linuxShell的簡單練習
阿新 • • 發佈：2018-03-25
內容 計算 分區類型 ase color log bz2 passwd 除了 
- 用腳本添加10個用戶
#!/bin/bash 2 3 for i in {1..10};do 4 if ! id user$i &> /dev/null ;then 5 useradd user$i 6 echo user$i | passwd --stdin user$i &> /dev/null 7 echo "add user$i finished" 8 else 9 echoView Code"user$i exists" 10 fi 11 12 done
- 刪除用戶
1 #!/bin/bash 2 3 for I in {1..10};do 4 if id user$I &> /dev/null ;then 5 userdel -r user$I 6 echo "del user$I finish" 7 else 8 echo "user$I not existsView Code" 9 fi 10 done
- 添加或刪除用戶
#!/bin/bash 2 3 if [ $# -lt 1 ];then 4 echo "Uage : adminusers ARG" 5 exit 1 6 fi 7 if [ $# -gt 1 ];then 8 echo "too many argument" 9 exit 2 10 fi 11 12 if [ $1 == ‘add‘ ];then 13 for I in {1View Code..10};do 14 if id user$I &> /dev/null;then 15 echo "user$I exists" 16 else 17 useradd user$I 18 echo "user$I" | passwd --stdin user$I &> /dev/null 19 fi 20 done elif [ $1 == ‘del‘ ];then 24 for I in {1..10};do 25 if ! id user$I &> /dev/null;then 26 echo "user$I not exists" 27 else 28 userdel user$I 29 echo "user$I deleted" 30 fi 31 done else echo "Unkown you input you common!" 32 fi
- 更加復雜的添加用戶命令
#!/bin/bash 2 3 echo $1 4 if [ $1 == ‘--add‘ ];then 5 for I in `echo $2 | sed ‘s/,/ /g‘`;do 6 if id $I &> /dev/null;then 7 echo "$I exists" 8 else 9 useradd $I 10 echo $I | passwd --stdin $I &> /dev/null 11 echo "$I add finish" 12 fi 13 done 14 elif [ $1 == ‘--del‘ ];then for I in `echo $2 | sed ‘s/,/ /g‘`;do 16 if id $I &> /dev/null;then 17 userdel -r $I 18 echo "$I deleted" 19 else 20 echo "$I not exist" 21 fi 22 done 23 elif [ $1 == ‘--help‘ ];then 24 echo "Usage:--add,--del" 25 else 26 echo "Unkown options" 27 fiView Code
- 計算100內的奇數和，偶數和
declare -i ODDSUM declare -i EVENSUM for i in `seq 1 100`;do if [ $[$i%2] == 0 ];then let EVENSUM+=$i else let ODDSUM+=$i fi done echo "ODDSUM=$ODDSUM" echo "EVENSUM=$EVENSUM"View Code
- 更為強大的添加刪除幫助
#!/bin/bash # DEBUG=0 ADD=0 DEL=0 for I in `seq 0 $#`; do if [ $# -gt 0 ]; then case $1 in -v|--verbose) DEBUG=1 shift ;; -h|--help) echo "Usage: `basename $0` --add USER_LIST --del USER_LIST -v|--verbose -h|--help" exit 0 ;; --add) ADD=1 ADDUSERS=$2 shift 2 ;; --del) DEL=1 DELUSERS=$2 shift 2 ;; *) echo "Usage: `basename $0` --add USER_LIST --del USER_LIST -v|--verbose -h|--help" exit 7 ;; esac fi done if [ $ADD -eq 1 ]; then for USER in `echo $ADDUSERS | sed ‘s@,@ @g‘`; do if id $USER &> /dev/null; then [ $DEBUG -eq 1 ] && echo "$USER exists." else useradd $USER [ $DEBUG -eq 1 ] && echo "Add user $USER finished." fi done fi if [ $DEL -eq 1 ]; then for USER in `echo $DELUSERS | sed ‘s@,@ @g‘`; do if id $USER &> /dev/null; then userdel -r $USER [ $DEBUG -eq 1 ] && echo "Delete $USER finished." else [ $DEBUG -eq 1 ] && echo "$USER not exist." fi done fiView Code
- 寫一個腳本showlogged.sh，其用法格式為： showlogged.sh -v -c -h|--help 其中，-h選項只能單獨使用，用於顯示幫助信息；-c選項時，顯示當前系統上登錄的所有用戶數 ；如果同時使用了-v選項，則既顯示同時登錄的用戶數，又顯示登錄的用戶的相關信息；
#!/bin/bash # declare -i SHOWNUM=0 declare -i SHOWUSERS=0 for I in `seq 1 $#`; do if [ $# -gt 0 ]; then case $1 in -h|--help) echo "Usage: `basename $0` -h|--help -c|--count -v|--verbose" exit 0 ;; -v|--verbose) let SHOWUSERS=1 shift ;; -c|--count) let SHOWNUM=1 shift ;; *) echo "Usage: `basename $0` -h|--help -c|--count -v|--verbose" exit 8 ;; esac fi done if [ $SHOWNUM -eq 1 ]; then echo "Logged users: `who | wc -l`." if [ $SHOWUSERS -eq 1 ]; then echo "They are:" who fi fiView Code
- 用戶輸入文件，按照指定壓縮格式進行壓縮
