Code Snippets

Accessible from anywhere, public (because, why not?), easy to copy/reuse. Perfect.

Rename photos with name followed by original file date/timestamp

exiftool '-filename<file-name-text-goes-here-$CreateDate' -d %Y-%m-%d_%H-%M-%S%%-c.%%le *.jpg

Set photo title and description with exiftool

exiftool -title='Title goes here' -description='Description goes here' .

Kernel customization to enable Elan touchpad on Lenovo Ideapad 330 w/ Ubuntu 18.04:

  #ifdef CONFIG_ACPI static const struct acpi_device_id elan_acpi_id[] = {
{ "ELAN0000", 0 },
{ "ELAN0100", 0 },
{ "ELAN0600", 0 },
{ "ELAN0602", 0 },
{ "ELAN0605", 0 },
{ "ELAN0608", 0 },
{ "ELAN0609", 0 },
{ "ELAN060B", 0 },
{ "ELAN060C", 0 },
{ "ELAN0611", 0 },
{ "ELAN0612", 0 },
{ "ELAN0618", 0 },
{ "ELAN061C", 0 },      <-add this 
{ "ELAN061D", 0 },      <- and this for the lenovo 330 with the core i3
{ "ELAN1000", 0 },
{ } }; MODULE_DEVICE_TABLE(acpi, elan_acpi_id);

Extract Title and Description from json file and write it to jpg file after downloading from Flickr using Flickr Downloadr

for jpg in *.jpg; do exiftool -json=$jpg.json $jpg; done

Rename files in all subdirectories

find . -iname pattern.ext -exec rename 's/oldname/newname/' '{}' \;

If the file name is the same, just use filename instead of ‘pattern.ext’ – if the file names are different, use a pattern like ‘*.md’

Delete line X only if blank in all files in a folder

find ./ -type f -exec sed '1{/^$/d}' {} \;

Delete a line if it matches a pattern in all files in a folder

sudo find ./ -type f -exec sed -i '/pattern-to-match/d' {} \; 

Delete lines *after* a pattern match in all files in a folder

find ./ -type f -exec sed -e '/pattern/{n;N;N;N;N;d}' {} \; 

Add line of text to the beginning of all files in a folder

find ./ -type f -exec sed -i '1s/^/ \n/' {} \; 

Make a folder for each file, then move files to their matching folder If you need to rename the file, add that at the end of the mv command line

dir="/somedir/" for i in "$dir"*;
do if [ -f "$i" ];
then filename="${i%%.*}" if [ ! -d "$filename" ];
then sudo mkdir "$filename" fi sudo mv "$i" "$filename" fi

Match line and do a search/replace for multiple characters on all files

sudo sed -i '/match:/s/to-replace/replace-with/g' * 

Use find and sed to search/replace in all files in all subdirectories

find ./ -type f -exec sed -i -e 's/find-this/replace-with-this/g' {} \;