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The command ls -l is executed as a process, the output (stdout) of which is piped to the input (stdin) of the process for grep key; and likewise for the process for less. Each process takes input from the previous process and produces output for the next process via standard streams.
lsmod is a command on Linux systems that lists each loadable kernel module that is loaded.. Example output from lsmod: . Module Size Used by af_packet 27392 2 8139too 30592 0 snd_cs46xx 96872 3 snd_pcm_oss 55808 1 snd_mixer_oss 21760 2 snd_pcm_oss ip6table_filter 7424 1 ip6_tables 19728 1 ip6table_filter ipv6 290404 22 xfs 568384 4 sis900 18052 5 libata 169920 1 pata_sis scsi_mod 158316 3 usb ...
Take for example one line in the ls -l output: drwxr-xr-x 2 root root 0 Jan 1 1970 home POSIX specifies [5] the format of the output for the long format (-l option). In particular, the first field (before the first space) is dubbed the "file mode string", here drwxr-xr-x. Its first character describes the file type, here d (directory).
Example usage of tee: The output of ls -l is redirected to tee which copies them to the file file.txt and to the pager less. The name tee comes from this scheme - it looks like the capital letter T. The tee command is normally used to split the output of a program so that it can be both displayed and saved in a file. The command can be used to ...
lsof is a command meaning "list open files", which is used in many Unix-like systems to report a list of all open files and the processes that opened them. This open source utility was developed and supported by Victor A. Abell, the retired Associate Director of the Purdue University Computing Center.
$ umask-S # Show the (frequently initial) setting u=rwx,g=rx,o=rx $ gcc hello.c # compile and create executable file a.out $ ls-l a.out-rwxr-xr-x 1 me developer 6010 Jul 10 17:10 a.out $ # the umask prohibited Write permission for Group and Others $ ls > listOfMyFiles # output file created by redirection does not attempt to set eXecute $ ls-l ...
FUSE was merged into the mainstream Linux kernel tree in kernel version 2.6.14. [8] The userspace side of FUSE, the libfuse library, generally followed the pace of Linux kernel development while maintaining "best effort" compatibility with BSD descendants. This is possible because the kernel FUSE reports its own "feature levels", or versions.
ls, a command specified by POSIX and by the Single UNIX Specification; used for listing files.ls, the internet top-level domain for Lesotho; Link-state routing protocol, used in packet-switching networks; Location Services, a component of Microsoft's System Center Configuration Manager software; LS, a low-power Schottky version of a 7400 series ...