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# https://askubuntu.com/a/1000020/657385
ffmpeg -i file_orig.mp3 -acodec copy file_fixed.mp3

# https://www.xmodulo.com/convert-mp3-id3-tag-encodings-linux.html
mid3iconv -e gbk/big5 -d input.mp3

binshengliu

# https://unix.stackexchange.com/a/501546/215915
env LC_ALL=zh_CN.GB2312 7z x file.zip
convmv -f zh_CN.GB2312 -t UTF8 -r .

binshengliu

convert passport.jpg -background transparent -fill black -size 1024x256 -pointsize 24 -gravity center -annotate +0+205 'For ... Purpose' passport-water.jpg

binshengliu

# https://wiki.archlinux.org/title/Rsync#Full_system_backup
rsync -aAXHv --exclude={"/dev/*","/proc/*","/sys/*","/tmp/*","/run/*","/mnt/*","/media/*","/lost+found"} / /path/to/backup

# More human readable
rsync -aAXHh --info=progress2 --exclude={"/dev/*","/proc/*","/sys/*","/tmp/*","/run/*","/mnt/*","/media/*","/lost+found"} / /path/to/backup

binshengliu

% https://tex.stackexchange.com/a/84763/124998
\usepackage{pgfpages}
\setbeameroption{show notes}
\setbeameroption{show notes on second screen=right}

% Command line:
% pdfpc --notes=right presentation.pdf

binshengliu

# https://askubuntu.com/a/50180
pdftoppm -png -r 300 input.pdf png/out

binshengliu

# Copied from https://stackoverflow.com/a/56175538/955952

def indep_roll(arr, shifts, axis=1):
    """Apply an independent roll for each dimensions of a single axis.

    Parameters
    ----------
    arr : np.ndarray
        Array of any shape.

binshengliu

# lens = [3, 5, 4]
# What we want:
# mask = [[1, 1, 1, 0, 0],
#         [1, 1, 1, 1, 1],
#         [1, 1, 1, 1, 0]]

# https://stackoverflow.com/questions/53403306/how-to-batch-convert-sentence-lengths-to-masks-in-pytorch
def len_to_mask(lens: np.ndarray, seq_len: Optional[int] = None) -> np.ndarray:
    if seq_len is None:
        seq_len = max(lens)

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logging.basicConfig(
    level=logging.INFO,
    stream=sys.stderr,
    format="[%(asctime)s][%(levelname)s] - %(message)s",
)
log = logging.getLogger(__name__)

binshengliu

# Number each line
cat FILE | sed -r 's/^[[:space:]]*//' | awk '{print NR, "\t", $0}'

# Remove empty lines and number
cat FILE | sed -r 's/^[[:space:]]*//' | grep -v '^$' | awk '{print NR, "\t", $0}'