you can use the head command to limit the output of grep to the first 5 results before passing it to xargs. Here’s the modified command: grep -r -l ‘foo’ | head -n 5 | xargs sed -i ‘s/foo/bar/g’ For items 5 to 10, you can use a combination of head and tail commands to … Read more
In Qt you can add this line to your .pro file to force the compiler to look there for header files. Change it to the folder where your header files are stored. INCLUDEPATH += <your path> 1 solved I am really confused with this kind of compilation error( C ffmpeg Qt)
please do the following. On terminal check the present directory by ‘pwd’ command and then check the directory in which your programme is there and see if they are same or not. And while writing gcc yourfile it’s case sensitive. Hope this helps 1 solved GCC compiler errors with “No such file or directory”
Maybe a good idea. It’s harder to recognize, for someone which is looking to your keyboard, while you typing in your password. I’ve tried it under Debian and it was no problem. For example we want a user with the password End Of Text or in other words CTRL + C. I did this with … Read more
To reduce the amount of space you use significantly, you’ll need to reduce the number of copies you keep. This is the 2nd argument to the script. So if you run every 3 days, and want to keep a month of backups, change it to: ../rsyncsnapshot.sh daily 10 0 solved Ubuntu Cronjob with rsync
In the function argument: char arr[9][5] In the loop: for (i = 0; i<5; i++) { for (j = 0; j<9;j++) { if (arr[i][j] == 1) You flipped the position of i and j. i should go from 0 to 9, j from 0 to 5. 0 solved garbage value in C array
what can be improved on a given random function to make it more random or for a bigger range or something else? and therefore no SRANDOM can be used up to now. How to improve the randomness of the fuction above, if possible ? Sooo write your own SRANDOM with your own semantics. Ex: srandom() … Read more
Dump the database in windows Copy the files to linux Restore the database See https://docs.mongodb.com/database-tools/mongodump/ solved I want to move whole mongo databse to linux [closed]
There are a great deal of possibilities that you can look at. One that I have had one of the greatest experiences with is the Simple Directmedia Layer. It doesn’t come with a drag-and-drop graphics designer like Visual Studio (Is that what you mean by ‘UI designer’?). However its api is fairly powerful and as … Read more
The line: a[i] = strtok(s,” “); sets a[i] to a pointer within the string, which you’re modifying and which may eventually have the temporary NUL characters (from strtok) removed. You may want to try: a[i] = strdup (strtok (s,” “)); instead. Let me explain further. Say we have the command (as it exists in memory): … Read more
Given that 98% of the time is spent in that function, I rewrote your “get a number” function: int Ten_To_One_Million_Ten(void) { unsigned Number = (((unsigned)rand() << 5) + (unsigned)rand()%32) % 1000000 + 10; assert(Number >= 10 && Number <= 1000010); return Number; } Now, on my machine, using clang++ (Version 3.7 from about 4 weeks … Read more
If your date formats are static, you have two easy options. Option 1 Strip out the day, month, and year from each date. Compare the two years. If the years are the same, compare the two months. If the months are the same, compare the two days. Option 2 Strip out the day, month, and … Read more
It sounds like you are trying to rewrite ls | more. Do you really need to do this? The program below opens the file temp.txt for writing. It then usesqx (the equivalent of backticks) to get the output from a command and write it to the file. The same file is then reopened for reading, … Read more
I was able to solve the issue, Issue is their was no such device like /dev/sdb3,It may be due to hypervisor type. So i was trying mount command in BusyBox and i found it their as /dev/vdb3. solved make linux machine grub bootable using bootable disk [closed]
Decimal and octal are number bases, this only matters when presenting a number (or when inputing a number); the actual number is generally stored in binary in the computer’s memory but this doesn’t often matter to typical programs. In your case, conversion to octal generally involves extracting three bits at a time (since 23 is … Read more