WebBut I cannot direct the output to a file. # ( ( partclone.restore -X -s some.img -o /dev/sda3 2>&3 ) 3>&1 ) grep Completed >> ./log 2>&1 There is nothing in the log file. But something like cat some.file grep some.string >> ./log works fine. Why? bash grep redirect Share Improve this question Follow edited Jul 11, 2014 at 18:37 kraxor WebApr 21, 2024 · There are multiple ways to redirect output from shell scripts and commands. 1. Redirect STDOUT For the following examples, I will use this simple set of files: $ls -la file* -rw-r--r--. 1 admin2 admin2 7 Mar 27 15:34 file1.txt -rw-r--r--. 1 admin2 admin2 10 Mar 27 15:34 file2.txt -rw-r--r--. 1 admin2 admin2 13 Mar 27 15:34 file3.txt
How to get grep exit code but print all lines?
WebSep 21, 2024 · Using tee command, we can easily redirect the output of one command to another command. Here output of first command will act as input for second command. Example is shown below: $ grep 'root' /etc/passwd tee /tmp/passwd.tmp wc -l 2 $ cat /tmp/passwd.tmp root:x:0:0:root:/root:/bin/bash operator:x:11:0:operator:/root:/sbin/nologin $ WebWrite to and append a file using output redirection Use the pipe ( ) character to chain together commands Searching files with grep command We went over how to search within a file using less. We can also search within files without even opening them, using grep. sanctuary newcastle
The Shell: Searching and Redirection
WebAug 27, 2024 · In the manual page, it states that the -o option can be used to output it to a file instead of stderr. You can type man [insert command here] for the vast majority of programs, and have all the documentation you will need to effectively use them. Share Improve this answer edited Aug 27, 2024 at 18:18 answered Aug 27, 2024 at 18:02 john … WebRedirection is done using either the ">"(greater-than symbol), or using the " "(pipe) operator which sends the standard output of one command to another command as standard input. As we saw before, the catcommand concatenates files and puts them all together to the standard output. WebFind all files with extension .py, grep only rows that contain something and save the rows in output.txt. If the output.txt file exists, it will be truncated, otherwise it will be created. Using -exec: find . -name '*.py' -exec grep 'something' {} \; > output.txt . I'm incorporating Chris Downs comment here: The above command will result in ... sanctuary netflix