I’m trying to calculate a sum numbers positioned on separate lines using C shell. I must do it with specific commands using pipes. There is a number of commands: comand.. | comand.. | (comands…) printing lines in the following form: The result should be 22, since 1 + 2 + 8 + 4 + 7 = 22. I tried …
Tag: shell
Zenity command for multiple file filtering
I tried some Zenity command for file filtering in my java program. and But these are not worked properly . insted of giving the all filtered file it only give the first file type given in the comment ,thant means; in these, it given back only the .gif file as the output) . Answer Could you try something like this;
qt run shell commands via qprocess
I am developing a small QT application to interact with the terminal, to send commands to the terminal and to read back information printed out. Example: get output of all processes using ps -aux PROBLEM I am able to write information out to the terminal but I dont think it is in the system scope, actual example: Command passed to
Converting date format in bash
I have similar different file of the format backup_2016-26-10_16-30-00 is it possible to rename using bash script to backup_26-10-2016_16:30:00 for all files. Kindly suggest some method to fix this. Original file: backup_2016-30-10_12-00-00 Expected output: backup_30-10-2016_12:00:00 Answer To perform only the name transformation, you can use awk: As fedorqui points out in a comment, awk’s printf function may be tidier in
Move all files at one level up one level
I had a problem with a backup on a linux server that somehow moved all folders of files down one level into a new folder with the same name. I would like to return all files to their original location. Many of the files have spaces in their names to complicate things. Original directory structure: Incorrect directory structure: Note that
Word count after zgrep
I’m a little confused as to what this counts: Does it count the occurences of abcd in the 4 lines xyz? “wc -l” returns a different count than the number of lines present inside the file. Answer Prints every ‘xyz’ and 4 lines before from the file. zgrep -B 4 “xyz” <filename> Prints only lines, containing (case-insensitive) ‘abcd’. grep -i
cURL empty request data if https connection
I try to send the file via POST. Before that i used http connection and everything worked. But now var_dump($_REQUEST); in my php-file returns an empty array. This my curl log: $ curl -X POST -F “id=1” -F “file=@/tmp/file.txt” https://MY_DOMAIN/save_file.php -v Hostname was NOT found in DNS cache Trying MY_IP… Connected to MY_DOMAIN (MY_IP) port 443 (#0) successfully set certificate
Isn’t it possible for a file to not be visible for other processes?
I have a Java application which is invoked from a shell script and creates a file, then writes some content to it. It works something like this: The resulting file will be quite large (up to 100MB). The issue is that opening the FileOutputStream creates an empty file and makes it available to other processes in the system. In my
Linux – Do a command repeatedly for a certain length of time
I know what the command watch -n does. I would like to do something like the following: Essentially I want to repeat a command every 5 seconds, then stop after 30 minutes has passed. I’m missing the stop 30 minutes part. What command should I use to achieve this? Thanks. Answer Use timeout:
Ifconfig and route command on Android
I wondering whether exist way to get result of ifconfig and route commands result programmatically in Android device? Can I do this in non rooted device? Answer In your AndroidManifest.xml file Your code: Output You can’t reach to know whether you are connected via wifi or network using WifiManager as WifiManager only deals with wifi. You have to use ConnectivityManager.