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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:
Bash: redirect `cat` to file without newline - Stack Overflow cat file1 | tr -d '\n' but that discards all the newlines in the file, also not desirable So, to repeat my question: How do I cat file1 into the new file and add user input without adding the newline between them? (cat is not a requirement, but I am not familiar with printf, so if that's the solution then please elaborate on its use)
how to display spaces and tabs using unix and the cat command I know how to display the files with tabs (aka cat -T filename) but I've been trying to figure out how to show the spaces as well cat -A filename doesn't work for me, and only replaces tabs with ^I and places $ at the end of the line How can I utilize cat to print out a file with all tabs and spaces clearly marked?
Comparison of cat pipe awk operation to awk command on a file cat fname | slows things down a little as it has to copy the file from the disk to the kernel then to cat's buffer, then to a pipe, which goes to the kernel again, and then to another process It's not by a lot, as it should only be a linear slow-down and in-memory copying is quite fast, but you can always (=without depending on some_command s accepting file arguments) speed things up by replacing
Read contents of large files without using cat command in linux I'm trying a more efficient way of reading file contents in Linux without using the "cat" command, especially for larger file contents, as in such cases cat just shoots up the memory and CPU on the server