Linked Questions

What is the difference between the printf function in bash and the echo function? Specifically, running: echo "blah" >/dev/udp/localhost/8125 did not send the "blah" command to the server ...

Following is the command which is in shell script. var="$(sshpass -p 'password' ssh -o "StrictHostKeyChecking=no" username@hostip <<-EOF command to run on remote host EOF )" when i echo $var, ...

I would like to store an HTTP request in a variable and then use it with OpenSSL I now have HTTP_REQUEST="HEAD / HTTP/1.1\\nHost: ${HOST_HEADER}\\nUser-Agent: check_ssl_cert/${VERSION}\\nConnection: ...

I have seen -- used in the compgen command. For example: compgen -W "foo bar baz" -- b What is the meaning of the -- in there?

I was wondering how to count the number of a specific character in each line by some text processing utilities? For example, to count " in each line of the following text "hello!" Thank you! The ...

I know that I could delete the last three chars with: echo -ne '\b\b\b' But how can I delete a full line? I mean I don't want to use: echo -ne '\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\...

ls -1 lists my elements like so: foo.png bar.png foobar.png ... I want it listed without the .png like so: foo bar foobar ... (the dir only contains .png files) Can somebody tell me how to use ...

I need to concatenate two variables to create a filename that has an underscore. Lets call my variables $FILENAME and $EXTENSION where filename is read from a file. FILENAME=Hello EXTENSION=WORLD.txt ...

Why does the following command not insert new lines in the generated file and what's the solution? $ echo "Line 1\r\nLine2" >> readme.txt $ cat readme.txt Line 1\r\nLine2

Is there an issue with sed and new line character? I have a file test.txt with the following contents aaaaa bbbbb ccccc ddddd The following does not work: sed -r -i 's/\n/,/g' test.txt ...

I'm trying to find the most efficient way to iterate through certain values that are a consistent number of values away from each other in a space separated list of words(I don't want to use an array)....

I have a file named my_file.txt whose content is just the string Hello. How could I redirect its content to the command echo? I know I have the commands less, cat, more... but I need to do it with ...

I am trying to list every .tar.gz file, only using the following command: ls *.tar.gz -l ...It shows me the following list: -rw-rw-r-- 1 osm osm 949 Nov 27 16:17 file1.tar.gz -rw-rw-r-- 1 osm osm ...

Recently I'm echoing short sentences to a tree_hole file. I was using echo 'something' >> tree_hole to do this job. But I was always worried of what if I mis-input of > instead of >>, ...

I want to remove a line from a file which contains a particular character only once, if it is present more than once or is not present then keep the line in file. For example: DTHGTY FGTHDC HYTRHD ...