Generate cryptographically secure random data using openssl rand.
# 32 random bytes as base64 (43 chars, URL-safe with tr)
openssl rand -base64 32 | tr '+/' '-_' | tr -d '='
# 24 random bytes as hex (48 chars)
openssl rand -hex 24
# alphanumeric password (32 chars)
openssl rand -base64 48 | tr -dc 'a-zA-Z0-9' | head -c 32
| Use Case | Command | ||||
|---|---|---|---|---|---|
| ---------- | --------- | ||||
| Password (strong) | openssl rand -base64 24 | ||||
| API key | openssl rand -hex 32 | ||||
| Session token | openssl rand -base64 48 | ||||
| Short PIN (8 digits) | `openssl rand -hex 4 | xxd -r -p | od -An -tu4 | tr -d ' ' | head -c 8` |
-base64 outputs ~1.33x the byte count in characters-hex outputs 2x the byte count in characterstr -dc to filter character sets共 1 个版本