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I'd like to do something like timeout 12s tail -f access.log | wc -l but I'm not seeing the output from wc. What needs to be done to be able to do this?
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wc. The wc command is used to find the number of lines, characters, words, and bytes of a file. To find the number of lines using wc, we add the -l option. This will give us the total number of lines and the name of the file.
How to Use the Bash Sleep Command. Sleep is a very versatile command with a very simple syntax. It is as easy as typing sleep N . This will pause your script for N seconds, with N being either a positive integer or a floating point number.
timeout is a command-line utility that runs a specified command and terminates it if it is still running after a given period of time. In other words, timeout allows you to run a command with a time limit.
Using wc command. wc command is used to know the number of lines, word count, byte and characters count etc. Count the number of words using wc -w. Here, “-w” indicates that we are counting words.
Use --foreground option with timeout:
timeout --foreground 12s tail -f access.log | wc -l
As per man timeout:
--foreground when not running timeout directly from a shell prompt,
allow COMMAND to read from the TTY and get TTY signals;
in this mode, children of COMMAND will not be timed out
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