Every Unix file has a set of permissions that determine whether you can read, write, or run the file. Running ls -l displays the permissions. Here’s an example ...
You get this error when you attempt to read or write to a file or directory that you’re not allowed to access (you have insufficient privileges). This error also shows when you try to execute a file that does not have the execute bit set (even if you can read the file). You’ll ...
Set PATH Variable in Linux by Editing ~/.bashrc One of the easiest ways to set a default PATH variable permanently on Linux is by editing the .bashrc file. For those unaware, it is a script file that executes whenever a user logs in to their session and it helps connect user commands ...
Usage: curl [options...]<url> --abstract-unix-socket <path>Connect via abstract Unix domain socket--alt-svc <filename> Enable alt-svc with this cachefile--anyauth Pick any authentication method-a, --append Append to targetfilewhen uploading--basic Use HTTP Basic Authentication--cacert <fil...
set | grep EXAMPLE However,printenvdoes not return any output because a variable created in this way is ashell variable, not an exported environment variable. To verify that it is only a shell variable, start a child shell session by typingbash. Inside the child shell, the variable does no...
="arm64"];thenecho"ARCH is not set correctly.";exit1fifiif["$CROSS_COMPILE"=""];thenecho"CROSS_COMPILE is not set.";exit1fiecho"PetaLinux building environment variable is set.";echo"ARCH:$ARCH"echo-e"CROSS_COMPILE:$CROSS_COMPILE\n"CURRENT_CROSS_CC=`echo$CC| grep aarch64-xilinx-...
set | grep EXAMPLE_VARIABLE EXAMPLE_VARIABLE='example value' How to Export Environment Variables You can turn a shell variable into an environment variable using theexportcommand. The example below creates a variable calledEXAMPLE_VARIABLEand assigns it the valuenew example value. ...
To find all the variables containing a certain character string, use thegrep command: printenv |grep[VARIABLE_NAME] 1. Another command you can use to check environment variables isset. However, this command will also include local variables, as well as shell varia...
This chapter is a guide to the Unix commands and utilities that will be referenced throughout this book. This is preliminary material, and you may ...
#else /* CONFIG_HUGETLB_PAGE_SIZE_VARIABLE */ /* Huge pages are a constant size */ #define pageblock_order HUGETLB_PAGE_ORDER #endif /* CONFIG_HUGETLB_PAGE_SIZE_VARIABLE */ #else /* CONFIG_HUGETLB_PAGE */ /* If huge pages are not used, group by MAX_ORDER_NR_PAGES */ #define...