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Thanks, man 2 read/write is working propely

How to use MAN to find information about read() and write() function ?

The command "man read" show some rubbish, for example "man open" show great information about function I need.

I need to write script in AWK, changing first char from a line from lower to upper.
I found function toupper etc. but have no idea how to sent only first char from every line instead of the whole...

Thank you all for Your help, I almost got everything expect one :

"setenv MACH `uname -s`"

Hello, can anyone explain me please what do those lines do ?

From file .login

1) set history=40
2) setenv MACH `uname -s`
3) source /etc/login
4) source ~/$MACH/.login

From file .cshrc
...

Hello , this is my first topic cause I need your little help:(

I got .txt file, and I want to find lines without letter 'a', so im writing:

grep "[^a]" list.txt (list.txt is the file of...