>> /dev/null redirects standard output (stdout) to /dev/null, which discards it. (The >> seems sort of superfluous, since >> means append while > means truncate and write, and either appending to or writing to /dev/null has the same net effect. I usually just use > for that reason.) 2>&1 redirects standard error (2) to standard … Read more
Use sshpass: sshpass -p “password” scp -r user@example.com:/some/remote/path /some/local/path or so the password does not show in the bash history sshpass -f “/path/to/passwordfile” scp -r user@example.com:/some/remote/path /some/local/path The above copies contents of path from the remote host to your local. Install : ubuntu/debian apt install sshpass centos/fedora yum install sshpass mac w/ macports port install … Read more
When the shell sees > index.html in the command line it opens the file index.html for writing, wiping off all its previous contents. To fix this you need to pass the -i option to sed to make the changes inline and create a backup of the original file before it does the changes in-place: sed … Read more
Take a look here. It should be: yourcommand &> filename It redirects both standard output and standard error to file filename.
That part is written to stderr, use 2> to redirect it. For example: foo > stdout.txt 2> stderr.txt or if you want in same file: foo > allout.txt 2>&1 Note: this works in (ba)sh, check your shell for proper syntax
Your command does not work because the redirection is performed by your shell which does not have the permission to write to /root/test.out. The redirection of the output is not performed by sudo. There are multiple solutions: Run a shell with sudo and give the command to it by using the -c option: sudo sh … Read more
cmd >>file.txt 2>&1 Bash executes the redirects from left to right as follows: >>file.txt: Open file.txt in append mode and redirect stdout there. 2>&1: Redirect stderr to “where stdout is currently going”. In this case, that is a file opened in append mode. In other words, the &1 reuses the file descriptor which stdout currently … Read more