The "lscpu" command is used to display the information about your CPU in human-readable format. Gather CPU data for a Linux instance other than the instance from which the lscpu command is issued. The specified directory is the system root of the Linux instance to be inspected. I checked the output of the command : rpm -ql 'util-linux' | grep 'lscpu*' and found that lscpu does not exist. Could you please confirm whether lscpu is available for RHEL 5.6 and is it available in util-linux-2.13-0.56.el5 package ? It supports both online and offline CPUs. The specified directory is the system root of the Linux instance to be inspected. The default is to print the sets in list format (for example 0,1). You can see the lscpu command output using the following video: If you liked this page, please support my work on Patreon or with a donation . -x, --hex Use hexadecimal masks for CPU sets (for example "ff"). The lscpu command is part of the util-linux package, so don't bother about installation. But If it is not available then you can install the software from where this command comes. The specified directory is the system root of the Linux instance to be inspected. Get the latest tutorials on SysAdmin, Linux/Unix, Open Source/DevOps topics: $ yum install util-linux No command 'lscpi' found, did you mean: Command 'lscpu' from package 'util-linux' (main) Command 'lscp' from package 'nilfs-tools' (universe) Command 'lspci' from package 'pciutils' (main) lscpi: command not found I've installed pciutils from Synaptic, and I'm using Ubuntu 12.04. The default is to print the sets in list format (for example 0,1). -s, --sysroot directory Gather CPU data for a Linux instance other than the instance from which the lscpu command is issued. lscpu: new command Add a lscpu(1) utility program. {c,1} to sys-utils/Makefile.am - add NLS suport - complete code refactoring ] Co-Author: Karel Zak Signed-off-by: Cai Qian Signed-off-by: Karel Zak I also followed this link: lscpu. −x, −−hex. description. Examples: '-p=cpu,node' or '--parse=cpu,node'. whereis also gives blank output for lscpu. -x, --hex Use hexadecimal masks for … lscpu gathers CPU architecture information like number of CPUs, threads, cores, sockets, NUMA nodes, information about CPU caches, CPU family, model, bogoMIPS, byte order and stepping from sysfs and /proc/cpuinfo, and prints it in a human-readable format. By default, this command should present in your Linux system. Use hexadecimal masks for CPU sets (for example 0x3). 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