Trending questions in Linux Administration

+3 votes
6 answers

Error: dpkg frontend is locked by another process

First, find out the id of the process that ...READ MORE

Aug 7, 2019 in Linux Administration by Sirajul
 • 58,950 points • 82,366 views
0 votes
2 answers

What does file permission 755 mean?

Hi, File permission 755 means that the directory ...READ MORE

Dec 9, 2020 in Linux Administration by MD
 • 94,990 points • 71,533 views
0 votes
3 answers

How to uninstall Apache2 on Ubuntu?

apache2 is a meta package that just selects ...READ MORE

Dec 13, 2020 in Linux Administration by Gitika
 • 65,850 points • 33,736 views
0 votes
3 answers

Setting JAVA_HOME in linux

Hello fellow techies, Assuming you use bash shell ...READ MORE

Dec 9, 2020 in Linux Administration by Rajiv
 • 8,880 points • 22,433 views
0 votes
1 answer

-bash: cd: /root/: Permission denied

Hi@akhtar, You got this error because your user ...READ MORE

Aug 13, 2020 in Linux Administration by MD
 • 94,990 points • 5,279 views
0 votes
1 answer

I want to swap from AWS to linux.

Hi@Abdullah, Are you talking about swap partition in ...READ MORE

Dec 9, 2020 in Linux Administration by MD
 • 94,990 points • 35 views
0 votes
1 answer

What is Htpasswd in Linux?

Hi@akhtar, htpasswd is used to create and update ...READ MORE

Dec 2, 2020 in Linux Administration by MD
 • 94,990 points • 44 views
0 votes
1 answer

How to create HTTP user using htpasswd command?

Hi@akhtar, Htpasswd command is available in the Linux ...READ MORE

Dec 2, 2020 in Linux Administration by MD
 • 94,990 points • 30 views
0 votes
1 answer

How to create directory of current username in ruby on Linux server

Hi, The command whoami is used to know ...READ MORE

Nov 25, 2020 in Linux Administration by MD
 • 94,990 points • 41 views
0 votes
1 answer

E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/g/git/git-man_2.17.1-1ubuntu0.4_all.deb 404 Not Found [IP: 43.255.166.254 80]

Hi@akhtar, There may be many reasons behind this error. ...READ MORE

Nov 19, 2020 in Linux Administration by MD
 • 94,990 points • 150 views
0 votes
2 answers

Job for httpd.service failed because the control process exited with error code.

Hi guys I was facing same problem as ...READ MORE

Nov 21, 2020 in Linux Administration by anonymous
 • 140 points • 3,880 views
0 votes
2 answers

activation of network connection failed in Linux.

नेटवर्क कनेक्शन चाहिए READ MORE

Aug 18, 2020 in Linux Administration by anonymous
 • 140 points • 5,997 views
0 votes
1 answer

Can we patch azure linux vm using ansible?

Hi@avinash, You can connect your Azure VM from ...READ MORE

Oct 29, 2020 in Linux Administration by akhtar
 • 38,120 points • 106 views
0 votes
1 answer

Copy files from one Linux system to another Linux system.

Hi@akhtar, You can copy your files from one ...READ MORE

Oct 20, 2020 in Linux Administration by MD
 • 94,990 points • 67 views
0 votes
1 answer

How to create nested directories with a single command in linux?

Try this command. mkdir -p /parent_dir/son_dir READ MORE

Oct 19, 2020 in Linux Administration by anonymous
 • 19,580 points • 86 views
0 votes
1 answer

How to sort text alphabetically in Linux system?

Hi@akhtar, In the Linux system, you will find ...READ MORE

Oct 19, 2020 in Linux Administration by MD
 • 94,990 points • 67 views
0 votes
1 answer

Select sections of text from each line of files in a Bash shell.

Hi@akhtar, There is no inbuild command available for ...READ MORE

Oct 19, 2020 in Linux Administration by MD
 • 94,990 points • 58 views
0 votes
1 answer

Select unique lines along with their count in Linux.

Hi@akhtar, You can find the unique entries from ...READ MORE

Oct 19, 2020 in Linux Administration by MD
 • 94,990 points • 44 views
0 votes
1 answer

How to find the first field from a file in Bash Shell?

Hi@akhtar, You can extract text from a file. ...READ MORE

Oct 19, 2020 in Linux Administration by MD
 • 94,990 points • 45 views
0 votes
1 answer

chmod: changing permissions of '/root/': Operation not permitted

Hi@akhtar, You got this error because your user ...READ MORE

Aug 13, 2020 in Linux Administration by MD
 • 94,990 points • 2,845 views
0 votes
1 answer

How to run one command inside another command in Linux?

Hi@akhtar, You can run multiple commands in your ...READ MORE

Oct 14, 2020 in Linux Administration by MD
 • 94,990 points • 80 views
0 votes
1 answer

What is the linux command to find Memory and CPU usage in percent for last 30 days?

Try the following: Cat proc/meminfo top top -i less /proc/memin ...READ MORE

Oct 14, 2020 in Linux Administration by Kim
 • 66 views
0 votes
1 answer

How to find Resident Set Size of a process in Linux?

Hi@akhtar, RSS is a memory currently used by ...READ MORE

Oct 12, 2020 in Linux Administration by MD
 • 94,990 points • 97 views
0 votes
1 answer

How to measure the time required to run a program?

Hi@akhtar, You can use the time command in ...READ MORE

Oct 12, 2020 in Linux Administration by MD
 • 94,990 points • 86 views
0 votes
1 answer

Dynamic real-time view of the running system in Linux.

