How to identify and kill zombie process in Linux ?

If you already knows whats zombie process and wanted to identify all zombie process’s in you system, you can directly proceed ahead but if you don’t know, we may suggest you first read the article, “What is Zombie process and How to create zombie process in Linux ?” Lets consider, now you have created the … Read more

Grep and replace string from source code using command in Linux

Recently when we migrated our old code in Android to API level 30 i.e. androidx , lots of headers files got changed, whereas all the other backword compatible code remained same. So to accomplish this migration, we have to rename the header imports to androidx imports, but changing all those thousands of source files manually … Read more

FTP Clients for using on Ubuntu

For testing FTP server connection from Ubuntu command line, we can use following command, $ ftp my_ftp_server_IPConnected to my_ftp_server_IP220———- Welcome to Pure-FTPd [privsep] [TLS] ———-220-You are user number 4 of 50 allowed.220-Local time is now 14:37. Server port: 21.220-This is a private system – No anonymous login220-IPv6 connections are also welcome on this server.220 You … Read more

How to disable and / or enable ICMP ping from Linux host ?

To disable the ICMP ping from certain linux host, lets say which has IP of 192.168.0.100 use below command, Type below command on the console of linux PC on which you are trying to enable / disable the ping. $ sudo iptables -A INPUT -p icmp –icmp-type any -j REJECT $ sudo iptables -A OUTPUT … Read more

How to rename part of a filename and replace the string in those files

If we want to rename only certain part of the filename, for example, we want to change a filename “memory_map.c” to “memory_mapping.c” i.e. we just want to rename “map” to “mapping” of the file, we  can use following command, $ ls -al memory_map.c -rw-rw-r– 1 user user 642 Aug 19 22:53 memory_map.c $ rename ‘s/map/mapping/’ … Read more

How to resolve dependencies generated during installation with “dpkg -i” ?

While I was trying to install chrome browser of a fresh installed ubuntu 14.04 with deb, it reported following error, $ sudo dpkg -i google-chrome-stable_current_amd64.deb dpkg: dependency problems prevent configuration of google-chrome-stable: google-chrome-stable depends on libappindicator1; however: Package libappindicator1 is not installed. dpkg: error processing package google-chrome-stable (–install): dependency problems – leaving unconfigured Errors were … Read more

Convert different video formats (AVI to mp4) using handbrake on Ubuntu

If you want to convert any AVI file to MP4 or compatible to be used in mobiles, you want to that on ubuntu using “HandBreak” and ffmpeg. First, make sure you have handbreak installed on ubuntu, if not you can use below commands to do that, $ sudo add-apt-repository ppa:stebbins/handbrake-releases These are the official HandBrake … Read more

How to Change Hostname for Ubuntu Machine ?

Recently, we wanted to change the hostname of our ubuntu 15.10 / 16.04 machine, $ lsb_release -a No LSB modules are available.Distributor ID: UbuntuDescription: Ubuntu 15.10Release: 15.10Codename: wily Lets, check now what is current hostname, $ hostname new-hostname So, its set to “new-hostname” Now, to change the hostname lets say “my-netbook”, user the command as, … Read more