linux - How does cat lt; lt; EOF work in bash? - Stack Overflow The cat <<EOF syntax is very useful when working with multi-line text in Bash, eg when assigning multi-line string to a shell variable, file or a pipe Examples of cat <<EOF syntax usage in Bash: 1 Assign multi-line string to a shell variable $ sql=$(cat <<EOF SELECT foo, bar FROM db WHERE foo='baz' EOF )
Is there replacement for cat on Windows - Stack Overflow Windows type command works similarly to UNIX cat Example 1: type file1 file2 > file3 is equivalent of: cat file1 file2 > file3 Example 2: type * vcf > all_in_one vcf This command will merge all the vcards into one
How to append output to the end of a text file - Stack Overflow printf "hello world" >> read txt cat read txt hello world However if you were to replace printf with echo in this example, echo would treat \n as a string, thus ignoring the intent printf "hello\nworld" >> read txt cat read txt hello world
git - How do I access my SSH public key? - Stack Overflow On terminal cat ~ ssh id_rsa pub explanation cat is a standard Unix utility that reads files and prints output ~ Is your Home User path ssh - your hidden directory contains all your ssh certificates
How does an SSL certificate chain bundle work? - Stack Overflow Unix: cat cert2 pem cert1 pem root pem > cert2-chain pem Windows: copy A cert1 pem+cert1 pem+root pem cert2-chain pem A 2 2 Run this command openssl verify -CAfile cert2-chain pem cert3 pem 2 3 If this is OK, proceed to the next one (cert4 pem in this case) Thus for the first round through the commands would be
How can I write a heredoc to a file in Bash script? cat << until_it_ends | sudo tee path to your file This line will write to the file ${THIS} will also write to the file, with the variable contents substituted until_it_ends To append an existing file (or write to a new file) owned by user=foo, with the literal contents of the heredoc: