ssh automatically compresses what is being transmitted. My man pages says this is good if you are using modem lines, but if you have a fast connection, it is slower to compress the file than to just go on and transmit it.
Another place where you would want to use the -C to turn of compression is even on a modem, if the file is already compressed, compressing it again would only get marginal shrinkage, but burn a whole lot of cpu cycles for nothing.
But I dont use this option " -C " for compressing. I use this to execute the command on remote machine.
for exp : if I want to run a command called " ls " on a remote machine called "system1" . I can use the following command:
ssh -C system1 ls
This command will list out the contents of the directory on the remote machine " system1"
But my doubt is how come compression comes into picture?
Since you have the option to use SSH 2 protocol it's preferable to use it, rather than insecure rsh command. Your command for listing the remote folder is OK, I use this kind of "automation" every day. The thing with -C flag is that compress all the data that the client sends or receives - so, you invoke a command, there is a data sent to the server, and this data is being compressed on the fly. Since SSH is encrypted by default, it doesn't make sense to use this option at all, plus you have fast network.
One yeah ago I have done performance benchmark against OpenSSH - when using -C flag you actually loose performance, so just don't use it
Hi,
I am trying to complete my bash script in order to find which SSH servers on LAN are still active with the ssh keys, but i am frozen at this step:
#!/bin/bash
# LAN SSH KEYS DISCOVERY SCRIPT
</etc/passwd \
grep /bin/bash |
cut -d: -f6 |
sudo xargs -i -- sh -c '
&& cat... (11 Replies)
Hi,
I want to validate ssh connection one after one for multiple servers..... password less keys already setup but now i want to validate if ssh is working fine or not...
I have .sh script like below and i have servers.txt contains all the list of servers
#/bin/bash
for host in $(cat... (3 Replies)
I'm trying to setup a link between my home pc (work-machine) and a server at work (tar-machine) that is behind a gateway (hop-machine) and not directly accessible.
my actions:
work-machine$ ssh -L 1234:tar-machine:22 hop-machine
work-machine$ ssh -p 1234 user@127.0.0.1
- shh access on... (1 Reply)
I have write a script which contains
ssh -p 12345 dcplatform@10.125.42.50
ssh 127.0.0.1 -p 5555 "$CMD"
ssh root@$GUEST_IP "$CMD"
before I use public key, it works well, now I want to change to "expect", BUT I don't want to change above code and "parameter position"
I can post a... (1 Reply)
Hi,
I want to use ssh to add a register key on remote ssh server. Since there are space characters in my register key string, it always failed. If there is no space characters in the string, it worked fine. The following is what I have tried. It seems that "ssh" command doesn't care about double... (9 Replies)
I am using Net::SSH::Expect to connect to the device(iLO) with SSH. After the $ssh->login() I'm able to view the prompt, but not able to send any coommands.
With the putty I can connect to the device and execute the commands without any issues.
Here is the sample script
my $ssh =... (0 Replies)
09-20-2007
ssh -C