RandomData

Hat tip to Stack Overflow:

To generate random data, you can use /dev/urandom via dd and base64 encode.

Here, we create 1024 bytes of random data:

$ dd if=/dev/urandom bs=1024 count=1 | base64 2> /dev/null
1+0 records in
1+0 records out
1024 bytes transferred in 0.000165 secs (6206600 bytes/sec)
jO9seykpzvrPTYY4+k6n1nvnduI0uBJJ8Yt7RLPf8X+HVv3+25IRVPrSQNJTc30ClPA9TsWRM8/xVXQuL34+yWk+Usdhh044Yi5KGoUItjmPW85D3Vqydx37CPuqnVU4w2H6iAcIbPB43vsY8bWGfEaqOuHYNrkPm8FPBAbk4la4aSz3R9LHLgIj73DXx424ljdqbB2HgAtNAsqo9kMILnNsTZSmT6IvRzUFCoeinnOmrVL1tmJBx6MAi+QDyMAKqIgeeVDgehFaspnGU3JOm+R8GA2flRWjTuVPDjKCj2o3aQ76HIiQ5Rq4PD9I3suYWjS7O1MY9WAHy/4SfJO3bbaRbpk1pxKxVJRyicO4GG2Q43fiZJFrojaJtJpPFwxUhsIRlbBKgxdxwjUG9cQ9W2lBa2xeSWT9hmubMhO8o9VXY4ZZ6rWvDYjBaIyXzkA8/MoGi33nGaZPNCEUQ29cydScWSUn/IGty0qER5jC1Ofo58UhBCKtGNkt6E5fNQgFLAt0kcc4MZ9/MlRZs2eYZgYwN/s8ngmfgcUKFky4pnyTDt7MKOVHyV9pCbkpFiVXNEHkwzm8D13XBYTDtV2dDw4dWPTZMHsmct6hp+qiiTg80m/88tXbh1Xf3iTS/p0g+i/z5J/HrGhmgpbe2ii3RrOaDTdSopKb4QmVv7O4Ju5F5aJgcaFnxdCXEZIcMEmxzgxemV8uzxql4qk4iX3i8QdwpYDtjU++kkopTD7rsK9HT305xvkkLo5dGB2zwFZpsc+81kxC/pmaiGdRaGNbwEYZ+OXxY2Dgvb1HN6OiXoKFYJkhCujLdrmcHMOb3A/HJneKPMMrpN118W8pmcMdVRO91bgE5QOiBeDciXy0PFwNsMXhTH8bLlfW/LzSpArZDiXRU3UZI8MhvRaXfZljXJTp3eT24Hm21rQJvIIYsuMOCnG3OxTbUIorcfGDI/10yuXsdCadt2XFZPYVb0ArjZGEaC8AWMDc0ybWd4w1Bu2BjyboXyShhGpMaAtAHbaNjwoqxui6tTLKtCB6pe4HxL25VbMrSQYal1FtjiQ6MHA8s9RX3BNjwLpWzbJkH/wwtOkFGKo4J00Fre8aAOVLb7p4uN5AvLRQf7C9OfYevqhwyFzPAHQXY7D+HCk7nOPQGBm1qEjyNHR83nX2AZm1Ql4ZzvXkHn9Squgih0U7fUxTNSI5MZmQy2ogKispUQgrdLaeb2jF/OjSO+ifM/d6H5CBy4d9+pGBnOSEMI8cu5y+3A4M4FhlRfWQ2UdaOQXXCP7TjrmV1XNz6b6RBzdxbqaAdNPa5RXGXga87XXY5Jao3rBmQ06Yto9OACrupBYCTBMzEkgzpeXxz2ekSIr5uQ==