3/31/2023 0 Comments Ssh shell script![]() This has the effect of printing the client's hostname instead of the server's.īy quoting the here token ('EOL' or "EOL"), local expansion will not take place, so the server sees echo "Logged in on $HOSTNAME and the current date is $(date)" which is expanded and printed with the server's hostname and date, which is usually the intention here. This means that before sending the commands to the server, the client replaces $HOSTNAME with localhost, thereby sending echo "Logged in on localhost" to the server including $(date). When the end token of a here document is unquoted, parameter expansion and command substitution will happen on in contents of the here doc. You need to quote ‘EOL’ to make here document expansions happen on the server side rather than on the client.Įcho "Logged in on $HOSTNAME and the current date is $(date)" Please support the nixCraft with a PayPal donation or Patreon. Keeping the site online is challenging, with everyone blocking Ads □. nixCraft is a one-person show, and many of you use Adblocker. □ Was this helpful? Please add a comment to show your appreciation or feedback. Join the nixCraft community via RSS Feed or Email Newsletter. He wrote more than 7k+ posts and helped numerous readers to master IT topics. Vivek Gite is the founder of nixCraft, the oldest running blog about Linux and open source. ![]() ![]() See ssh documentation online or read it locally (offline) by typing the man command as follows: Multiple -t options force tty allocation, even if ssh has no local tty. For instance, when implementing menu services. On the other hand, we can force pseudo-terminal allocation bypassing the -t option to ssh to execute arbitrary screen-based programs on a remote machine, which can be very useful. Please note that when you pass the -T to ssh when you wish to disable pseudo-terminal allocation. Multi-line command using Heredoc when you need to assign variables Use Heredoc bash feature to run many commands Multi-line command executing using Heredoc feature of bash Summing up Various ways to execute commands remotely using SSH Purpose
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |