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Oct 27, 2021 · In shell, when you see. $ command one && command two. the intent is to execute the command that follows the && only if the first command is successful. This is idiomatic of Posix shells, and not only found in Bash. It intends to prevent the running of the second process if the first fails.
Aug 27, 2014 · The POSIX specification for find says: -mtimen The primary shall evaluate as true if the file modification time subtracted from the initialization time, divided by 86400 (with any remainder discarded), is n. Interestingly, the description of find does not further specify 'initialization time'. It is probably, though, the time when find is ...
May 5, 2011 · Try with the fd command if installed. Install instructions. Find all files that start with 'name': fd "name*" This command ignores all .hidden and .gitignoreed files. To include .gitignoreed files, add the -I option as below: fd -I "name*" To include hidden files, add the -H option as below: fd -H "name*"
Dec 13, 2011 · 157. As some of the other answers have stated, you probably use an alias somewhere which maps cp to cp -i or something similar. You can run a command without any aliases by preceding it with a backslash. In your case, try. \cp -r /zzz/zzz/* /xxx/xxx. The backslash will temporarily disable any aliases you have called cp.
At first, 2>1 may look like a good way to redirect stderr to stdout. However, it will actually be interpreted as "redirect stderr to a file named 1 ". & indicates that what follows and precedes is a file descriptor, and not a filename. Thus, we use 2>&1. Consider >& to be a redirect merger operator.
Jul 9, 2012 · 38. Given you want to search for the string search and replace it with replace across multiple files, this is my battle-tested, one-line formula: grep -RiIl 'search' | xargs sed -i 's/search/replace/g'. Quick grep explanation: -R - recursive search. -i - case-insensitive.
Jun 3, 2012 · What did this command do, and how I can cancel that? I restarted the computer, and it seems that it is still running. I looked in .bashrc and .profile , but I did not find it inside.
sh is a subprocess interface which lets you call programs as if they were functions. This is useful if you want to run a command multiple times. sh.ls("-l") # Run command normally. ls_cmd = sh.Command("ls") # Save command as a variable. ls_cmd() # Run command as if it were a function.
Dec 25, 2012 · 8. The little cedilla ~ indicates you are already in your /home/sharon directory. When you ask for 'cd Home' the terminal looks for /home/sharon/Home. There is none. Now you are asking, given the leading slash, to go to a directory above the current location; that is /home/Home. There is none.
Nov 27, 2013 · 4. Most important difference is that > makes shell open a file or file-like object with O_WRONLY|O_CREAT|O_TRUNC flags - the file will be created or truncated if it exists, while >> opens file with O_WRONLY|O_CREAT|O_APPEND flags - file will be created or appended to if it exists. This is evident if you trace system calls, for example with.
