bash.generate.random.alphanumeric.string.sh
· 999 B · Bash
Brut
#!/bin/bash
# bash generate random alphanumeric string
#
# bash generate random 32 character alphanumeric string (upper and lowercase) and
NEW_UUID=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1)
# bash generate random 32 character alphanumeric string (lowercase only)
cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1
# Random numbers in a range, more randomly distributed than $RANDOM which is not
# very random in terms of distribution of numbers.
# bash generate random number between 0 and 9
cat /dev/urandom | tr -dc '0-9' | fold -w 256 | head -n 1 | head --bytes 1
# bash generate random number between 0 and 99
NUMBER=$(cat /dev/urandom | tr -dc '0-9' | fold -w 256 | head -n 1 | sed -e 's/^0*//' | head --bytes 2)
if [ "$NUMBER" == "" ]; then
NUMBER=0
fi
# bash generate random number between 0 and 999
NUMBER=$(cat /dev/urandom | tr -dc '0-9' | fold -w 256 | head -n 1 | sed -e 's/^0*//' | head --bytes 3)
if [ "$NUMBER" == "" ]; then
NUMBER=0
fi
| 1 | #!/bin/bash |
| 2 | # bash generate random alphanumeric string |
| 3 | # |
| 4 | |
| 5 | # bash generate random 32 character alphanumeric string (upper and lowercase) and |
| 6 | NEW_UUID=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1) |
| 7 | |
| 8 | # bash generate random 32 character alphanumeric string (lowercase only) |
| 9 | cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1 |
| 10 | |
| 11 | # Random numbers in a range, more randomly distributed than $RANDOM which is not |
| 12 | # very random in terms of distribution of numbers. |
| 13 | |
| 14 | # bash generate random number between 0 and 9 |
| 15 | cat /dev/urandom | tr -dc '0-9' | fold -w 256 | head -n 1 | head --bytes 1 |
| 16 | |
| 17 | # bash generate random number between 0 and 99 |
| 18 | NUMBER=$(cat /dev/urandom | tr -dc '0-9' | fold -w 256 | head -n 1 | sed -e 's/^0*//' | head --bytes 2) |
| 19 | if [ "$NUMBER" == "" ]; then |
| 20 | NUMBER=0 |
| 21 | fi |
| 22 | |
| 23 | # bash generate random number between 0 and 999 |
| 24 | NUMBER=$(cat /dev/urandom | tr -dc '0-9' | fold -w 256 | head -n 1 | sed -e 's/^0*//' | head --bytes 3) |
| 25 | if [ "$NUMBER" == "" ]; then |
| 26 | NUMBER=0 |
| 27 | fi |
| 28 |