Журнал лабораторных работ

10

root@debian6:~# l3script

#echo $c

10

10

#set | grep ^c

c=10

c=10

#env

SHELL=/bin/bash
TERM=xterm
SSH_CLIENT=192.168.16.101 49910 22
L3_PARENT_TTY=/dev/pts/1
L3_TAMPERED_EDITORS= vi vim pico nano vi vim pico nano
SSH_TTY=/dev/pts/0
USER=root
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
MAIL=/var/mail/root
L3_SESSION_ID=8037179322752329896-1443598194
PWD=/root
c=10
LANG=ru_RU.UTF-8

SHELL=/bin/bash
TERM=xterm
SSH_CLIENT=192.168.16.101 49910 22
L3_PARENT_TTY=/dev/pts/1
L3_TAMPERED_EDITORS= vi vim pico nano vi vim pico nano
SSH_TTY=/dev/pts/0
USER=root
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
MAIL=/var/mail/root
L3_SESSION_ID=8037179322752329896-1443598194
PWD=/root
c=10
LANG=ru_RU.UTF-8

#bash

root@debian6:~# echo $c
10
root@debian6:~# exit
exit

root@debian6:~# echo $c
10
root@debian6:~# exit
exit

#env

SHELL=/bin/bash
TERM=xterm
SSH_CLIENT=192.168.16.101 49910 22
L3_PARENT_TTY=/dev/pts/1
L3_TAMPERED_EDITORS= vi vim pico nano vi vim pico nano
SSH_TTY=/dev/pts/0
USER=root
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
MAIL=/var/mail/root
L3_SESSION_ID=8037179322752329896-1443598194
PWD=/root
c=10
LANG=ru_RU.UTF-8

SHELL=/bin/bash
TERM=xterm
SSH_CLIENT=192.168.16.101 49910 22
L3_PARENT_TTY=/dev/pts/1
L3_TAMPERED_EDITORS= vi vim pico nano vi vim pico nano
SSH_TTY=/dev/pts/0
USER=root
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
MAIL=/var/mail/root
L3_SESSION_ID=8037179322752329896-1443598194
PWD=/root
c=10
LANG=ru_RU.UTF-8

#bash

root@debian6:~# PS1='[\u \A]\$ '
[root 10:34]# exit
exit

root@debian6:~# PS1='[\u \A]\$ '
[root 10:34]# exit
exit

#echo $?

0

0

#echo $?

1

1

#help test

test: test [expr]
    Evaluate conditional expression.
    Exits with a status of 0 (true) or 1 (false) depending on
    the evaluation of EXPR.  Expressions may be unary or binary.  Unary
    expressions are often used to examine the status of a file.  There
    are string operators and numeric comparison operators as well.
    The behavior of test depends on the number of arguments.  Read the
    bash manual page for the complete specification.
    File operators:
      -a FILE        True if file exists.
...
      arg1 OP arg2   Arithmetic tests.  OP is one of -eq, -ne,
                     -lt, -le, -gt, or -ge.
    Arithmetic binary operators return true if ARG1 is equal, not-equal,
    less-than, less-than-or-equal, greater-than, or greater-than-or-equal
    than ARG2.
    See the bash manual page bash(1) for the handling of parameters (i.e.
    missing parameters).
    Exit Status:
    Returns success if EXPR evaluates to true; fails if EXPR evaluates to
    false or an invalid argument is given.

test: test [expr]
    Evaluate conditional expression.
    Exits with a status of 0 (true) or 1 (false) depending on
    the evaluation of EXPR.  Expressions may be unary or binary.  Unary
    expressions are often used to examine the status of a file.  There
    are string operators and numeric comparison operators as well.
    The behavior of test depends on the number of arguments.  Read the
    bash manual page for the complete specification.
    File operators:
      -a FILE        True if file exists.
...
      arg1 OP arg2   Arithmetic tests.  OP is one of -eq, -ne,
                     -lt, -le, -gt, or -ge.
    Arithmetic binary operators return true if ARG1 is equal, not-equal,
    less-than, less-than-or-equal, greater-than, or greater-than-or-equal
    than ARG2.
    See the bash manual page bash(1) for the handling of parameters (i.e.
    missing parameters).
    Exit Status:
    Returns success if EXPR evaluates to true; fails if EXPR evaluates to
    false or an invalid argument is given.

