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Mar
13
revised Security implications of forgetting to quote a variable in bash/POSIX shells
added 48 characters in body
Mar
12
comment list graphical processes from terminal
See Who's got the other end of this unix socketpair?
Mar
12
comment list graphical processes from terminal
lsof can list unix or abstract domain sockets, but can't tell what they connect to.
Mar
12
comment What are the commands which will work in unix but won't work in linux
See the Unix specification for a list of standard basic utilities available in most Unix-like systems.
Mar
12
comment What are the commands which will work in unix but won't work in linux
ksh88 in what OS? Unix is not an OS nowadays, it's a family. Unix OSes include Apple OS/X, AIX, Solaris, HPUX, Tru64... If you want a shell available on RHEL that is compatible with ksh88, ksh93 is probably your best bet though pdksh/mksh may be enough. As for the commands used that obviously depends on which ones?
Mar
12
comment What are the commands which will work in unix but won't work in linux
Your question doesn't make sense. Linux is the kernel found in a wide variety of Unix-like (Debian, RHEL, OpenSuse...), and not-so-Unix-like (Android, ChromeOS, smart TVs...) systems. Unix denotes a wide family of operating systems which in some acceptances of the term includes those Linux-based systems like Debian/RHEL... All different Unix and Unix-like systems (thousands of different ones) have different commands, all of them have optional commands. Which kernel they use is of limited relevance.
Mar
12
answered How to [constantly] read the last line of a file?
Mar
11
revised Showing all pages at once with man command
sorry, tru64 doesn't derive from ultrix strictly speaking.
Mar
11
comment Showing all pages at once with man command
Yes, I don't think it's portable outside Linux (the two commonly found man implementations there derive from a common one that supports it) and FreeBSD and their derivatives (even other BSDs like NetBSD/OpenBSD don't support it).
Mar
11
revised Showing all pages at once with man command
Ultrix not really relevant these days.
Mar
11
comment Grep not writing output until end of input
It's a FAQ here
Mar
11
answered How do I update the dates (by 30 days) in the files going to that specific location in unix?
Mar
11
comment Matching two files for similar first line
Sorry, join <(sort -bk1,1 file1) <(sort -bk1,1 file2)
Mar
11
revised Matching two files for similar first line
added 16 characters in body
Mar
11
answered Output to be saved in file named same as the input file
Mar
11
comment Output to be saved in file named same as the input file
Except with zsh, that won't work with binary files (files containing NUL bytes). Like sponge, that stores the whole file in memory (and in a temp files with most shells).
Mar
11
revised Output to be saved in file named same as the input file
order matters
Mar
11
revised Output to be saved in file named same as the input file
added 119 characters in body
Mar
11
revised echo \\* - bash backslash escape behavior, is it evaluated backwards?
edited body; edited body
Mar
10
comment Showing all pages at once with man command
Not all man implementations have a -P. Or it may mean something else (like specifying a manpath on Ultrix).