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- bash - Shell equality operators (=, ==, -eq) - Stack Overflow
It depends on the Test Construct around the operator Your options are double parentheses, double brackets, single brackets, or test If you use ((…)), you are testing arithmetic equality with == as in C: $ (( 1==1 )); echo $? 0 $ (( 1==2 )); echo $? 1 (Note: 0 means true in the Unix sense and a failed test results in a non-zero number ) Using -eq inside of double parentheses is a syntax
- unix - How to check permissions of a specific directory . . . - Stack . . .
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
- The UNIX® Standard | www. opengroup. org
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 includes a rich feature set, and its core volumes are simultaneously the IEEE Portable Operating System Interface (POSIX) standard and the ISO IEC 9945 standard
- What does the line #! bin sh mean in a UNIX shell script?
When you try to execute a program in unix (one with the executable bit set), the operating system will look at the first few bytes of the file These form the so-called "magic number", which can be used to decide the format of the program and how to execute it
- unix - How to get PID of process by specifying process name and store . . .
a way to avoid the "grep -v grep" is to use "grep <process nam [e]>" so it interpolates the string and the process nam [e] isn't found when the first grep executes, if that makes sense
- How do I execute a bash script in Terminal? - Stack Overflow
A: To "execute this script" from the terminal on a Unix Linux type system, you have to do three things: 1 Tell the system the location of the script (pick one) # type the name of the script with the full path > path to script sh # execute the script from the directory it is in > script sh # place the script in a directory that is on the PATH
- unix - How to use echo command to print out content of a text file . . .
I am trying to figure out what is the usage of this command: echo lt; a txt According to text book it should redirect a programs standards input Now I am redirecting a txt to echo but instead of
- bash - Writing outputs to log file and console - Stack Overflow
In Unix shell, I have a env file (env file defines the parameters required for running the user script like log file name and path, redirect outputs and errors to log file, database connection deta
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