I have been stuck on this for some time and invested many hours trying to find a solution. I am trying to either loop through two variables or or two arrays and not sure how to do it. I am limited to ksh only, and don't have the ability to do a foreach, or for i AND for j etc...I want to do a diff and compare version1 cmd directory to version2 cmd directory, and then iterate and compare version1 properties directory to version 2 properties directory. Can't find a similar thread. I will write a pseudo code below. I am open to other ideas.. Any help is appreciated.
Another question, is it possible to, in a for-loop incrementing until it reaches a certain number, to have it loop again without incrementing? Just have it drop what it is doing when it reaches this command and start again at the same number it was at? I know I could make a while loop and just... (0 Replies)
Hi All,
I amlearning UNIX scripting. I have a small query. I would be thankful if any one helps me out.
I have a below piece of code which delets the files. If file dosent have the permissions to delete a particular file I have used 2>>operator to track the error code.
But my objective is... (1 Reply)
I wonder how to stop further loop iterations when conditions gets false e.g.
This file.txt contains the following structure :
1
2
3
4
5
6
7
8
9
10
How to stop iteration when if statement gets false ?
for n in `cat file.txt`
do
if (( n<=5 )) (1 Reply)
question :how can i iterate to next item in for loop with the loop
e.g
for i in `cat abc.txt`
do
echo $i // this will display first line
i=$i+1; // this doesnt work for me.
echo $i; //this will display secound line
done
question: is my approach to manipulate text good?
I have... (3 Replies)
I have written the following script to update some Debian boxes.
#!/bin/bash
mxg_hosts_file="/etc/mxg/ssh-hosts"
while read line ; do
mxg_host="$(echo ${line} | awk -F":" '{print $1}')"
mxg_port="$(echo ${line} | awk -F":" '{print $2}')"
echo "Connecting and Upgrading... (3 Replies)
for VGLIST in `lsvg -o`
do
CLOSED_OUT=`echo $VGLIST | lsvg -l $VGLIST | awk '{print $6 " " $7}' | grep closed`
if ]; then
echo "Filesystems $CLOSED_OUT in VG that are in Closed status"
else
echo "\n Some message"
fi
Above Code is working fine, but echo "Filesystems $CLOSED_OUT... (8 Replies)
I have a script with logic like:
my_function()
{
if
mkdir $1
mkdir mydir_${2}
else
do something else
fi
}
read in list of items
while read list
do
my_function $list `date`
done
so basically it will make a directory for every name in the list and create a directory with the... (6 Replies)
bash in RHEL 6.4
I have a requirement in which I want to get the iteration count from a WHILE LOOP.
The below mentioned simple script test.sh works fine. In the below script, the WHILE loop will iterate every 5 seconds infinitely until it greps the string BASKETBALL from /tmp/somestring.txt... (6 Replies)
I am trying to check multiple server's "uptime" in a loop over "ssh".
When I execute multiple ssh commands with hard coded servernames script is executing fine.
But when I pass server names using while loop, script is exiting after checking first server's status, why?
# serverList... (8 Replies)
Hello,
I've written a script to automate encoding of all the MP4 files in a directory (incl. subdirectories). But unfortunately it's running for the first MP4 file only.
My machine details:
root@Ubuntu16:~# uname -a
Linux Ubuntu16 4.10.0-28-generic #32~16.04.2-Ubuntu SMP Thu Jul 20 10:19:48... (2 Replies)
Discussion started by: prvnrk
2 Replies
LEARN ABOUT REDHAT
package
package(n) Tcl Built-In Commands package(n)
__________________________________________________________________________________________________________________________________________________NAME
package - Facilities for package loading and version control
SYNOPSIS
package forget ?package package ...?
package ifneeded package version ?script?
package names
package present ?-exact? package ?version?
package provide package ?version?
package require ?-exact? package ?version?
package unknown ?command?
package vcompare version1 version2
package versions package
package vsatisfies version1 version2
_________________________________________________________________DESCRIPTION
This command keeps a simple database of the packages available for use by the current interpreter and how to load them into the inter-
preter. It supports multiple versions of each package and arranges for the correct version of a package to be loaded based on what is
needed by the application. This command also detects and reports version clashes. Typically, only the package require and package provide
commands are invoked in normal Tcl scripts; the other commands are used primarily by system scripts that maintain the package database.
The behavior of the package command is determined by its first argument. The following forms are permitted:
package forget ?package package ...?
Removes all information about each specified package from this interpreter, including information provided by both package ifneeded
and package provide.
package ifneeded package version ?script?
This command typically appears only in system configuration scripts to set up the package database. It indicates that a particular
version of a particular package is available if needed, and that the package can be added to the interpreter by executing script.