#!/bin/bash read -p "input three file to tar :" FILE1 FILE2 FILE3 read -p "select object name:" TARNAME read -p "select Compress type:gzip|bzip2|xz:" COMPRESS case $COMPRESS in gzip) tar -zcf ${TARNAME}.tar.gz $FILE1 $FILE2 $FILE3 ;; bzip2) tar -jcf ${TARNAME}.tar.bz2 $FILE1 $FILE2 $FILE3 ;; xz) tar -Jcf ${TARNAME}.tar.xz $FILE1 $FILE2 $FILE3 ;; *) echo "Unknow you command" ;; esacView Code
- 寫一個腳本： 1) 顯示一個菜單給用戶： d|D) show disk usages. m|M) show memory usages. s|S) show swap usages. *) quit. 2) 當用戶給定選項後顯示相應的內容；
#!/bin/bash # cat << EOF d|D) show disk usages. m|M) show memory usages. s|S) show swap usages. *) quit. EOF read -p "Your choice: " CHOICE while [ $CHOICE != ‘quit‘ ];do case $CHOICE in d|D) echo "Disk usage: " df -Ph ;; m|M) echo "Memory usage: " free -m | grep "Mem" ;; s|S) echo "Swap usage: " free -m | grep "Swap" ;; *) echo "Unknown.." ;; esac read -p "Again, your choice: " CHOICE doneView Code
- 寫一個腳本： 1) 顯示一個菜單給用戶： d|D) show disk usages. m|M) show memory usages. s|S) show swap usages. *) quit. 2) 當用戶給定選項後顯示相應的內容； 當用戶選擇完成，顯示相應信息後，不退出；而讓用戶再一次選擇，再次顯示相應內容；除了用戶使用quit；
#!/bin/bash cat << EOF d|D) show disk usages. m|M) show memory usages. s|S) show swap usages. *) quit. EOF echo -ne "\033[1;34mplease input you choice(input quit to exit):\033[0m" read CHOICE while [ $CHOICE != "quit" ];do case $CHOICE in d|D) echo -e "\e[1;32mdisk usages\e[0m" df -Ph ;; m|M) echo -e "\e[1;32mmemory usages\e[0m" free -m | grep "Mem" ;; s|S) echo -e "\e[1;32mswap usages\e[0m" free -m | grep "Swap" ;; *) echo "Unkown you input command" ;; esac echo -e "\e[1;35mplease input againt command:\e[0m" read CHOICE doneView Code
- 寫一個腳本(前提：請為虛擬機新增一塊硬盤，假設它為/dev/sdb)，為指定的硬盤創建分區： 1、列出當前系統上所有的磁盤，讓用戶選擇，如果選擇quit則退出腳本；如果用戶選擇錯誤，就讓用戶重新選擇； 2、當用戶選擇後，提醒用戶確認接下來的操作可能會損壞數據，並請用戶確認；如果用戶選擇y就繼續，n就退出； 否則，讓用戶重新選擇； 3、抹除那塊硬盤上的所有分區(提示，抹除所有分區後執行sync命令，並讓腳本睡眠3秒鐘後再分區)； 並為其創建三個主分區，第一個為20M，第二個為512M, 第三個為128M，且第三個為swap分區類型； (提示：將分區命令通過echo傳送給fdisk即可實現)
#!/bin/bash echo "Initial a disk...." echo -e "\033[31mWarning:\033[0m" fdisk -l 2> /dev/null | grep -o "^Disk /dev/[sh]d[a-z]" read -p "your chioce:" PARTDISK if [ $PARTDISK == ‘quit‘ ];then echo "quit" exit 7 fi until fdisk -l 2> /dev/null | grep -o "^Disk /dev/[sh]d[a-z]" | grep "^Disk $PARTDISK" &> /dev/null;do read -p "Wrong option,your choice aging:" PARTDISK done read -p "Will destroy all data,continue,are you sure[y|n]: " CHIOCE until [ $CHIOCE == ‘y‘ -o $CHIOCE == ‘n‘ ];do read -p "Will destroy all data,continue: " CHIOCE done if [ $CHIOCE == ‘n‘ ];then echo "Quit" exit 9 else dd if=/dev/zero of=$PARTDISK bs=512 count=1 sync sleep 3 echo ‘n p 1 +20M n p 2 +512M n p 3 +128M t 3 82 w‘| fdisk $PARTDISK &> /dev/null partprobe $PARTDISK sync sleep 2 mke2fs -j ${PARTDISK}1 &> /dev/null mke2fs -j ${PARTDISK}2 &> /dev/null mkswap ${PARTDISK}3 &> /dev/nullView Code
- 復制二進制程序及其依賴的庫文件的腳本：
#!/bin/bash # DEST=/mnt/sysroot libcp() { LIBPATH=${1%/*} [ ! -d $DEST$LIBPATH ] && mkdir -p $DEST$LIBPATH [ ! -e $DEST${1} ] && cp $1 $DEST$LIBPATH && echo "copy lib $1 finished." } bincp() { CMDPATH=${1%/*} [ ! -d $DEST$CMDPATH ] && mkdir -p $DEST$CMDPATH [ ! -e $DEST${1} ] && cp $1 $DEST$CMDPATH for LIB in `ldd $1 | grep -o "/.*lib\(64\)\{0,1\}/[^[:space:]]\{1,\}"`; do libcp $LIB done } read -p "Your command: " CMD until [ $CMD == ‘q‘ ]; do ! which $CMD &> /dev/null && echo "Wrong command" && read -p "Input again:" CMD && continue COMMAND=` which $CMD | grep -v "^alias" | grep -o "[^[:space:]]\{1,\}"` bincp $COMMAND echo "copy $COMMAND finished." read -p "Continue: " CMD doneView Code
linuxShell的簡單練習