#ls -l

итого 8
-rw-r--r-- 1 root root 5268 Окт 13  2014 install

итого 8
-rw-r--r-- 1 root root 5268 Окт 13  2014 install

#echo $?

1

1

#~

GNU bash, version 4.2.37(1)-release (x86_64-pc-linux-gnu)
These shell commands are defined internally.  Type `help' to see this list.
Type `help name' to find out more about the function `name'.
Use `info bash' to find out more about the shell in general.
Use `man -k' or `info' to find out more about commands not in this list.
A star (*) next to a name means that the command is disabled.
 job_spec [&]                            history [-c] [-d offset] [n] or hist>
 (( expression ))                        if COMMANDS; then COMMANDS; [ elif C>
 . filename [arguments]                  jobs [-lnprs] [jobspec ...] or jobs >
 :                                       kill [-s sigspec | -n signum | -sigs>
...
 export [-fn] [name[=value] ...] or ex>  typeset [-aAfFgilrtux] [-p] name[=va>
 false                                   ulimit [-SHacdefilmnpqrstuvx] [limit>
 fc [-e ename] [-lnr] [first] [last] o>  umask [-p] [-S] [mode]
 fg [job_spec]                           unalias [-a] name [name ...]
 for NAME [in WORDS ... ] ; do COMMAND>  unset [-f] [-v] [name ...]
 for (( exp1; exp2; exp3 )); do COMMAN>  until COMMANDS; do COMMANDS; done
 function name { COMMANDS ; } or name >  variables - Names and meanings of so>
 getopts optstring name [arg]            wait [id]
 hash [-lr] [-p pathname] [-dt] [name >  while COMMANDS; do COMMANDS; done
 help [-dms] [pattern ...]               { COMMANDS ; }

GNU bash, version 4.2.37(1)-release (x86_64-pc-linux-gnu)
These shell commands are defined internally.  Type `help' to see this list.
Type `help name' to find out more about the function `name'.
Use `info bash' to find out more about the shell in general.
Use `man -k' or `info' to find out more about commands not in this list.
A star (*) next to a name means that the command is disabled.
 job_spec [&]                            history [-c] [-d offset] [n] or hist>
 (( expression ))                        if COMMANDS; then COMMANDS; [ elif C>
 . filename [arguments]                  jobs [-lnprs] [jobspec ...] or jobs >
 :                                       kill [-s sigspec | -n signum | -sigs>
...
 export [-fn] [name[=value] ...] or ex>  typeset [-aAfFgilrtux] [-p] name[=va>
 false                                   ulimit [-SHacdefilmnpqrstuvx] [limit>
 fc [-e ename] [-lnr] [first] [last] o>  umask [-p] [-S] [mode]
 fg [job_spec]                           unalias [-a] name [name ...]
 for NAME [in WORDS ... ] ; do COMMAND>  unset [-f] [-v] [name ...]
 for (( exp1; exp2; exp3 )); do COMMAN>  until COMMANDS; do COMMANDS; done
 function name { COMMANDS ; } or name >  variables - Names and meanings of so>
 getopts optstring name [arg]            wait [id]
 hash [-lr] [-p pathname] [-dt] [name >  while COMMANDS; do COMMANDS; done
 help [-dms] [pattern ...]               { COMMANDS ; }

#help cd

cd: cd [-L|[-P [-e]]] [dir]
    Change the shell working directory.
    Change the current directory to DIR.  The default DIR is the value of the
    HOME shell variable.
    The variable CDPATH defines the search path for the directory containing
    DIR.  Alternative directory names in CDPATH are separated by a colon (:).
    A null directory name is the same as the current directory.  If DIR begins
    with a slash (/), then CDPATH is not used.
    If the directory is not found, and the shell option `cdable_vars' is set,
    the word is assumed to be  a variable name.  If that variable has a value,
    its value is used for DIR.
    Options:
        -L      force symbolic links to be followed
        -P      use the physical directory structure without following symbolic
        links
        -e      if the -P option is supplied, and the current working directory
        cannot be determined successfully, exit with a non-zero status
    The default is to follow symbolic links, as if `-L' were specified.
    Exit Status:
    Returns 0 if the directory is changed, and if $PWD is set successfully when
    -P is used; non-zero otherwise.

