c2ph:- c2ph, pstruct - Dump C structures as generated from "cc -g -S" stabs
c99:- The c99 utility is an interface to the standard C compilation system; it shall accept source code conforming to the ISO C standard.
cacertdir_rehash:- cacertdir_rehash is a simple shell script that is called by authconfig and authconfig-gtk. It uses openssl command line utility to create hash symbolic links of certificate files in the specified directory.
cache_check:- cache_check - repair cache metadata on device or file
cache_dump:- cache_dump - dump cache metadata from device or file to standard output
cache_repair:- reads binary cache metadata created by the respective device-mapper target from one device or file , repairs it and writes it to another device or file.
cache_restore:- restore cache metadata file to device or file
cal:- displays a simple calendar. If no arguments are specified, the current month is displayed.
capsh:- Linux capability support and use can be explored and constrained with this tool.
captoinfo:- convert a termcap description into a terminfo description
cat:- concatenate files and print on the standard output
catman:- create or update the pre-formatted manual pages
cbq:- Class Based Queueing
certutil:- certutil - Manage keys and certificate in both NSS databases and other NSS tokens
cfdisk:- display or manipulate disk partition table Ex:- cfdisk
c++filt:- Demangle C++ and Java symbols.
chacl:- change the access control list of a file or directory
chage:- change user password expiry information
chat:- Automated conversational script with a modem
chattr:- change file attributes on a Linux file system
chcon:- change file SELinux security context
chcpu:- can modify the state of CPUs. It can enable or disable CPUs, scan for new CPUs, change the CPU dispatching mode of the underlying hypervisor, and request CPUs from the hypervisor (configure) or return CPUs to the hypervisor (deconfigure).
chfn:- change your finger information
chgrp:- change group ownership
chkconfig:- updates and queries runlevel information for system services
chmod:- change file mode bits
chown:- change file owner and group
chpasswd:- update passwords in batch mode
chronyc:- command-line interface for chronyd
chronyd:- chrony is a pair of programs for maintaining the accuracy of computer clocks. chronyd is a
background daemon program that can be started at boot time.
chroot:- run command or interactive shell with special root directory
chrt:- manipulate the real-time attributes of a process
chsh:- is used to change your login shell. If a shell is not given on the command line, chsh prompts for one.
chvt:- change foreground virtual terminal
cifsiostat:- The cifsiostat command displays statistics about read and write operations on CIFS filesystems.
cksum:- Print CRC checksum and byte counts of each FILE.
clear:- clear the terminal screen
clock:- hwclock is a tool for accessing the Hardware Clock. You can display the current time, set the Hardware Clock to a specified time, set the Hardware Clock from the System Time, or set the System Time from the Hardware Clock.
clockdiff:- measure clock difference between hosts
cmp:- compare two files byte by byte
cmsutil:- Performs basic cryptograpic operations, such as encryption and decryption, on Cryptographic Message Syntax (CMS) messages.
col:- filter reverse line feeds from input
colcrt:- provides virtual half-line and reverse line feed sequences for terminals without such capability, and on which overstriking is destructive.
colrm:- remove columns from a file
column:- The column utility formats its input into multiple columns. Rows are filled before columns. Input is taken from file or, by default, from standard input. Empty lines are ignored.
comm:- compare two sorted files line by line
consolehelper:- A wrapper that helps console users run system programs
consolehelper-gtk:- A helper program for consolehelper
consoletype:- print type of the console connected to standard input
convertquota:- convert quota from old file format to new one.
cp:- copy files and directories.
cpio:- copy files to and from archives.
cpp:- The C Preprocessor
cpupower:- Shows and sets processor power related values
cracklib-check:- Check passwords using libcrack2.
cracklib-format:- cracklib-format takes a list of text files each containing a list of words, one per line, It lowercases all words, removes control characters, and sorts the lists.
cracklib-packer:- cracklib-format takes a list of text files each containing a list of words, one per line, It lowercases all words, removes control characters, and sorts the lists.
cracklib-unpacker:- cracklib-format takes a list of text files each containing a list of words, one per line, It lowercases all words, removes control characters, and sorts the lists.
crda:- send to the kernel a wireless regulatory domain for a given ISO / IEC 3166 alpha2
create-cracklib-dict:- takes one or more word list files as arguments and converts them into cracklib dictionaries for use by password checking programs.
crlutil:- List, generate, modify, or delete CRLs within the NSS security database file(s) and list, create, modify or delete certificates entries in a particular CRL.
crond:- daemon to execute scheduled commands
crontab:- maintains crontab files for individual users
cryptsetup:- manage plain dm-crypt and LUKS encrypted volumes
csh:- C shell with file name completion and command line editing
csplit:- split a file into sections determined by context lines
ctrlaltdel:- set the function of the Ctrl-Alt-Del combination
ctstat:- unified linux network statistics
curl:- transfer a URLcut:- remove sections from each line of files.