The script is saved in a database for use by subsequent package require commands; typically, script sets up auto-loading for the
commands in the package (or calls load and/or source directly), then invokes package provide to indicate that the package is
present. There may be information in the database for several different versions of a single package. If the database already con-
tains information for package and version, the new script replaces the existing one. If the script argument is omitted, the current
script for version version of package package is returned, or an empty string if no package ifneeded command has been invoked for
this package and version.
package names
Returns a list of the names of all packages in the interpreter for which a version has been provided (via package provide) or for
which a package ifneeded script is available. The order of elements in the list is arbitrary.
package present ?-exact? package ?version?
This command is equivalent to package require except that it does not try and load the package if it is not already loaded.
package provide package ?version?
This command is invoked to indicate that version version of package package is now present in the interpreter. It is typically
invoked once as part of an ifneeded script, and again by the package itself when it is finally loaded. An error occurs if a differ-
ent version of package has been provided by a previous package provide command. If the version argument is omitted, then the com-
mand returns the version number that is currently provided, or an empty string if no package provide command has been invoked for
package in this interpreter.
package require ?-exact? package ?version?
This command is typically invoked by Tcl code that wishes to use a particular version of a particular package. The arguments indi-
cate which package is wanted, and the command ensures that a suitable version of the package is loaded into the interpreter. If the
command succeeds, it returns the version number that is loaded; otherwise it generates an error. If both the -exact switch and the
version argument are specified then only the given version is acceptable. If -exact is omitted but version is specified, then ver-
sions later than version are also acceptable as long as they have the same major version number as version. If both -exact and ver-
sion are omitted then any version whatsoever is acceptable. If a version of package has already been provided (by invoking the
package provide command), then its version number must satisfy the criteria given by -exact and version and the command returns
immediately. Otherwise, the command searches the database of information provided by previous package ifneeded commands to see if
an acceptable version of the package is available. If so, the script for the highest acceptable version number is invoked; it must
do whatever is necessary to load the package, including calling package provide for the package. If the package ifneeded database
does not contain an acceptable version of the package and a package unknown command has been specified for the interpreter then that
command is invoked; when it completes, Tcl checks again to see if the package is now provided or if there is a package ifneeded
script for it. If all of these steps fail to provide an acceptable version of the package, then the command returns an error.
package unknown ?command?
This command supplies a ``last resort'' command to invoke during package require if no suitable version of a package can be found in
the package ifneeded database. If the command argument is supplied, it contains the first part of a command; when the command is
invoked during a package require command, Tcl appends two additional arguments giving the desired package name and version. For
example, if command is foo bar and later the command package require test 2.4 is invoked, then Tcl will execute the command foo bar
test 2.4 to load the package. If no version number is supplied to the package require command, then the version argument for the
invoked command will be an empty string. If the package unknown command is invoked without a command argument, then the current
package unknown script is returned, or an empty string if there is none. If command is specified as an empty string, then the cur-
rent package unknown script is removed, if there is one.
package vcompare version1 version2
Compares the two version numbers given by version1 and version2. Returns -1 if version1 is an earlier version than version2, 0 if
they are equal, and 1 if version1 is later than version2.
package versions package
Returns a list of all the version numbers of package for which information has been provided by package ifneeded commands.
package vsatisfies version1 version2
Returns 1 if scripts written for version2 will work unchanged with version1 (i.e. version1 is equal to or greater than version2 and
they both have the same major version number), 0 otherwise.
VERSION NUMBERS
Version numbers consist of one or more decimal numbers separated by dots, such as 2 or 1.162 or 3.1.13.1. The first number is called the
major version number. Larger numbers correspond to later versions of a package, with leftmost numbers having greater significance. For
example, version 2.1 is later than 1.3 and version 3.4.6 is later than 3.3.5. Missing fields are equivalent to zeroes: version 1.3 is the
same as version 1.3.0 and 1.3.0.0, so it is earlier than 1.3.1 or 1.3.0.2. A later version number is assumed to be upwards compatible with
an earlier version number as long as both versions have the same major version number. For example, Tcl scripts written for version 2.3 of
a package should work unchanged under versions 2.3.2, 2.4, and 2.5.1. Changes in the major version number signify incompatible changes: if
code is written to use version 2.1 of a package, it is not guaranteed to work unmodified with either version 1.7.3 or version 3.1.
PACKAGE INDICES
The recommended way to use packages in Tcl is to invoke package require and package provide commands in scripts, and use the procedure
pkg_mkIndex to create package index files. Once you've done this, packages will be loaded automatically in response to package require
commands. See the documentation for pkg_mkIndex for details.
SEE ALSO
msgcat(n), packagens(n), pkgMkIndex(n)
KEYWORDS
package, version
Tcl 7.5 package(n)
07-30-2016
