10 More Discussions You Might Find Interesting
1. UNIX for Beginners Questions & Answers
Hi,
If I want to list files with names containing a certain letter like " a " using just one ls command, is there any way of doing that?
Note that it is containing a letter instead of one of the following (starting, ending with a letter or having the letter in between). what I want is to show... (1 Reply)
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2. AIX
We are taking backup of our application data(cobol file system, AIX/unix) before and after EOD job runs. The data size is approximately 260 GB in biggest branch. To reduce the backup time, 5 parallel execution is scheduled through control-m which backups up the files in 5 different *.gz. The job... (8 Replies)
Discussion started by: Bharath_79
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3. AIX
We are taking backup of our application data(cobol file system, AIX/unix) before and after EOD job runs. The data size is approximately 260 GB in biggest branch. To reduce the backup time, 5 parallel execution is scheduled through control-m which backups up the files in 5 different *.gz. The job... (2 Replies)
Discussion started by: Bharath_79
2 Replies
4. Solaris
Hello All,
I am preparing a script to view or Extract contents of a tape drive using gtar.But facing a strange issue while trying to extract files using gtar.
If running script using sudo the getting the below error.
################
/usr/local/lib /usr/X11/lib /usr/X11R6/lib... (1 Reply)
Discussion started by: ajaincv
1 Replies
5. UNIX for Dummies Questions & Answers
I'm reading about debugging aids in bash and have come across the set command. It says in my little book that an addition to typing
set
you can also use them "on the command line when running a script..." and it lists this in a small table:
set -o option Command Line... (5 Replies)
Discussion started by: Straitsfan
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6. Shell Programming and Scripting
Hi,
I am working on a Linux machine.
I need to disable 2 options from the available 6 options of a command.
For eg. in the "ls" command we have various options like "l ,r, t, a, .... "
From this, I need to disable option "a"
So when the users type in "ls -a", they should get an error or... (4 Replies)
Discussion started by: aster007
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7. UNIX for Dummies Questions & Answers
I am trying to write a very large file, 570 gb, to a tape using gtar like this :
gtar czxf /dev/rmt/1 ./*
I get a message:
off_t value 570635451556 too large (max=68719476735)
It is writing to tape, but will it be good?
Thanks (1 Reply)
Discussion started by: iancrozier
1 Replies
8. Shell Programming and Scripting
Hi All,
We have a gtar file and we are trying to untar the file with the option
gtar -xvzf <filename>
The gtar gets us till the end and throws the error message as highlighed below
mfcp/XFHFCD2.CPY
mfcp/XFHFCD3.CPY
mfcp/XFHFCD.CPY
gzip: stdin: unexpected end of file
gtar:... (1 Reply)
Discussion started by: ganga.dharan
1 Replies
9. HP-UX
Just I gone with the script, I found some command's options which are not compatible with " HP-UX ".
If I found any alternate commands to the following, most probably I will solve the issue here.
1. " iostat -x " --> this command's option( x ) is not available in HP-UX... (2 Replies)
Discussion started by: pk_eee
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10. Shell Programming and Scripting
my description from another thread...
here's my code:
#!/bin/bash
IFS=$'\n'
function OutputName() {
input=$1
echo $input
input=`echo "$input" | sed -e 's/.//'`
input=`echo "$input".avi`
output_name=$input
}
if ]; then
echo... (5 Replies)
Discussion started by: TinCanFury
5 Replies
shell_builtins(1) shell_builtins(1)
NAME
shell_builtins, case, for, foreach, function, if, repeat, select, switch, until, while - shell command interpreter built-in commands
The shell command interpreters csh(1), ksh(1), and sh(1) have special built-in commands. The commands case, for, foreach, function, if,
repeat, select, switch, until, and while are commands in the syntax recognized by the shells. They are described in the Commands section of
the manual pages of the respective shells. The remaining commands listed in the table below are built into the shells for reasons such as
efficiency or data sharing between command invocations. They are described on their respective manual pages.
