Snippets

SVG to PNG

(user)$ rsvg-convert -w 800 input.svg > output.png

Android WiFi “Limited Connection”

(user)$ adb shell
(user)$ settings put global captive_portal_https_url https://httpstat.us/204
(user)$ settings put global captive_portal_http_url http://httpstat.us/204

Extend Library PATH

(user)$ LD_LIBRARY_PATH=$PWD:$LD_LIBRARY_PATH <command ...>

File Encoding

# unzip with specific encoding
(user)$ unzip -O GB18030 <filename> -d <target_dir>

# convert txt encoding
(user)$ iconv -f GB18030 -t UTF-8 < in.txt > out.txt

# urlencode
(user)$ echo "example text" | perl -MURI::Escape -lne 'print uri_escape($_)'

Extract .z01

(user)$ 7z x example.z01

Recursively Change Files and Directories

# change permissin
(user)$ find . -type d -exec chmod 755 {} \;
(user)$ find . -type f -exec chmod 644 {} \;

# rename files (rename.ul)
(user)$ find . -type f -name "foo*" -exec rename foo bar {} \;

# rename files (prename)
(user)$ find . -type f -name "foo*" -exec rename 's/foo/bar' '{}' \;