Shell Write File

ruby -e 'f=File.new("test.txt", "w") ;f.write("test") '

python -c "f=open('test.txt','a');f.write('line.')"

python -c "with open('test.txt', 'a') as the_file:the_file.write('test')"

perl -e "open(F,'>test.txt');print F 'test';"

php -r '$f=fopen("test.txt", "w");fwrite($f, "test");'

sed -i 's/test/TEST/' test.txt

export a="abc" && `$a`

ls | tee test.txt