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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 )
LINUX Shell commands cat and grep - Stack Overflow cat countryInfo txt reads the file countryInfo txt and streams its content to standard output | connects the output of the left command with the input of the right command (so the right command can read what the left command prints) grep -v "^#" returns all lines that do not (-v) match the regex ^# (which means: line starts with #)
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
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"
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
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 obtain the number of CPUs cores in Linux from the command line? $ cat proc cpuinfo | awk ' ^processor {print $3}' | tail -n 1 NOTE: Since proc cpuinfo holds a number of entries corresponding to the cpus count, a processor field initial value is 0, don't forget to increment the value of the last cpu core by 1
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