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Run the program in a new session
Additional information
setsidThe command child process inherits from the parent process: SessionID, process group ID and open terminal. If the child process wants to get rid of these, it can be achieved by calling in the code setsid. This can be achieved by using the command line or script setsidto run the program. setsidHelps a process detach itself from open terminals, process groups, and sessions inherited from the parent process.
grammar
setsid [options] <program> [arguments ...]
Options
-c,--ctty: Set the control terminal as the current control terminal-f,--fork: always fork-w,--wait: Wait for the program to exit and return with the same
Example
It can be seen setsidthat the use of is also very convenient, and you only need to add before the command to be processed setsid.
[root@root ~]# setsid ping www.ibm.com
[root@root ~]# ps -ef |grep www.ibm.com
root 31094 1 0 07:28 ? 00:00:00 ping www.ibm.com
root 31102 29217 0 07:29 pts/4 00:00:00 grep www.ibm.com
[root@root ~]#
squid
squid server daemon
Additional information
squidCommands the server daemon of the high-performance web client proxy caching server suite "Squid".
grammar
squid [选项]
Options
-d: Send information at the specified debug level to the standard error device-f: Use the specified configuration file. instead of using the default profile-k:Send instructions to squid server-s: Enable syslog logs-z:Create cache directory-C:Do not catch fatal signals-D:Does not perform DNS parameter testing-N:Run in non-daemon mode-X: Force into full debug mode
squidclient
Client management tool for squid server
Additional information
squidclientThe command uses the client management tool of the squid server, which can view the detailed running information of the squid server and manage the squid server.
grammar
squidclient [选项] [参数]
Options
-a:Does not contain "accept:header"-r: Force cache to reload URL-s: Quiet mode, does not output information to the standard output device-h: Get the URL from the specified host-l:Specify a local IP address for binding-p:Port number, default is 3128-m:Specify the method to send the request-u:Proxy authentication username
parameter
- URL: Specifies the URL in the operation cache
ssh-copy-id
Install the local ssh public key file to the account corresponding to the remote host
Additional information
ssh-copy-idThe command can copy the public key of the local host to the authorized_keys file of the remote host. ssh-copy-idThe command will also set appropriate permissions for the remote host's user home directory (home) and ~/.ssh and ~/.ssh/authorized_keys.
grammar
ssh-copy-id [-i [identity_file]] [user@]machine
Options
-i: Specify the public key file
Example
1. Install the local ssh public key file to the account corresponding to the remote host:
ssh-copy-id user@server
ssh-copy-id -i ~/.ssh/id_rsa.pub user@server
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