May 22, 2025 · Single UNIX Specification- “The Standard” The Single UNIX Specification is the standard in which the core interfaces of a UNIX OS are measured. The UNIX standard …

Feb 17, 2010 · From the man page: Sending mail To send a message to one or more people, mailx can be invoked with arguments which are the names of people to whom the mail will be …

How to check if $? is not equal to zero in unix shell scripting? Asked 12 years, 8 months ago Modified 3 years, 8 months ago Viewed 356k times

2 Take a look at Job Control on UNIX systems If you don't have control of your shell, simply hitting ctrl + C should stop the process. If that doesn't work, you can try ctrl + Z and using the jobs …

UNIX certification is a trusted and open system industry standard, ensuring that products conform to the most exacting criteria for portability, compatibility, and global interoperability.

Adding n seconds to 1970-01-01 will give you a UTC date because n – the Unix timestamp – is the number of seconds that have elapsed since 00:00:00 Coordinated Universal Time (UTC), …

I know that using ls -l "directory/directory/filename" tells me the permissions of a file. How do I do the same on a directory? I could obviously use ls -l on the directory higher in the hierarchy...

Sep 8, 2010 · I want to list only the directories in specified path (ls doesn't have such option). Also, can this be done with a single line command?

Jun 23, 2011 · The definition of unix time and the epoch date went through a couple of changes before stabilizing on what it is now. But it does not say why exactly 1/1/1970 was chosen in the …

I am trying to figure out what is the usage of this command: echo < a.txt According to text book it should redirect a programs standards input. Now I am redirecting a.txt to echo but instead of