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 )
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
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
Encode to Base64 a specific file by Windows Command Line cat <file_name>| base64 to obtain the file's contents encoded as base64 On Windows I'm not able to have the same result I have found this solution: certutil -encode -f <file_name> tmp b64 findstr v c:- tmp b64 del tmp b64 But this needs the system to generate a temporary file and so, at the end, go to destroy it
linux - How can I copy the output of a command directly into my . . . cat file | xclip Paste the text you just copied into a X application: xclip -o To paste somewhere else other than an X application, such as a text area of a web page in a browser window, use: cat file | xclip -selection clipboard Consider creating an alias: alias "c=xclip" alias "v=xclip -o"
How to concatenate string variables in Bash - Stack Overflow Variables and arrays (indexed or associative*) in Bash are always strings by default, but you can use flags to the declare builtin, to give them attributes like "integer" (-i) or "reference"** (-n), which change the way they behave
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
How to get . pem file from . key and . crt files? - Stack Overflow cat otherfilegodaddygivesyou crt gd_bundle-g2-g1 crt > name crt Then I used these instructions from Trouble with Google Apps Custom Domain SSL , which were: openssl rsa -in privateKey key -text > private pem openssl x509 -inform PEM -in www_mydomain_com crt > public pem
Looping through the content of a file in Bash - Stack Overflow $ cat tmp test txt Line 1 Line 2 has leading space Line 3 followed by blank line Line 5 (follows a blank line) and has trailing space Line 6 has no ending CR There are four elements that will alter the meaning of the file output read by many Bash solutions: