Unicode normalization

NFD to NFC with convmv

 $ brew install convmv

 # Convert all files in a directory from NFD to NFC:
 $ convmv -f utf-8 -t utf-8 --nfc --notest .

 # Convert all files in a directory from NFC to NFD:
 $ convmv -f utf-8 -t utf-8 --nfd --notest .

NFD to NFC with iconv

 $ iconv -f UTF-8 -t UTF-8-MAC

NFD to NFC with rsync

 $ rsync --iconv=utf-8,utf-8-mac

MP4 to GIF with FFMpeg

 $ ffmpeg -i INPUT.mp4 -f gif OUTPUT.gif

Additional options

 -ss 60.0 : skip 60 seconds
 -t 5 : for 5 seconds
 -r 12 : framerate 12fps
 -y : replace existing file

Example

 $ ffmpeg -i INPUT.mp4 -y -f gif -r 24 -ss 63.0 -t 2.5 OUTPUT.gif

SSH with multiple private keys

Add privat keys

 $ ssh-add ~/.ssh/id_rsa_SERVER

Verify keys

 $ ssh-add -l

Test keys

 $ ssh -v URL_TO_HOST

Connect to server

 $ ssh HOSTNAME_OR_ALIAS

Tensorflow Error : Failed to get convolution algorithm

Tensorflow Error

tensorflow.python.framework.errors_impl.UnknownError: Failed to get convolution algorithm. This is probably because cuDNN failed to initialize, so try looking to see if a warning log message was printed above.

Solution

• shell

  export CUDA_VISIBLE_DEVICES=0

• for tf 2

  import os
  
  os.environ['TF_FORCE_GPU_ALLOW_GROWTH'] = 'true'

• for tensorflow-gpu v1.8

  from tensorflow.compat.v1 import ConfigProto
  from tensorflow.compat.v1 import InteractiveSession
  
  config = ConfigProto()
  config.gpu_options.allow_growth = True
  session = InteractiveSession(config=config)

ISO to USB on Mac Mojave

1. List devices

   $ diskutil list
   /dev/disk0 (internal, physical):
      #:                       TYPE NAME                    SIZE       IDENTIFIER
      0:      GUID_partition_scheme                        *251.0 GB   disk0
      1:                        EFI EFI                     314.6 MB   disk0s1
      2:                 Apple_APFS Container disk1         250.7 GB   disk0s2
   
   /dev/disk1 (synthesized):
      #:                       TYPE NAME                    SIZE       IDENTIFIER
      0:      APFS Container Scheme -                      +250.7 GB   disk1
                                    Physical Store disk0s2
      1:                APFS Volume Macintosh HD - Data     77.5 GB    disk1s1
      2:                APFS Volume Preboot                 82.0 MB    disk1s2
      3:                APFS Volume Recovery                528.1 MB   disk1s3
      4:                APFS Volume VM                      1.1 GB     disk1s4
      5:                APFS Volume Macintosh HD            11.1 GB    disk1s5
   
   /dev/disk2 (external, physical):
      #:                       TYPE NAME                    SIZE       IDENTIFIER
      0:     FDisk_partition_scheme                        *124.2 GB   disk2
      1:             Windows_FAT_32 CCCOMA_X64F             124.2 GB   disk2s1
   

2. Unmount USB stick

   $ diskutil unmountDisk /dev/disk2
   Unmount of all volumes on disk2 was successful
   

3. $ sudo dd if=kali-linux-2020.1b-installer-amd64.iso of=/dev/disk2 bs=1m
   Password:
   2075+1 records in
   2075+1 records out
   2176778240 bytes transferred in 656.146374 secs (3317519 bytes/sec)
   

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