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Is printf a Posix?
Note that this printf utility, like the printf() function defined in the System Interfaces volume of POSIX. No provision is made in this volume of POSIX. 1-2017 which allows field widths and precisions to be specified as ‘*’ since the ‘*’ can be replaced directly in the format operand using shell variable substitution.
Is Alexa used to spy?
Patent applications from Amazon and Google revealed how their Alexa and Voice Assistant powered smart speakers are ‘spying’ on you. It says patents reveal the devices’ possible use as surveillance equipment for massive information collection and intrusive digital advertising.
Does printf thread safe?
To ensure that your use of tmpnam() is thread-safe, supply your own buffer space. the standard C printf() and scanf() functions use stdio so they are thread-safe. the standard C printf() function is susceptible to changes in the locale settings if called in a multithreaded program.
Where are echoes most likely to be heard?
Echoes can be heard in small spaces with hard walls, like wells, or where there are lots of hard surfaces all around. That is why echoes can be heard in a canyon, cave, or mountain range.
How is the ECHO command used in Linux?
The echo command is one of the most basic and frequently used commands in Linux. The arguments passed to echo are printed to the standard output. echo is commonly used in shell scripts to display a message or output the results of other commands. echo is a shell builtin in Bash and most of the other popular shells like Zsh and Ksh.
How are sound waves reflected in an echo?
Echoes. Toggle text. An echo is a sound that is repeated because the sound waves are reflected back. Sound waves can bounce off smooth, hard objects in the same way as a rubber ball bounces off the ground. Although the direction of the sound changes, the echo sounds the same as the original sound.
Is there a shell built in for Echo?
echo is a shell builtin in Bash and most of the other popular shells like Zsh and Ksh. Its behavior is slightly different from shell to shell. There is also a standalone /usr/bin/echo utility, but usually, the shell built-in version will take precedence.