Commands using getent sorted by votes

Commands using getent (19)

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Query well known ports list

Uses the file located in /etc/services Show Sample Output
This is sample output - yours may be different.
```
$ getent services 80
www                   80/tcp http
$ getent services mail
smtp                  25/tcp mail
$ getent services domain
domain                53/tcp
```
13

getent services <<service>>

unixmonkey4200 · 2011-10-09 14:43:19 5
Get contents from hosts, passwd, groups even if they're in DB/LDAP/other

getent allows to get the contents of several databases in their native file format even if they are not actually in /etc. For example, if you are using a LDAP or a DB to authenticate your users, you won't find their info by catting /etc/passwd, but "getent passwd" will concatenate /etc/passwd to the LDAP/DB. Show Sample Output
This is sample output - yours may be different.
```
$ getent passwd root
root:x:0:0:root:/root:/bin/bash

 $ getent services smtp
smtp                  25/tcp mail

 $ getent protocols l2tp
l2tp                  115 L2TP
```
8

getent [group|hosts|networks|passwd|protocols|services] [keyword]

raphink · 2009-02-16 15:57:26 955
Determine next available UID

better with accounts on ldap Show Sample Output
This is sample output - yours may be different.
```
834
```
4

getent passwd | awk -F: '($3>600) && ($3<10000) && ($3>maxuid) { maxuid=$3; } END { print maxuid+1; }'

bunam · 2010-05-25 12:27:33 46
Terminal - Prints out, what the users name, notifyed in the gecos field, is
This is sample output - yours may be different.
4

getent passwd $(whoami) | cut -f 5 -d: | cut -f 1 -d,

binfalse · 2011-01-07 22:43:09 9
Get just the IP for a hostname

has the benefit of being a bit more cross-platform.
This is sample output - yours may be different.
3

getent hosts google.com | awk '{print $1}'

depesz · 2010-11-03 12:02:05 7
Find which service was used by which port number
This is sample output - yours may be different.
2

getent services <port_number>

unefunge · 2010-11-25 08:30:35 5
Get IP from host

I just wanted a simple DNS request. Because host and nslookup commands are not on all systems, we use getent instead. Thanks aulem for that tip.
This is sample output - yours may be different.
1

getent hosts positon.org | cut -d' ' -f1

dooblem · 2010-08-11 09:06:39 4
Lists all usernames in alphabetical order
This is sample output - yours may be different.
1

getent passwd | cut -d: -f1 | sort

theftf · 2012-09-12 17:16:54 5
force change password for all user

Alternately for those without getent or only want to work on local users it's even easier: cut -d: -f1 /etc/passwd|xargs -n1 passwd -e Note that not all implementations of passwd support -e. On RH it would be passwd -x0 (?) and on Solaris it would be passwd -f.
This is sample output - yours may be different.
0

getent passwd|cut -d: -f1|xargs -n1 passwd -e

romulusnr · 2009-11-18 19:46:15 12
Sometimes you just want a quick way to find out if a certain user account is locked [Linux].

man 5 shadow I think it's more reliable, because passwd -S dont show "locked" but "L" as second field on my Archlinux for a particular user. ( unixhome alternative ).
This is sample output - yours may be different.
0

getent shadow | while IFS=: read a b c; do grep -q '!' <<< "$b" && echo "$a LOCKED" || echo "$a not locked"; done

sputnick · 2009-12-18 15:24:19 5
Sometimes you just want a quick way to find out if a certain user account is locked [Linux].
This is sample output - yours may be different.
0

getent shadow | grep '^[^:]\+:!' | cut -d: -f1

hackele · 2009-12-18 16:24:01 7
Create a QR code image in MECARD format

If your contact information was entered when your user account was created (it gets added to /etc/passwd) then this gets that info and creates a QR code for you automatically
This is sample output - yours may be different.
0

getent passwd $(whoami) | echo "$(perl -ne '/^([^:]+):[^:]+:[^:]+:[^:]+:([^ ]+) ?([^,]+)?,([^,]*),([^,]*),([^:,]*),?([^:,]*)/ and printf "MECARD:N:$3,$2;ADR:$5;TEL:$4;TEL:$6;EMAIL:$1@"')$HOSTNAME;;" | qrencode -o myqr.png

Strawp · 2011-07-25 12:59:57 4
Show crontabs for all users

added echo "### Crontabs for $user ####"; to make clear whose crontab is listed.
This is sample output - yours may be different.
0

for user in $(getent passwd|cut -f1 -d:); do echo "### Crontabs for $user ####"; crontab -u $user -l; done

harpo · 2012-07-11 13:06:17 4
See the members of a group

See the members of a group
This is sample output - yours may be different.
0

getent group <group>

jmorganwalker · 2013-10-31 15:07:49 8
Prints out, what the users name, notifyed in the gecos field, is

Doesn't require finger and should work whatever the underlying auth mechanism is Show Sample Output
This is sample output - yours may be different.
```
Joe D Blogs
```
0

getent passwd `whoami` | cut -d ':' -f 5

timhughes · 2013-12-05 01:37:44 8
Perform a reverse DNS lookup

Short and concise output appropiate for scripts. Show Sample Output
This is sample output - yours may be different.
```
$ getent hosts 128.142.165.72 
128.142.165.72  vocms202.cern.ch
```
0

getent hosts <host>

lulingar · 2014-08-19 13:54:56 8
ip from hostname domain

get the dns recorded ip adress of the domain Show Sample Output
This is sample output - yours may be different.
```
82.165.230.17
82.165.229.138
```
0

getent hosts web.de | awk '{ print $1 }'

aysadk · 2017-01-15 14:34:15 19
get hostname/ip information
This is sample output - yours may be different.
0

getent hosts 8.8.8.8

aysadk · 2017-10-08 13:04:03 35
Deleting all users from the "sudo" group

Don't abuse sudo command! Use superuser as it is supposed to be.
This is sample output - yours may be different.
0

gpasswd -d $(getent group sudo | cut -d: -f4 | tr "," "\n") sudo

wuseman1 · 2024-08-26 18:11:09 9

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Substitute audio track of video file using mencoder

Creates a new video file with video stream copied from input file and a different audio stream

Recursive find and replace file extension / suffix (mass rename files)

Find recursively all files in ~/Notes with the extension '.md' and pipe that via xargs to rename command, which will replace every '.md' to '.txt' in this example (existing files will not be overwritten).

list the top 15 folders by decreasing size in MB

Get free RAM in %

Oneliner to run commands on multiple servers

Oneliner to run commands on multiple servers over ssh. - First parameter "$1" is the command you want to execute remotely. ( It can be multiple commands e.g. "hostname;uptime") - Second parameter "${@:2}" represents the remote host/s you want to run the command/s on.

Fast command-line directory browsing

After typing cd directory [enter] ls [enter] so many times, I figured I'd try to make it into a function. I was surprised how smoothly I was able to integrate it into my work on the command line. Just use cdls as you would cd. It will automatically list the directory contents after you cd into the directory. To make the command always available, add it to your .bashrc file. Not quite monumental, but still pretty convenient.

Copy the contents of one partition to another

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

list block devices

Shows all block devices in a tree with descruptions of what they are.

Job Control

You're running a script, command, whatever.. You don't expect it to take long, now 5pm has rolled around and you're ready to go home... Wait, it's still running... You forgot to nohup it before running it... Suspend it, send it to the background, then disown it... The ouput wont go anywhere, but at least the command will still run...

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Commands using getent (19)

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