What is the meaning of $$ in KornShell? I guess it is associated with the process ID, but I want to know its exact meaning.
$$ is the process id of the ksh process itself; $PPID is the process id of its parent.
Here s the ksh (93) documentation for special parameters (it s after the fold). Same info for ksh88.
It is used for making temporary names with the process id. Say you need a file name but that name needs to be unique to the process you are in - so if more than one person runs the same ksh script they will not step on each other.
$$ is in bash, sh and other UN*X shells.
I need to create a simple fixed width text file in KornShell (ksh). My current attempt using printf to pad the string isn t working out very well. What s the shortest, cleanest way to create a fixed ...
how to use the find command to find files/directories which are not matching the pattern. for eg: find <some options > -name "dontfile.txt" should give me output of all the find whose file ...
I need to put the contents of all *.as files in some specified folder into one big file. How can I do it in Linux shell?
How can I check the file encoding in a shell script? I need to know if a file is encoded in utf-8 or iso-8859-1. Thanks
The == operator is used to compare two strings in shell script. However, I want to compare two strings ignoring case, how can it be done? Is there any standard command for this?
I like to write bash shell scripts on my iPhone, put them in an app folder with an icon, plist, etc., so they execute like apps by tapping their icon on SpringBoard. This is not interactive like ...
Whenever I start a shell in vim using :sh, it doesn t source my ~/.bashrc file. How can I get it to do this automatically?
在Windows XP中,没有一时出现指挥时,是否有办法操作一种灰色文字? 我常常需要把“善待”(工作)与“灰色”同起来,即使我的文字没有产出,......
