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CS(1) General Commands Manual CS(1) NAME cs -- concurrent ssh client SYNOPSIS cs [-emqrstuVv1] [-c file] [-cmd] [-cname] [-d file] [-dd] [-du path] [-f script.sh] [-h hosts_file] [-hba] [-i identity_file] [-io] [-ip] [-l login_name] [-lip] [-mx] [-nc] [-nmap] [-ns] [-o output_file] [-P port] [-p path] [-ping] [-soa] [-to timeout] [-top] [-tr] [-tri] [-uname] [-vm] [command] [[user@]host] ... DESCRIPTION cs is a program for concurrently executing local or remote commands on multiple hosts. It is using OpenSSH for running remote commands. Its main purpose is to help automate and manage large network of hosts. The options are as follows: -c file Copy file to the remote machine. -cmd Run an arbitrary local command concurrently on multiple hosts. -cname Run a local DNS query of type CNAME. -d file Download file from the remote machine. It will be saved in a directory named after the remote host only when you download from multiple servers. -dd Prints basic hardware information for a specific host (sudo(8) and dmidecode(8) required). -du path Prints the list of largest files in a specific directory (sudo(8) required, units in M). -e Prints hosts with errors only. -f script.sh Run a local shell script on the remote host. -h hosts_file Read hostnames from the given hosts_file. Lines in the hosts_file can include commented lines beginning with a `#' and only one host per line is allowed. -hba Lists installed HBAs and their WWPNs (Linux only). -i identity_file Selects a file from which the identity (private key) for public key authentication is read. The default is ~/.ssh/id_rsa. -io Run remote iostat(1) on a specific host. -ip Lists network interfaces. -l login_name Specifies the user to log in as on the remote machine. This also may be specified on a per-host basis on the command line. -lip Scans storage interconnects for new luns (Linux only). -m Lists mounted filesystems on a speficic host. -mx Run a local DNS query of type MX. -nc Tests a specific port with nc(1). Default is 22/tcp. -nmap Scans host with nmap(1). -ns Run a local DNS query of type NS. -o output_file Saves standard output and standard error to a file. -P port Port to connect to on the remote host. -p path Specifies remote or local path for files in a remote copy or download mode. -ping Sends ICMP ECHO_REQUEST to network hosts. -q Quiet mode. Supresses verbose standard output from remote ma- chines. This mode reports success or failure only. -r Recursively copy entire directories. It follows symbolic links encountered in the tree traversal. -s Sort output. -soa Run a local DNS query of type SOA. -t Force pseudo-tty allocation. -to timeout Specifies the timeout (in seconds) used when connecting to the SSH server. The default value is 4 seconds. -top Run remote top(1) in batch mode on a specific host. -tr Run local traceroute(8). -tri Run local traceroute(8) using ICMP (local sudo(8) required). -uname Prints remote system information including OS version. -u Run remote uptime(1) on a specific host. -V Displays the version number and exit. -v Verbose mode. Causes cs to print debugging messages from ssh(1) about its progress. This is helpful in debugging con- nection, authentication, and configuration problems. Multiple -v options increase the verbosity. The maximum is 3. -vm Run remote vmstat(8) on a specific host. -1 One line mode, useful for sorting output later. AUTHENTICATION The default method for authentication is a public key authentication which serves its purpose when dealing with multiple hosts. You can read more about public key authentication in ssh(1). EXIT STATUS The cs utility exits 0 on success, and >0 if an error occurs. EXAMPLES Run a series of commands on hosts foo and bar: $ cs 'uptime; uname -a' foo bar Run a command on multiple hosts specified in a hosts_file: $ cs -h hosts_file uptime Run a local shell script on multiple hosts: $ cs -f script.sh foo{1..100} Run a local shell script with sudo(8) on multiple hosts: $ cs -t -f script.sh foo{1..100} Copy file to multiple hosts using a specific remote path: $ cs -c file -h hosts_file -p /foo/bar Download file from host:~ foo to a current working directory: $ cs -d file foo Download recursively files from /foo/bar from multiple hosts to a spe- cific local path /tmp with subdirectories named after remote hosts: $ cs -r -d '/foo/bar/*' -h hosts_file -p /tmp Run a command on multiple hosts and sort the output: $ cs -1 -h hosts_file 'free -m | grep Swap' | sort -rnk4 | head Run local ping(1) on multiple hosts: $ cs -ping foo{1..100} Show name and size of all files matching the glob pattern: $ cs -du '/var/log/mes*' foo{1..100} SEE ALSO scp(1), ssh(1), ssh_config(5), sudo(8) AUTHORS Andy Kosela <akosela@andykosela.com> FreeBSD Ports 14.quarterly July 19, 2017 CS(1)
NAME | SYNOPSIS | DESCRIPTION | AUTHENTICATION | EXIT STATUS | EXAMPLES | SEE ALSO | AUTHORS
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