error : storage class specified for parameter
Chances are you’ve forgotten a semicolon in a header file someplace. Make sure each line ends in ;
linux
How to use sed to extract substring
You want awk. This would be a quick and dirty hack: awk -F “\”” ‘{print $2}’ /tmp/file.txt
List all mounts in Linux
There is no such command, since there is no list of “attempted mounts”. You can compare the current mount list (/etc/mtab) to the list of shares registered to be mounted though (/etc/fstab). Alternatively you could try to grep through the system log files to find failed mount attempts.
Using grep and ls -a commands
Using an ls –a and grep, how would you list the name of all of the files in /usr starting with the letter p or the letter r or the letter s using a single grep command? would this be right?
Bash script prints “Command Not Found” on empty lines
Make sure your first line is: Enter your path to bash if it is not /bin/bash Try running: That wil convert line endings, etc from Windows to unix format. i.e. it strips \r (CR) from line endings to change them from \r\n (CR+LF) to \n (LF). More details about the dos2unix command (man page) Another … Read more
Apache server keeps crashing, “caught SIGTERM, shutting down”
SIGTERM is used to restart Apache (provided that it’s setup in init to auto-restart): http://httpd.apache.org/docs/2.2/stopping.html The entries you see in the logs are almost certainly there because your provider used SIGTERM for that purpose. If it’s truly crashing, not even serving static content, then that sounds like some sort of a thread/connection exhaustion issue. Perhaps … Read more
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.
“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.
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
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?