t2psyto

# encode from binary file to base64txt
powershell -C "& {$outpath = (Join-Path (pwd) 'out_base64.txt'); $inpath = (Join-Path (pwd) 'data.jpg'); [IO.File]::WriteAllText($outpath, ([convert]::ToBase64String(([IO.File]::ReadAllBytes($inpath)))))}"

# decode from base64txt to binary file
powershell -C "& {$outpath = (Join-Path (pwd) 'outdata2.jpg'); $inpath = (Join-Path (pwd) 'out_base64.txt'); [IO.File]::WriteAllBytes($outpath, ([convert]::FromBase64String(([IO.File]::ReadAllText($inpath)))))}"

grepory

I'll be omitting syscalls with ellipsis.

The first thing that happens after you press enter is that bash resolves 
curl to /usr/bin/curl and then forks(). The strace output is from the 
forked process.

Fist execve() the /usr/bin/curl binary and pass an array of arguments to it.
execve("/usr/bin/curl", ["curl", "http://github.com"], [/* 8 vars */]) = 0
...