Linux - base64 encode

echo -n 'admin' | base64

This should yield:
YWRtaW4=

 

zzh@ZZHPC:~$ echo -n 'admin'
adminzzh@ZZHPC:~$ echo -n 'admin' | base64
YWRtaW4=

 

For base64 decode, see https://www.cnblogs.com/zhangzhihui/p/14343815.html .