Hi@akhtar, The top command is used to show the ...READ MORE

Oct 12, 2020 in Linux Administration by MD
 • 94,990 points • 63 views
0 votes
1 answer

Error lscpu: command not found.

Hi@akhtar, By default, this command should present in ...READ MORE

Oct 11, 2020 in Linux Administration by MD
 • 94,990 points • 56 views
0 votes
1 answer

How to find the process ID of a program?

Hi@akhtar, You can find one program named pgrep ...READ MORE

Oct 12, 2020 in Linux Administration by MD
 • 94,990 points • 44 views
0 votes
1 answer

How to gather CPU architecture information of a Linux system?

Hi@akhtar, You can use lscpu command to check ...READ MORE

Oct 11, 2020 in Linux Administration by MD
 • 94,990 points • 48 views
0 votes
1 answer

Kali linux installation

Hi@Kojokojo, You can check your partitions using the ...READ MORE

Oct 11, 2020 in Linux Administration by MD
 • 94,990 points • 35 views
0 votes
1 answer

How to configure Gmail in centos7 to send notifications to specific email id's ?

Hi@Shashl, You can use python script in your ...READ MORE

Oct 5, 2020 in Linux Administration by MD
 • 94,990 points • 55 views
0 votes
1 answer

How to display captured packets in HEX and ASCII in Linux?

Hi@akhtar, To display the packet value you can ...READ MORE

Oct 4, 2020 in Linux Administration by MD
 • 94,990 points • 72 views
0 votes
1 answer

Capture and Save Packets in a File in Linux.

Hi@akhtar, You can use tcpdump command to save ...READ MORE

Oct 4, 2020 in Linux Administration by MD
 • 94,990 points • 52 views
0 votes
1 answer

How to capture Packet from specific port?

Hi@akhtar, Let’s say you want to capture packets ...READ MORE

Oct 4, 2020 in Linux Administration by MD
 • 94,990 points • 44 views
0 votes
1 answer

Capture packets from destination IP in Linux.

Hi@akhtar, To capture packets from destination IP, say you ...READ MORE

Oct 4, 2020 in Linux Administration by MD
 • 94,990 points • 41 views
0 votes
1 answer

How to capture only TCP packets in Linux?

Hi@akhtar, You can use tcpdump command for this ...READ MORE

Oct 4, 2020 in Linux Administration by MD
 • 94,990 points • 41 views
0 votes
1 answer

How to display available interfaces in Linux system?

Hi@akhtar, You can use tcpdump command in your ...READ MORE

Oct 4, 2020 in Linux Administration by MD
 • 94,990 points • 37 views
0 votes
1 answer

How to capture Packets from Specific Interface in Linux?

Hi@akhtar, You can use tcpdump command in your ...READ MORE

Oct 3, 2020 in Linux Administration by MD
 • 94,990 points • 40 views
0 votes
1 answer

How to Install tcpdump in Linux?

Hi@akhtar, Many Linux distributions already shipped with tcpdump tool, if ...READ MORE

Oct 3, 2020 in Linux Administration by MD
 • 94,990 points • 40 views
0 votes
1 answer

How to change the current time in Linux system?

Hi@akhtar, You can use timedatectl command in your ...READ MORE

Sep 24, 2020 in Linux Administration by MD
 • 94,990 points • 46 views
0 votes
1 answer

How to stop automatic time update in Linux?

Hi@akhtar, You can find one command in the ...READ MORE

Sep 24, 2020 in Linux Administration by MD
 • 94,990 points • 40 views
0 votes
1 answer

How to delete an exported environment variable?

Hi@akhtar, To set an environment we used export ...READ MORE

Sep 22, 2020 in Linux Administration by MD
 • 94,990 points • 55 views
0 votes
1 answer

How to find all files containing specific text on Linux?

Hi@akhtar, Linux systems have one interesting command name grep. ...READ MORE

Sep 22, 2020 in Linux Administration by MD
 • 94,990 points • 52 views
0 votes
1 answer

ls: cannot open directory '.': Permission denied

Hi@akhtar, You got this error because your user ...READ MORE

Aug 13, 2020 in Linux Administration by MD
 • 94,990 points • 1,704 views
+1 vote
1 answer

Failed to start Crash recovery kernel arming.

Hi@akhtar, To avoid this error you can follow ...READ MORE

May 11, 2020 in Linux Administration by MD
 • 94,990 points • 4,748 views
0 votes
1 answer

Error while installing Let's Encrypt SSL on My Website

Hi@Hitesh, There may be a firewall issue. Check ...READ MORE

Aug 24, 2020 in Linux Administration by MD
 • 94,990 points • 129 views
0 votes
1 answer

How to check permissions of a folder in the Linux system?

Hi@akhtar, You can use ls command to check ...READ MORE

Aug 13, 2020 in Linux Administration by MD
 • 94,990 points • 224 views
0 votes
1 answer

How to check permissions of a file in the Linux system?

Hi@akhtar, If you prefer using the command line, ...READ MORE

Aug 13, 2020 in Linux Administration by MD
 • 94,990 points • 196 views
0 votes
1 answer

How to change the owner of any folder in Linux system?

Hi@akhtar, Linux system has one command named chown. This ...READ MORE

Aug 13, 2020 in Linux Administration by MD
 • 94,990 points • 128 views
0 votes
1 answer

How to change the group of a folder in Linux system?

Hi@akhtar, You can use chgrp command in your ...READ MORE

Aug 14, 2020 in Linux Administration by MD
 • 94,990 points • 91 views
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