cd: cd [-L|[-P [-e]]] [dir]
    Change the shell working directory.
    Change the current directory to DIR.  The default DIR is the value of the
    HOME shell variable.
    The variable CDPATH defines the search path for the directory containing
    DIR.  Alternative directory names in CDPATH are separated by a colon (:).
    A null directory name is the same as the current directory.  If DIR begins
    with a slash (/), then CDPATH is not used.
    If the directory is not found, and the shell option `cdable_vars' is set,
    the word is assumed to be  a variable name.  If that variable has a value,
    its value is used for DIR.
    Options:
        -L      force symbolic links to be followed
        -P      use the physical directory structure without following symbolic
        links
        -e      if the -P option is supplied, and the current working directory
        cannot be determined successfully, exit with a non-zero status
    The default is to follow symbolic links, as if `-L' were specified.
    Exit Status:
    Returns 0 if the directory is changed, and if $PWD is set successfully when
    -P is used; non-zero otherwise.

#which who

/usr/bin/who

/usr/bin/who

--- /tmp/l3-saved-2637.10788.18676	2015-09-30 10:53:42.515328410 +0300
+++ .exrc	2015-09-30 10:56:48.235318007 +0300
@@ -2,3 +2,5 @@
 set wm=10
 set number
 set hlsearch
+set mouse=a
+colorscheme desert

--- /tmp/l3-saved-2637.75.18878	2015-09-30 10:58:48.251324721 +0300
+++ privet.sh	2015-09-30 10:59:35.303320130 +0300
@@ -0,0 +1,2 @@
+#!/bin/bash
+echo Privet!

#bash privet.sh

Privet!

Privet!

#pwd

/root

/root

#./privet.sh

Privet!

Privet!

#id -u

0

0

#id

uid=0(root) gid=0(root) группы=0(root)

uid=0(root) gid=0(root) группы=0(root)

#~

 18   else
                            then
 19     if [ "`id -u`" -eq 0 ]; then                                   n:/root"
 20       PS1='# '
 21     else
 22       PS1='$ ', 851C
 23     fi
 24   fi
 25 fi
 26
...
 31   for i in /etc/profile.d/*.sh; do
 32     if [ -r $i ]; then
 33       . $i
 34     fi
 35   done
~
~
~
~
"/etc/profile" 37L, 857C записано

 18   else
                            then
 19     if [ "`id -u`" -eq 0 ]; then                                   n:/root"
 20       PS1='# '
 21     else
 22       PS1='$ ', 851C
 23     fi
 24   fi
 25 fi
 26
...
 31   for i in /etc/profile.d/*.sh; do
 32     if [ -r $i ]; then
 33       . $i
 34     fi
 35   done
~
~
~
~
"/etc/profile" 37L, 857C записано

exit
root@debian6:~# exit
exit

Privet!

[ ok ] Stopping enhanced syslogd: rsyslogd.

[ ok ] Starting enhanced syslogd: rsyslogd.

[ ok ] Stopping enhanced syslogd: rsyslogd.

[ ok ] Starting enhanced syslogd: rsyslogd.

--- /tmp/l3-saved-3123.25684.19483	2015-09-30 11:18:07.783334443 +0300
+++ test.sh	2015-09-30 11:18:36.295323340 +0300
@@ -2,7 +2,7 @@
 declare -i i=1
 while [ $i -le ${2:-10} ]
 	do
-		echo -n $i
+		echo -n "$i "
 		sleep ${1:-1}
 		i=$[$i+1]
 	done

1 2 3 4 5 6 7 8 9 10

1 2 3 4 5

  2 declare -i i=1
    while [ $i -le ${2:-10} ]
  3 while [ $i -le $
  5                 echo -n "$i "
  4                 sleep ${1:-1}
  7                 i=$[$i+1]
  5         done    echo -n "$i "
  8                 i=$[  +1]
 10 echo
  9
...
~
~
~
~
~
~
~
~
~
"test.sh" 10L, 141C записано

You enter 0 parametr
1 2 3 4 5 6 7 8 9 10