How can I use grep to show just filenames on Linux?
The standard option grep -l (that is a lowercase L) could do this. From the Unix standard: You also do not need -H in this case.
linux
“find: paths must precede expression:” How do I specify a recursive search that also finds files in the current directory?
Try putting it in quotes — you’re running into the shell’s wildcard expansion, so what you’re acually passing to find will look like: …causing the syntax error. So try this instead: Note the single quotes around your file expression — these will stop the shell (bash) expanding your wildcards.
Java command not found on Linux
You can add one of the Java path to PATH variable using the following command. You can add this line to .bashrc file in your home directory. Adding this to .bashrc will ensure everytime you open bash it will be PATH variable is updated.
C fopen vs open
First, there is no particularly good reason to use fdopen if fopen is an option and open is the other possible choice. You shouldn’t have used open to open the file in the first place if you want a FILE *. So including fdopen in that list is incorrect and confusing because it isn’t very … Read more
what is update-alternatives command in linux and what is the use of it?
while installation of java in Linux there is some usage of update-alternatives command since i am new to Linux environment i want to know what this command does and what is the use of it
make -j 8 g++: internal compiler error: Killed (program cc1plus)
When I deploy Apache Mesos on Ubuntu12.04, I follow the official document, in step “make -j 8” I’m getting this error in the console: what should I do?
How to recursively download a folder via FTP on Linux
You could rely on wget which usually handles ftp get properly (at least in my own experience). For example: You can also use -m which is suitable for mirroring. It is currently equivalent to -r -N -l inf. If you’ve some special characters in the credential details, you can specify the –user and –password arguments … Read more
How do I install chkconfig on Ubuntu?
The command chkconfig is no longer available in Ubuntu.The equivalent command to chkconfig is update-rc.d.This command nearly supports all the new versions of ubuntu. The similar commands are
C++ : Exception occurred in script: basic_string::_S_construct NULL not valid
You cannot return NULL (or 0) from a function that is declared to return string because there is no appropriate implicit conversion. You might want to return an empty string though or If you want to be able to distinguish between a NULL value and an empty string, then you will have to use either … Read more
How to install Android SDK on Ubuntu?
Option 1: The location of Android SDK on Linux can be any of the following: /home/AccountName/Android/Sdk /usr/lib/android-sdk /Library/Android/sdk/ /Users/[USER]/Library/Android/sdk Option 2: Download the Android Studio. Extract downloaded .zip file.The extracted folder name will read somewhat like android-studio To keep navigation easy, move this folder to Home directory. After moving, copy the moved folder by right clicking it. This action will place … Read more