|
Command | Shell
alias |csh, ksh
bg |csh, ksh, sh
break |csh, ksh, sh
case |csh, ksh, sh
cd |csh, ksh, sh
chdir |csh, sh
continue |csh, ksh, sh
dirs |csh
echo |csh, ksh, sh
eval |csh, ksh, sh
exec |csh, ksh, sh
exit |csh, ksh, sh
export |ksh, sh
false |ksh
fc |ksh
fg |csh, ksh, sh
for |ksh, sh
foreach |csh
function |ksh
getopts |ksh, sh
glob |csh
goto |csh
hash |ksh, sh
hashstat |csh
history |csh
if |csh, ksh, sh
jobs |csh, ksh, sh
kill |csh, ksh, sh
let |ksh
limit |csh
login |csh, ksh, sh
logout |csh, ksh, sh
nice |csh
newgrp |ksh, sh
nohup |csh
notify |csh
onintr |csh
popd |csh
print |ksh
pushd |csh
pwd |ksh, sh
read |ksh, sh
readonly |ksh, sh
rehash |csh
repeat |csh
return |ksh, sh
select |ksh
set |csh, ksh, sh
setenv |csh
shift |csh, ksh, sh
source |csh
stop |csh, ksh, sh
suspend |csh, ksh, sh
switch |csh
test |ksh, sh
time |csh
times |ksh, sh
trap |ksh, sh
true |ksh
type |ksh, sh
typeset |ksh
ulimit |ksh, sh
umask |csh, ksh, sh
unalias |csh, ksh
unhash |csh
unlimit |csh
unset |csh, ksh, sh
unsetenv |csh
until |ksh, sh
wait |csh, ksh, sh
whence |ksh
while |csh, ksh, sh
Bourne Shell, sh, Special Commands
Input/output redirection is now permitted for these commands. File descriptor 1 is the default output location. When Job Control is
enabled, additional Special Commands are added to the shell's environment.
In addition to these built-in reserved command words, sh also uses:
: No effect; the command does nothing. A zero exit code is returned.
.filename Read and execute commands from filename and return. The search path specified by PATH is used to find the directory con-
taining filename.
C shell, csh
Built-in commands are executed within the C shell. If a built-in command occurs as any component of a pipeline except the last, it is exe-
cuted in a subshell. In addition to these built-in reserved command words, csh also uses:
: Null command. This command is interpreted, but performs no action.
Korn Shell, ksh, Special Commands
Input/Output redirection is permitted. Unless otherwise indicated, the output is written on file descriptor 1 and the exit status, when
there is no syntax error, is zero.
Commands that are preceded by one or two * (asterisks) are treated specially in the following ways:
1. Variable assignment lists preceding the command remain in effect when the command completes.
2. I/O redirections are processed after variable assignments.
3. Errors cause a script that contains them to abort.
4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari-
able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not
performed.
In addition to these built-in reserved command words, ksh also uses:
* : [ arg ... ] The command only expands parameters.
* .file [ arg ..Read the complete file then execute the commands. The commands are executed in the current shell environment. The search
path specified by PATH is used to find the directory containing file. If any arguments arg are given, they become the posi-
tional parameters. Otherwise, the positional parameters are unchanged. The exit status is the exit status of the last com-
mand executed. the loop termination test.
intro(1), alias(1), break(1), cd(1), chmod(1), csh(1), echo(1), exec(1), exit(1), find(1), getoptcvt(1), getopts(1), glob(1), hash(1), his-
tory(1), jobs(1), kill(1), ksh(1), let(1), limit(1), login(1), logout(1), newgrp(1), nice(1), nohup(1), print(1), pwd(1), read(1), read-
only(1), set(1), sh(1), shift(1), suspend(1), test(1B), time(1), times(1), trap(1), typeset(1), umask(1), wait(1), chdir(2), chmod(2),
creat(2), umask(2), getopt(3C), profile(4), environ(5)
29 Jun 2005 shell_builtins(1)