for cycle Post: 302288990

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1. Shell Programming and Scripting

shell cycle

Hello I got a cycle in the script which open another scripts. if then action fi Scripts action will be running 2 times at the same time. Inside of action() is insert into the table. But what I want is that only first script can do insert into table. So how to do...

2. Shell Programming and Scripting

For cycle

Hello, I have files in a dir. I what to create a FOR cycle that will do this FOR <condition> do file=`ls <directory> | tail -1` echo $file mv -f $file <another dir> done What I want to now is what should I put in the <condition>. The condition I want is that the FOR will execute...

3. Shell Programming and Scripting

wildcard in a if cycle

hello everybody, I need help on putting a wildcard match inside an if condition (I'm using korn shell): if ] then echo ' ' echo ''$MYSEL' is not a correct option' echo ' ' else ..... i tried also #if -ne "``" and a lot of combinations of `"' but I didn't find the...

4. Shell Programming and Scripting

for cycle question

i have a question how to modify below script to generate the expect result below : test.sh #!/bin/bash for ((i=0; i < 25; i++)) do echo $1$i done current result: test.sh 20090101 200901010 200901011 200901012 200901013 200901014 200901015 200901016 200901017 200901018

5. Shell Programming and Scripting

sed problem in a for cycle

Hi, i have a problem with a sed command runned in a for cycle... I have a file named fileX which contains (i have crippled the line to minimal for easy): load data dbfoo - TOCHANGE - comment load data dbboo - TOCHANGE - comment load data dbzoo - TOCHANGE - comment ... And a file...

6. Shell Programming and Scripting

Cycle for with for-then-else

Hi, i would like to insert a if-then-else function in to cycle for -------------- cat test -------------- # cat test ALFA BETA GAMMA ----------------------- This is my script: #!/bin/bash for i in $(cat test); if ; then echo "ok" else

7. UNIX for Beginners Questions & Answers

For cycle, process order

Hello, I am running a script under ubuntu 16.04 I have no problem with the script. My question is general algorithm of for file command. I just need to know how for file in *.txt process works. Let's say, I wish to run the script by sorting filename: for file in *.txt do "do something in...

LEARN ABOUT PLAN9

chsh

CHSH(1)                                                            User Commands                                                           CHSH(1)

NAME

       chsh - change login shell

SYNOPSIS

       chsh [options] [LOGIN]

DESCRIPTION

       The chsh command changes the user login shell. This determines the name of the user's initial login command. A normal user may only change
       the login shell for her own account; the superuser may change the login shell for any account.

OPTIONS

       The options which apply to the chsh command are:

       -h, --help
           Display help message and exit.

       -R, --root CHROOT_DIR
           Apply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR directory.

       -s, --shell SHELL
           The name of the user's new login shell. Setting this field to blank causes the system to select the default login shell.

       If the -s option is not selected, chsh operates in an interactive fashion, prompting the user with the current login shell. Enter the new
       value to change the shell, or leave the line blank to use the current one. The current shell is displayed between a pair of [ ] marks.

NOTE

       The only restriction placed on the login shell is that the command name must be listed in /etc/shells, unless the invoker is the superuser,
       and then any value may be added. An account with a restricted login shell may not change her login shell. For this reason, placing /bin/rsh
       in /etc/shells is discouraged since accidentally changing to a restricted shell would prevent the user from ever changing her login shell
       back to its original value.

FILES

       /etc/passwd
           User account information.

       /etc/shells
           List of valid login shells.

       /etc/login.defs
           Shadow password suite configuration.

SEE ALSO

       chfn(1), login.defs(5), passwd(5).

shadow-utils 4.5                                                    01/25/2018                                                             CHSH(1)