5 Add comparison to random_read and attribution for @StephenKitt
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Unlimited.

TheIn Linux, comparing the kernel functions named random_read and random_read_unlimited function name seems to indicate indicates that the etymology of the letter u in urandom comes from isunlimited. 

This is confirmed by line 114:

The /dev/urandom device does not have this limit [...]

Update:

Regarding which came first for Linux, /dev/random or /dev/urandom, @Stéphane Chazelas rightly points out thatgave the both were introduced atpost with the same timeoriginal patch and @StephenKitt showed they were both introduced simultaneously.

Unlimited.

The random_read_unlimited function name seems to indicate that the etymology of the letter u in urandom comes from unlimited.

This is confirmed by line 114:

The /dev/urandom device does not have this limit [...]

Update:

Regarding which came first for Linux, /dev/random or /dev/urandom, @Stéphane Chazelas rightly points out that both were introduced at the same time.

Unlimited.

In Linux, comparing the kernel functions named random_read and random_read_unlimited indicates that the etymology of the letter u in urandom isunlimited. 

This is confirmed by line 114:

The /dev/urandom device does not have this limit [...]

Update:

Regarding which came first for Linux, /dev/random or /dev/urandom, @Stéphane Chazelas gave the post with the original patch and @StephenKitt showed they were both introduced simultaneously.

4 specify which OS
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Unlimited.

The random_read_unlimited function name seems to indicate that the etymology of the letter u in urandom comes from unlimited.

This is confirmed by line 114:

The /dev/urandom device does not have this limit [...]

Update:

Regarding which came first for Linux, /dev/random or /dev/urandom, @Stéphane Chazelas rightly points out that both were introduced at the same time.

Unlimited.

The random_read_unlimited function name seems to indicate that the etymology of the letter u in urandom comes from unlimited.

This is confirmed by line 114:

The /dev/urandom device does not have this limit [...]

Update:

Regarding which came first, /dev/random or /dev/urandom, @Stéphane Chazelas rightly points out that both were introduced at the same time.

Unlimited.

The random_read_unlimited function name seems to indicate that the etymology of the letter u in urandom comes from unlimited.

This is confirmed by line 114:

The /dev/urandom device does not have this limit [...]

Update:

Regarding which came first for Linux, /dev/random or /dev/urandom, @Stéphane Chazelas rightly points out that both were introduced at the same time.

3 spelling and ease of reading
source | link

Unlimited.

The random_read_unlimited function name seems to indicate that the etymology of the letter u in urandom comes from unlimited.

This is confirmed by line 114:

The /dev/urandom device does not have this limit [...]

Update:

Disregard the upvotes on my comment below saying thatRegarding which came first, /dev/random existed beforeor /dev/urandom., @Stéphane Chazelas righltyrightly points out that both were introduced at the same time.

Unlimited.

The random_read_unlimited function name seems to indicate that the etymology of the letter u in urandom comes from unlimited.

This is confirmed by line 114:

The /dev/urandom device does not have this limit [...]

Update:

Disregard the upvotes on my comment below saying that /dev/random existed before /dev/urandom. @Stéphane Chazelas righlty points out that both were introduced at the same time.

Unlimited.

The random_read_unlimited function name seems to indicate that the etymology of the letter u in urandom comes from unlimited.

This is confirmed by line 114:

The /dev/urandom device does not have this limit [...]

Update:

Regarding which came first, /dev/random or /dev/urandom, @Stéphane Chazelas rightly points out that both were introduced at the same time.

2 Both were created at the same time
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1
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