R

raid-check:-

ranlib:- generate index to archive.

raw:- is  used to bind a Linux raw character device to a block device.

rct:- Displays information (headers) about or size and statistics of a entitlement, product, or identity certificate used by Red Hat Subscription Manager.

rdate:- get the time via the network

rdisc:- network router discovery daemon

read:-

readarray:-

readelf:- Displays information about ELF files.

readlink:- print resolved symbolic links or canonical file names

readonly:-

readprofile:- read kernel profiling information

realpath:- print the resolved path

reboot:- halt, poweroff, reboot - Halt, power-off or reboot the machine

recode-sr-latin:- convert Serbian text from Cyrillic to Latin script

red:- Ed - line-oriented text editor

redhat-support-tool:-

regdbdump:- parse and print out regulatory rules file

rename:- rename files

renice:- alter priority of running processes

repoclosure:- display a list of unresolved dependencies for a yum repository

repodiff:- list differences between two or more Yum repositories

repo-graph:- output a full package dependency graph in dot format

repomanage:- list the newest or oldest RPM packages in a directory

repoquery:- query information from Yum repositories

repo-rss:- generates an RSS feed from one or more Yum repositories

report-cli:- Work with ABRT problem directories from command line.

reporter-mailx:- Sends contents of a problem directory via email.

reporter-rhtsupport:- Reports problem to RHTSupport.

reporter-ureport:- Reports ABRT problems in format of micro report

reposync:- synchronize yum repositories to a local directory

repotrack:- track a package and its dependencies and download them

repquota:- summarize quotas for a filesystem

request-key:- Handle key instantiation callback requests from the kernel

reset:- tset, reset - terminal initialization.

resize2fs:- ext2/ext3/ext4 file system resizer

resizecons:- change kernel idea of the console size

resizepart:- is a program that informs the Linux kernel of new partition size.

restorecon:- restore file(s) default SELinux security contexts.

return:-

rev:- reverse lines of a file or files (Ex:- rev file)

rfkill:- tool for enabling and disabling wireless devices

rhn-channel:- spacewalk-channel - Subscribe to or unsubscribe system from channel.

rhn_check:- Check for and execute queued actions on RHN.

rhn-profile-sync:- Update system information on Spacewalk server.

rhn_register:- Connect to Spacewalk Server, Red Hat Satellite or Red Hat Network Classic.

rhnreg_ks:- A program for non interactively registering systems to Spacewalk Server, Red Hat Satellite or Red Hat Network Classic.

rhnsd:- A program for querying the Spacewalk server for updates and information.

rhsmcertd:- Periodically scans and updates the entitlement certificates on a registered system.

rhsm-debug:- Compiles information about system's entitlements, products, and identity used by Red Hat Subscription Manager.

rm:- remove files or directories

rmail:-

rmail.postfix:-

rmdir:- remove empty directories

rmmod:- Simple program to remove a module from the Linux Kernel

rnano:- Restricted mode for Nano's ANOther editor, an enhanced free Pico clone

rngd:- Check and feed random data from hardware device to kernel random device

rngtest:- Check the randomness of data using FIPS 140-2 tests

route:- show / manipulate the IP routing table (Ex:- route)

routef:- list routes with pretty output format

routel:- list routes with pretty output format

rpcbind:- universal addresses to RPC program number mapper

rpcdebug:- set and clear NFS and RPC kernel debug flags

rpcgen:-

rpc.gssd:- To establish GSS security contexts using these credential files, the Linux kernel RPC client depends on a userspace daemon called  rpc.gssd.   The  rpc.gssd daemon uses the rpc_pipefs filesystem to communicate with the kernel.

rpc.idmapd:- is the NFSv4 ID <-> name mapping daemon.  It provides functionality to the NFSv4 kernel client and server, to which it communicates via upcalls, by translating user and group IDs to names, and vice versa.

rpcinfo:- report RPC information

rpc.mountd:- The  rpc.mountd  daemon  implements  the  server  side  of  the  NFS  MOUNT protocol, an NFS side protocol used by NFS version 2 [RFC1094] and NFS version 3 [RFC1813].

rpc.nfsd:- The  rpc.nfsd program implements the user level part of the NFS service. The main functionality is handled by the nfsd kernel module. The user space program merely specifies what sort of sockets the kernel service should listen on, what NFS versions it should support, and how many kernel threads it should use.

rpc.rquotad:- server which returns quotas for a user of a local filesystem which is mounted by a remote machine over the NFS.

rpc.statd:- File locks are not part of persistent file system state.  Lock state is thus lost when a host reboots.

rpc.svcgssd:- The  rpcsec_gss  protocol  gives a means of using the gss-api generic security api to provide security for protocols using rpc (in particular, nfs).

rpm:- RPM Package Manager

rpm2cpio:- Extract cpio archive from RPM Package Manager (RPM) package.

rpmdb:- RPM Database Tool

rpmkeys:- RPM Keyring

rpmquery:-

rpmverify:-

rsync:- a fast, versatile, remote (and local) file-copying tool

rsyslogd:- reliable and extended syslogd

rsyslog-recover-qi.pl:-

rtacct:- nstat, rtacct - network statistics tools.

rtcwake:- enter a system sleep state until specified wakeup time

rtmon:- listens to and monitors RTnetlink

rtpr:-

rtstat:- unified linux network statistics

runcon:- run command with specified SELinux security context

runlevel:- Print previous and current SysV runlevel (Ex:- runlevel)

run-parts:- configuration and scripts for running periodical jobs

runuser:- run a command with substitute user and group ID

rvi:- Vi IMproved, a programmers text editor

rview:- Vi IMproved, a programmers text editor

rvim:- Vi IMproved, a programmers text editor