D

date:- print or set the system date and time

db_archive:-

db_checkpoint:-

db_deadlock:-

db_dump:-

db_dump185:-

db_hotbackup:-

db_load:-

db_log_verify:-

db_printlog:-

db_recover:-

db_replicate:-

db_stat:-

db_tuner:-

db_upgrade:-

dbus-binding-tool:-

dbus-cleanup-sockets:-

dbus-daemon:-

dbus-monitor:-

dbus-send:-

dbus-uuidgen:-

db_verify:-

dc:- dc is a reverse-polish desk calculator which supports unlimited precision arithmetic.

dd:- convert and copy a file

deallocvt:- deallocate unused virtual consoles

debugfs:- ext2/ext3/ext4 file system debugger

debuginfo-install:- install debuginfo packages and their dependencies

delpart:- is a program that asks the Linux kernel to remove a partition.

depmod:- Generate modules.dep and map files.

desktop-file-edit:- The  desktop-file-install  program is a tool to install, and optionally edit, desktop files. The desktop-file-edit program is a tool to edit a desktop file. They are mostly useful for developers and packagers.

desktop-file-install:- The  desktop-file-install  program is a tool to install, and optionally edit, desktop files. The desktop-file-edit program is a tool to edit a desktop file. They are mostly useful for developers and packagers.

desktop-file-validate:- Validate desktop entry files

df:- report file system disk space usage

dgawk:- pattern scanning and processing language

dhclient:- Dynamic Host Configuration Protocol Client

dhclient-script:- DHCP client network configuration script

diff:- compare files line by line

diff3:- compare three files line by line

dig:- dig (domain information groper) is a flexible tool for interrogating DNS name servers.

dir:- list directory contents

dircolors:- color setup for ls

dirname:- strip last component from file name

dm_dso_reg_tool:- A utility used to load a DSO into dmeventd and (un)register devices with it for monitoring

dmesg:- print or control the kernel ring buffer

dmeventd:- Device-mapper event daemon

dmevent_tool:- A utility used to load a DSO into dmeventd and (un)register devices with it for monitoring

dmidecode:- dmidecode  is a tool for dumping a computer's DMI (some say SMBIOS) table contents in a human-readable format.

dmraid:- discover, configure and activate software (ATA)RAID

dmraid.static:- discover, configure and activate software (ATA)RAID

dmsetup:- low level logical volume management

dnsdomainname:- Hostname is used to display the system's DNS name, and to display or set its hostname or NIS domain name.

dnsmasq:- is a lightweight DNS, TFTP, PXE, router advertisement and DHCP server. It is intended to provide coupled DNS and DHCP service to a LAN.

domainname:- is used to display the system's DNS name, and to display or set its hostname or NIS domain name.

dosfsck:- fsck.fat verifies the consistency of MS-DOS filesystems and optionally tries to repair them.

dosfslabel:-

dracut:- low-level tool for generating an initramfs image

du:- Summarize disk usage of each FILE, recursively for directories.

dump-acct:- print an acct/pacct file in human-readable format

dumpe2fs:- prints the super block and blocks group information for the filesystem present on device.

dumpkeys:- dumpkeys writes, to the standard output, the current contents of the keyboard driver's translation tables, in the format specified by keymaps(5).

dump-utmp:- dump-acct filename prints a list of all logins. This list is usually written in /var/log/wtmp.

dvigif:- This program makes PNG and/or GIF graphics from DVI files as obtained from TeX and its relatives.

dvipng:- This program makes PNG and/or GIF graphics from DVI files as obtained from TeX and its relatives.