbc 128b 532.4 MiB/s 1417.2 MiB/s
serpent-cbc 128b 68.2 MiB/s 231.7 MiB/s
twofish-cbc 128b 128.6 MiB/s 203.6 MiB/s
aes-cbc 256b 429.0 MiB/s 1177.7 MiB/s
serpent-cbc 256b 78.3 MiB/s 234.3 MiB/s
twofish-cbc 256b 138.3 MiB/s 204.9 MiB/s
aes-xts 256b 848.9 MiB/s 853.7 MiB/s
serpent-xts 256b 246.4 MiB/s 227.9 MiB/s
twofish-xts 256b 195.3 MiB/s 202.2 MiB/s
aes-xts 512b 760.8 MiB/s 769.9 MiB/s
serpent-xts 512b 247.6 MiB/s 227.3 MiB/s
twofish-xts 512b 193.9 MiB/s 201.1 MiB/s