/dev/null is a special file that acts as a "data sink" — anything written to it is discarded and ignored. It is commonly used to suppress unwanted output from commands, both standard output (stdout) and error output (stderr). Common Uses: Discard standard output : command /dev/null Discard error output : command 2/dev/null Discard both : command /dev/null 2&1
What does the following command do? find /var/log -name "*.log" 2/dev/null | tee (grep -i "error" errors.txt) | wc -l

Question

/dev/null  is a special file that acts as a "data sink" — anything written to it is discarded and ignored. It is commonly used to suppress unwanted output from commands, both standard output (stdout) and error output (stderr). Common Uses:  Discard standard output :  command > /dev/null Discard error output :  command 2>/dev/null Discard both :  command > /dev/null 2>&1 
  What does the following command do? find /var/log -name "*.log" 2>/dev/null | tee >(grep -i "error" > errors.txt) | wc -l

Accepted Answer

c.  
 It searches for all .log files in /var/log, counts the total number of .log files, and saves lines containing "error" in errors.txt.

Answer

a.  
 It displays the total number of .log files found in /var/log, and searches for "error" in  each file to save matching lines in errors.txt.

Answer

b.  
  It displays all lines containing "error" from .log files in /var/log, and then counts the  number of .log files.

Answer

d.  
  It searches for .log files in /var/log, sorts them, and saves those containing "error" in  errors.txt.

Crowdly

/dev/null is a special file that acts as a "data sink" — anything written to i...

Common Uses:

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