Dear expert,
what is this command touch -c filename using for?
I find if execute and filename is existed, it update the date to now.
If the filename is not exeisted, it don't create the file..
so what is this command using for?
Thank a lot! (1 Reply)
hello everyone i am new to this forum and was wondering if you all could help me out.... i am looking for a touch command that can touch directories as well as files that does not involve sygwin... any and all help would be appreiciated :D (3 Replies)
If touch command sets the modification and access times of files to the current time of day, is there a command that could do the reverse of this? Say change the access times of files to an earlier time or date?
Say I have this file:
HOME> ls -l
-rw-rw-r-- 1 orbix orbix 886 May... (1 Reply)
Hi,
This might be the stupidest question ever but here it goes, i need to create a file with the name Hello! It's $s It using the touch command
but whenever i use
touch 'Hello! It's $s'
i get s is undefined
touch Hello! It's $s
i get ' unmatched
Please help ^_^ (6 Replies)
Can any one provide answer for the below 3 requirements,
1.
file.txt
grep "name" file.txt > file1.txt
rm -f file.txt
mv file1.txt file.txt
as per abov,
a pattern grepped in file.txt and the content moved to again file.txt
My need is i want the timestamp of file.txt before chaning and... (3 Replies)
Is there a way to do...
touch ./config/newdir/newfile
if neither newdir and newfile exists?
man touch tells me there's not (?)
Is out there another tool to do that?
Thx in advance! :b: (6 Replies)
Hi,
I have a touch command in my script which creates / updates a file TODAY. Then i try to find the list of files which are newer than this TODAY file.
touch `date '+%m%d'`0000 TODAY
cd /auto/users-35/p494856/learning/filetransfer/
find . -name "*csv" -newer... (3 Replies)
Hi all
I changed some of my files in my hoem directory to old dates using the touch command like this
touch -t 200805101024 file name
but after using this command the date changed properly but it displays like below
-rwxr--r-- 1 fincntrg fingrp 193619 May 10 2008 vi.pdf
I... (3 Replies)
hi ,
I am transferring files from one unix server to another, after transfer of a file i want to touch the same file name in another directory in the destination server.
How can i touch a file when i am in ftp prompt on the source server.
Thanks in advance (2 Replies)
Discussion started by: nick1982
2 Replies
LEARN ABOUT CENTOS
foreach
foreach(n) Tcl Built-In Commands foreach(n)
__________________________________________________________________________________________________________________________________________________NAME
foreach - Iterate over all elements in one or more lists
SYNOPSIS
foreach varname list body
foreach varlist1 list1 ?varlist2 list2 ...? body
_________________________________________________________________DESCRIPTION
The foreach command implements a loop where the loop variable(s) take on values from one or more lists. In the simplest case there is one
loop variable, varname, and one list, list, that is a list of values to assign to varname. The body argument is a Tcl script. For each
element of list (in order from first to last), foreach assigns the contents of the element to varname as if the lindex command had been
used to extract the element, then calls the Tcl interpreter to execute body.
In the general case there can be more than one value list (e.g., list1 and list2), and each value list can be associated with a list of
loop variables (e.g., varlist1 and varlist2). During each iteration of the loop the variables of each varlist are assigned consecutive
values from the corresponding list. Values in each list are used in order from first to last, and each value is used exactly once. The
total number of loop iterations is large enough to use up all the values from all the value lists. If a value list does not contain enough
elements for each of its loop variables in each iteration, empty values are used for the missing elements.
The break and continue statements may be invoked inside body, with the same effect as in the for command. Foreach returns an empty string.
EXAMPLES
This loop prints every value in a list together with the square and cube of the value:
set values {1 3 5 7 2 4 6 8} ;# Odd numbers first, for fun!
puts "Value Square Cube" ;# Neat-looking header
foreach x $values { ;# Now loop and print...
puts " $x [expr {$x**2}] [expr {$x**3}]"
}
The following loop uses i and j as loop variables to iterate over pairs of elements of a single list.
set x {}
foreach {i j} {a b c d e f} {
lappend x $j $i
}
# The value of x is "b a d c f e"
# There are 3 iterations of the loop.
The next loop uses i and j to iterate over two lists in parallel.
set x {}
foreach i {a b c} j {d e f g} {
lappend x $i $j
}
# The value of x is "a d b e c f {} g"
# There are 4 iterations of the loop.
The two forms are combined in the following example.
set x {}
foreach i {a b c} {j k} {d e f g} {
lappend x $i $j $k
}
# The value of x is "a d e b f g c {} {}"
# There are 3 iterations of the loop.
SEE ALSO
for(n), while(n), break(n), continue(n)
KEYWORDS
foreach, iteration, list, looping
Tcl foreach(n)