MacでもUNIX系でもお手軽にいける方法
$ cat /dev/random | uuencode - | haed
begin 644 -
M3TR9N$P^9K=J.0RC\:+/KR3>&DQ-7+#1Q5.NK+H:?YM95<.C$#1A
MM!#`XR(`Z/==%G+`4_MGX.AI/5@FSARU^89_RF$SV`?B45X0?U10C2D))I".
M"1Z64E37NWWLAT`*M:04,*/T.K@:U/]+#@PE#?&D?)7A@YF)NICX]3%`P[IZ
M\_B.M&/)N/9FO.(V?F)0.NS'WRJ/8<]:Q\4QBOW!=:9&Y[;A9QPK_Y<6"&BC
M&BKI6O\4XJ"\MT03GM,43!L8(*E
M>97P#H1:/;!P84^3OH3B,
MFD^C?8LA3KC9BY8*D=.@`6VAOQ+.:I9C[GK7AY]2S>.*3'@9MK>3O`Q.]I,L
MIPJ@4!=%,R$SXA$QVWE16X7=C?J_MK9=&/BR1M3JL"X-%1P0H?[]`.IL%8C<
M89J("K>JG)(+E:/G4>`VE.;(Q8`L1]^]B7V\3`OP95%OD8*"T4>Y7*+$H_)/
最初はかならずMで始まるのでそこは抜く。あとは適当に文字をひろう。もう少しエレガントにBase64でエンコード
$ cat /dev/random | openssl base64 | haed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でとめる。
opensslが入ってないばあいはperlで
cat /dev/random | perl -e 'use MIME::Base64;while(read(STDIN, $buf, 60*57)){ print encode_base64($buf),"\n"}' | sed -n '1,10p'
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