Linux Overlay and append __linux

The use of nohup is very convenient, just add nohup before the command to be processed, standard output and standard error lack the capital is redirected to Nohup.out file. In general, we can add "&" at the end to run the command in the background, or ">filename 2>&1" to change the default redirected file name.
Nohup Sample

[root@pvcent107 ~]# nohup ping www.ibm.com & [1] 3059 nohup:appending output to ' nohup.out ' [ root@pvcent107 ~]# ps-ef |grep 3059 root 3059 984 0 21:06 pts/3 00:00:00 Ping www.ibm.com root 3067 984 0 21:06 pts/3 00:00:00 grep 3059 [root@pvcent107 ~]#

When a file redirection is made,,> represents an overlay of,>> to indicate an append.

Cat a >> b append